---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 09/14/13: 16 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:18 AM - Why does a master switch turn off devices? (Dan Charrois) 2. 12:37 AM - Re: Looking for a circuit that when you press a button powers the device but .... (Peter Pengilly) 3. 12:46 AM - Re: Why does a master switch turn off devices? (Peter Pengilly) 4. 04:31 AM - Re: Alternator Whine in Radio Transmit (Ron Lendon) 5. 06:56 AM - Re: Looking for a circuit that when you press a button powers the device but .... (Charlie England) 6. 07:10 AM - Re: Looking for a circuit that when you press a button powers th (Eric M. Jones) 7. 09:39 AM - Re: Re: Bad Crimp? (Dave Saylor) 8. 09:41 AM - Re: Why does a master switch turn off devices? (Ed) 9. 12:31 PM - Re: Re: Looking for a circuit that when you press a button powers th (Jeffrey Skiba) 10. 12:49 PM - Re: Re: Looking for a circuit that when you press a button powers th (Daniel Hooper) 11. 01:02 PM - Re: Re: Looking for a circuit that when you press a button powers th (Jeffrey Skiba) 12. 01:19 PM - Re: Re: Looking for a circuit that when you press a button powers th (Bob McCallum) 13. 01:31 PM - testing; no reply needed (Charlie England) 14. 01:51 PM - Re: Re: Looking for a circuit that when you press a button powers th (Stein Bruch) 15. 04:12 PM - Re: Re: Looking for a circuit that when you press a button powers th (Jeffrey Skiba) 16. 06:15 PM - Re: Re: Looking for a circuit that when you press a button powers th (Bob McCallum) ________________________________ Message 1 _____________________________________ Time: 12:18:33 AM PST US Subject: AeroElectric-List: Why does a master switch turn off devices? From: Dan Charrois I've never quite understood something about aircraft electrical systems and I'm hoping someone here can enlighten me. I've always flown under the impression that a primary purpose of the master switch is to effectively connect/disconnect power from the electrical bus, which in turns provides for the flight instruments and other electrical devices in the cockpit. However, my question is that since the alternator is typically connected on the bus side of the master contactor (not the battery side), why doesn't the alternator continue to provide electrical power to the bus while the engine is running when the master is off? Or does it? I have to admit to not ever having tried to switch off the master in flight, but I've been under the impression that doing so should turn off the electrical equipment - it's after all, a recommendation to turn off the master in a forced approach. >From the electrical diagrams I've seen, it would seem as though that switching off the master while the engine is running should do nothing other than disconnect the battery from the bus, which would not prevent the alternator from continuing to power electrical devices, but instead merely remove the battery's ability to absorb transients, etc. Wouldn't the alternator continue to supply its own field current once it is already running, so long as the alternator switch remains on? I think I'm missing something pretty basic here. Any help would be greatly appreciated! Dan -- Syzygy Research & Technology Box 83, Legal, AB T0G 1L0 Canada Phone: 780-961-2213 ________________________________ Message 2 _____________________________________ Time: 12:37:33 AM PST US From: Peter Pengilly Subject: Re: AeroElectric-List: Looking for a circuit that when you press a button powers the device but .... So once it is latched on how do you turn it off? A 3 second press is a long time, assuming the usual operation is to turn it on an leave it on might be best to turn things around. If device is off: - Short press (say < 1 second); device turns on. - Long press (> 1 second); device turns on for 3 seconds, or duration of press if longer, and then turns off. If device is on: - Short press (perhaps any press); device turns off Thinking about this some more, it would be easier if the 3 second requirement is removed, so requirements become: Button is pressed: device turns on; Button is released: device turns off; Ignore button release if within 1 second after button press. This does mean that button has to be pressed for > 1 sec to turn off, but that prevents inadvertent knocks turning it off. Hope this helps, Peter On 14/09/2013 01:45, Henador Titzoff wrote: > Jeff, > > I believe you need a better spec. For example, you say that when the > button is pressed, the device is powered on. Then you say if the > button is released before the 3 second interval, it should stop > powering the device. Or at least that's what I think you said. > > I think you need to divide it into the following functions: > > * If the button is pressed for less than N seconds, function 1 happens > * If the button is pressed for more than N seconds, function 2 happens > * If the button is held for exactly N seconds, well never mind, > there is no such thing unless you have an accuracy spec. If you > do, then function 3 happens. These three functions need not be > mutually exclusive. > > > Whatever functionality you want, I believe a microcontroller or CPLD > will do the job. If you describe your functionality more accurately, > including output voltage, current, etc., then this group can recommend > specific products, including boards. > > Henador Titzoff > > ------------------------------------------------------------------------ > *From:* Jeffrey Skiba > *To:* "aeroelectric-list@matronics.com" > *Sent:* Friday, September 13, 2013 7:27 PM > *Subject:* AeroElectric-List: Looking for a circuit that when you > press a button powers the device but .... > > > > > Looking for a circuit that when you press a button powers the device > but ....if the button is held on it is only powered for a max setting > (say 3 seconds) but this same circuit should stop if the button is > released before the 3 seconds. > > Hope that makes sense, I bet it exists already and I just am searching > under the wrong name. > > Thanks in advance for the help > > Je= --> http://www.matronics.com/Navigator?AeroElectric-Lista > href="http://forums.matronics.com/" target="_blank">http://forums.mat > &nbs//www.matronics.com/contribution" > target="_blank">http://www.matronics.co================= > > > * > > > * ________________________________ Message 3 _____________________________________ Time: 12:46:43 AM PST US From: Peter Pengilly Subject: Re: AeroElectric-List: Why does a master switch turn off devices? I don't think you are missing anything, you've described what happens! The alternator should continue to power the bus if the master is switched off (or fails) - its not recommended for the reason you identified. If the alternator fed into the battery, and not the bus, failure of the master contactor would be a single point failure that would take down the whole system. That could be catastrophic in IMC with electric gyros. Switching the master off before an emergency landing is possibly a through toward minimizing fire risk? Peter On 14/09/2013 08:17, Dan Charrois wrote: > > I've never quite understood something about aircraft electrical systems and I'm hoping someone here can enlighten me. > > I've always flown under the impression that a primary purpose of the master switch is to effectively connect/disconnect power from the electrical bus, which in turns provides for the flight instruments and other electrical devices in the cockpit. However, my question is that since the alternator is typically connected on the bus side of the master contactor (not the battery side), why doesn't the alternator continue to provide electrical power to the bus while the engine is running when the master is off? Or does it? I have to admit to not ever having tried to switch off the master in flight, but I've been under the impression that doing so should turn off the electrical equipment - it's after all, a recommendation to turn off the master in a forced approach. > > >From the electrical diagrams I've seen, it would seem as though that switching off the master while the engine is running should do nothing other than disconnect the battery from the bus, which would not prevent the alternator from continuing to power electrical devices, but instead merely remove the battery's ability to absorb transients, etc. Wouldn't the alternator continue to supply its own field current once it is already running, so long as the alternator switch remains on? > > I think I'm missing something pretty basic here. Any help would be greatly appreciated! > > Dan > -- > Syzygy Research & Technology > Box 83, Legal, AB T0G 1L0 Canada > Phone: 780-961-2213 > > ________________________________ Message 4 _____________________________________ Time: 04:31:18 AM PST US Subject: AeroElectric-List: Re: Alternator Whine in Radio Transmit From: "Ron Lendon" Thanks Bob, This is the part of the instructions from the Sigtronics Installation instructions I missed. 2. Connect all intercom mic jack grounds to a single aircraft chassis ground point - Intercom Central ground Point A - as shown in Figure 4. (Use the black washers supplied to insulate the intercom mic jacks from aircraft chassis ground). Note this intercom central grounding point is used to eliminate any unwanted electrical noises, such as alternator whine or strobe noise, from being induced into the intercom system through the grounds. All intercom mic jack barrels must be insulated from ground where they are mounted and connected back to Intercom Central Ground Point A on their own individual ground wire. Similarly, both intercom ground wires (J1 pin 4) and the push-to-transmit switch grounds must also be connected back to Intercom Central Ground Point A . It is not necessary, however, to connect the headphone jack barrels to Intercom Central Ground Point A . They can either be grounded where they are mounted or some place nearby. I have the airplane opened up and will remedy this oversight promptly. -------- Ron Lendon WW Corvair with Roy's Garage 5th bearing CH 601 XLB N601LT - Flying http://www.mykitlog.com/rlendon Corvair Engine Prints: https://sites.google.com/site/corvairenginedata/ Read this topic online here: http://forums.matronics.com/viewtopic.php?p=408578#408578 ________________________________ Message 5 _____________________________________ Time: 06:56:38 AM PST US From: Charlie England Subject: Re: AeroElectric-List: Looking for a circuit that when you press a button powers the device but .... To answer your question (instead of trying to change your requirements) :-), A 555 timer integrated circuit would do what you want, with added components to handle whatever current you need to drive your device. The (momentary contact) switch, when pressed, would supply power to the timer *and* the trigger signal. The timer would be configured to stay on for the specified time. It would drive the high-current driver device (transistor or relay). If you hold the button, the timer runs & then shuts off. If you press the button for less than the preset interval, power is removed from the timer which removes activation from the transistor/relay. https://www.google.com/search?q=555+timer+circuits&rlz=1C1CHFX_enUS553US553&oq=555+timer&aqs=chrome.2.69i57j5j0l2.7716j0&sourceid=chrome&ie=UTF-8 Look for 'monostable mode': http://www.555-timer-circuits.com/operating-modes.html You'd need the switch to both supply power to the timer, and take the signal input 'low' (to ground). This could be done with a 2 pole switch, or with some type of signal inverter (transistor, inverter IC, even another relay). Remember, the key is to have the switch actually supply power to the 555, so that releasing the switch removes power from the 555 & therefore, the output signal to the power device. This is just the quickest/dirtiest method that comes to mind. 2nd option: use a 2 pole momentary switch, with one pole supplying the trigger and the other in series with the output of the 555. This is probably a more stable way of doing it, but would mean that the circuit would be powered up all the time instead of only when needed. If you poke around the search link long enough, you'll probably find a complete circuit already designed that does exactly what you want. Charlie On 9/14/2013 2:37 AM, Peter Pengilly wrote: > So once it is latched on how do you turn it off? > > A 3 second press is a long time, assuming the usual operation is to > turn it on an leave it on might be best to turn things around. > > If device is off: > - Short press (say < 1 second); device turns on. > - Long press (> 1 second); device turns on for 3 seconds, or duration > of press if longer, and then turns off. > > If device is on: > - Short press (perhaps any press); device turns off > > Thinking about this some more, it would be easier if the 3 second > requirement is removed, so requirements become: > Button is pressed: device turns on; > Button is released: device turns off; > Ignore button release if within 1 second after button press. > > This does mean that button has to be pressed for > 1 sec to turn off, > but that prevents inadvertent knocks turning it off. > > Hope this helps, > Peter > > On 14/09/2013 01:45, Henador Titzoff wrote: >> Jeff, >> >> I believe you need a better spec. For example, you say that when the >> button is pressed, the device is powered on. Then you say if the >> button is released before the 3 second interval, it should stop >> powering the device. Or at least that's what I think you said. >> >> I think you need to divide it into the following functions: >> >> * If the button is pressed for less than N seconds, function 1 happens >> * If the button is pressed for more than N seconds, function 2 happens >> * If the button is held for exactly N seconds, well never mind, >> there is no such thing unless you have an accuracy spec. If you >> do, then function 3 happens. These three functions need not be >> mutually exclusive. >> >> >> Whatever functionality you want, I believe a microcontroller or CPLD >> will do the job. If you describe your functionality more accurately, >> including output voltage, current, etc., then this group can >> recommend specific products, including boards. >> >> Henador Titzoff >> >> ------------------------------------------------------------------------ >> *From:* Jeffrey Skiba >> *To:* "aeroelectric-list@matronics.com" >> >> *Sent:* Friday, September 13, 2013 7:27 PM >> *Subject:* AeroElectric-List: Looking for a circuit that when you >> press a button powers the device but .... >> >> > >> >> Looking for a circuit that when you press a button powers the device >> but ....if the button is held on it is only powered for a max setting >> (say 3 seconds) but this same circuit should stop if the button is >> released before the 3 seconds. >> >> Hope that makes sense, I bet it exists already and I just am >> searching under the wrong name. >> >> Thanks in advance for the help >> >> Je= --> http://www.matronics.com/Navigator?AeroElectric-Lista >> href="http://forums.matronics.com/" target="_blank">http://forums.mat >> &nbs//www.matronics.com/contribution" >> target="_blank">http://www.matronics.co================= >> >> >> >> >> >> * >> >> >> * > > * > > > * ________________________________ Message 6 _____________________________________ Time: 07:10:40 AM PST US Subject: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th From: "Eric M. Jones" > Looking for a circuit that when you press a button powers the device but ....if the button is held on it is only powered for a max setting (say 3 seconds) but this same circuit should stop if the button is released before the 3 seconds. > Jeff. The circuit you want is a momentary push button with a resettable fuse. Preferably solid state. -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones(at)charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=408582#408582 ________________________________ Message 7 _____________________________________ Time: 09:39:24 AM PST US From: Dave Saylor Subject: Re: AeroElectric-List: Re: Bad Crimp? Yep, I have a few tools to take a look at. Hopefully it's a case of using the wrong crimper slot. It's a 20AWG in a red PIDG terminal. FWIW, the wire felt very slightly loose in the connector, but it didn't pull out. Just kind of worked back and forth. Dave Saylor 831-750-0284 CL On Fri, Sep 13, 2013 at 6:58 PM, nuckollsr wrote: > bob.nuckolls@aeroelectric.com> > > I think the evidence is pretty conclusive. ANY terminal that gets hot is > victim to heat dissipated in some resistance between wire and terminal or > terminal and installation surface . . . or both. > > Compare the appearance of cross section for the terminal you replaces > versus a terminal I sectioned for this article: > > http://tinyurl.com/kfk6jss > > The terminal you removed was definitely not INTIMATELY mated with the wire > strands. There are voids between strands and a large void in the cavity > adjacent to captured strands. In the "golden-crush", wires become > indistinguishable from the terminal's wire grip barrel. > > Was the terminal the right size for the wire? If it was installed with a > tool from your shop, an investigation is warranted. You don't want to > install a bunch of terminals like that! > > Bob . . . > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=408569#408569 > > > Attachments: > > http://forums.matronics.com//files/photo_135_164.jpg > > ________________________________ Message 8 _____________________________________ Time: 09:41:26 AM PST US From: Ed Subject: Re: AeroElectric-List: Why does a master switch turn off devices? The Cessna style split master switch also turns off the field which kills the alternator. Bob's Z figures often do this with a DPST switch. Ed Holyoke On 9/14/2013 12:17 AM, Dan Charrois wrote: > > I've never quite understood something about aircraft electrical systems and I'm hoping someone here can enlighten me. > > I've always flown under the impression that a primary purpose of the master switch is to effectively connect/disconnect power from the electrical bus, which in turns provides for the flight instruments and other electrical devices in the cockpit. However, my question is that since the alternator is typically connected on the bus side of the master contactor (not the battery side), why doesn't the alternator continue to provide electrical power to the bus while the engine is running when the master is off? Or does it? I have to admit to not ever having tried to switch off the master in flight, but I've been under the impression that doing so should turn off the electrical equipment - it's after all, a recommendation to turn off the master in a forced approach. > >>From the electrical diagrams I've seen, it would seem as though that switching off the master while the engine is running should do nothing other than disconnect the battery from the bus, which would not prevent the alternator from continuing to power electrical devices, but instead merely remove the battery's ability to absorb transients, etc. Wouldn't the alternator continue to supply its own field current once it is already running, so long as the alternator switch remains on? > > I think I'm missing something pretty basic here. Any help would be greatly appreciated! > > Dan > -- > Syzygy Research & Technology > Box 83, Legal, AB T0G 1L0 Canada > Phone: 780-961-2213 > > ________________________________ Message 9 _____________________________________ Time: 12:31:48 PM PST US From: Jeffrey Skiba Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th Sorry for the bad specs, let me try again Functions: Press a momentary switch device turns on release same switch device turns off (even if shorter than the below set time) Press same switch and hold for more than x time say 2 or 3 seconds (would like that to be adjustable if Possible) the device will only be on for the max set time even if button still held, to get device on again you would have to release button and press again. Do not care if solid state or relay, would probably prefer solid state, ultimately looking for simple and CHEAP to build or buy. This needs to run off 12-14 volts Hope that clears things up ? Jeff. -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Eric M. Jones Sent: Saturday, September 14, 2013 9:10 AM Subject: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th --> > Looking for a circuit that when you press a button powers the device but ....if the button is held on it is only powered for a max setting (say 3 seconds) but this same circuit should stop if the button is released before the 3 seconds. > Jeff. The circuit you want is a momentary push button with a resettable fuse. Preferably solid state. -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones(at)charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=408582#408582 ________________________________ Message 10 ____________________________________ Time: 12:49:22 PM PST US Subject: Re: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th From: Daniel Hooper ..a circuit that will only be on for 3 seconds maximum, even if you're still holding down the button. If you let go early, it turns off early. Do I have that right? What is the load you're driving? How much current? Daniel On Sep 14, 2013, at 2:30 PM, Jeffrey Skiba wrote: > > Sorry for the bad specs, let me try again > > Functions: > Press a momentary switch device turns on release same switch device turns off (even if shorter than the below set time) > Press same switch and hold for more than x time say 2 or 3 seconds (would like that to be adjustable if Possible) the device will only be on for the max set time even if button still held, to get device on again you would have to release button and press again. > Do not care if solid state or relay, would probably prefer solid state, ultimately looking for simple and CHEAP to build or buy. > This needs to run off 12-14 volts > > Hope that clears things up ? > > Jeff. > > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Eric M. Jones > Sent: Saturday, September 14, 2013 9:10 AM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th > > --> > > >> Looking for a circuit that when you press a button powers the device but ....if the button is held on it is only powered for a max setting (say 3 seconds) but this same circuit should stop if the button is released before the 3 seconds. >> Jeff. > > > The circuit you want is a momentary push button with a resettable fuse. Preferably solid state. > > -------- > Eric M. Jones > www.PerihelionDesign.com > 113 Brentwood Drive > Southbridge, MA 01550 > (508) 764-2072 > emjones(at)charter.net > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=408582#408582 > > > > > > > > > > > > > > > ________________________________ Message 11 ____________________________________ Time: 01:02:23 PM PST US From: Jeffrey Skiba Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th Driving a servo max current would be 900 milliamps. .a circuit that will only be on for 3 seconds maximum, even if you're still holding down the button. If you let go early, it turns off early. Do I have that right? You GOT it -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Daniel Hooper Sent: Saturday, September 14, 2013 2:49 PM Subject: Re: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th --> ..a circuit that will only be on for 3 seconds maximum, even if you're still holding down the button. If you let go early, it turns off early. Do I have that right? What is the load you're driving? How much current? Daniel On Sep 14, 2013, at 2:30 PM, Jeffrey Skiba wrote: > --> > > Sorry for the bad specs, let me try again > > Functions: > Press a momentary switch device turns on release same switch device > turns off (even if shorter than the below set time) Press same switch and hold for more than x time say 2 or 3 seconds (would like that to be adjustable if Possible) the device will only be on for the max set time even if button still held, to get device on again you would have to release button and press again. > Do not care if solid state or relay, would probably prefer solid state, ultimately looking for simple and CHEAP to build or buy. > This needs to run off 12-14 volts > > Hope that clears things up ? > > Jeff. > > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of > Eric M. Jones > Sent: Saturday, September 14, 2013 9:10 AM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: Re: Looking for a circuit that when you > press a button powers th > > --> > > >> Looking for a circuit that when you press a button powers the device but ....if the button is held on it is only powered for a max setting (say 3 seconds) but this same circuit should stop if the button is released before the 3 seconds. >> Jeff. > > > The circuit you want is a momentary push button with a resettable fuse. Preferably solid state. > > -------- > Eric M. Jones > www.PerihelionDesign.com > 113 Brentwood Drive > Southbridge, MA 01550 > (508) 764-2072 > emjones(at)charter.net > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=408582#408582 > > > > > > > > > > > > > > > ________________________________ Message 12 ____________________________________ Time: 01:19:40 PM PST US From: Bob McCallum Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th Jeff; Momentary normally open pushbutton in series with a timer which opens the load after the preset delay time. Because button is momentary and in series with the load and the timer, it must be held to power the load for any period of time. Any time it is released the load loses power. The timer opens the load after the preset delay even if the button is still maintained. Releasing the button resets the timer whether or not it has timed out. Provides exactly the functionality you describe. One example of such a timer is Omron H3RN-1 which is available in 12 VDC (also 24 VAC and 24 VDC) and in 2 timing ranges from .1 sec to 10 min OR .1 min to 10 HR. This particular timer will switch a resistive load of 3 amps up to 250 Volts. Spec sheet found here; http://tinyurl.com/mruy73u This is a plug in solid state timer with a relay output (SPDT) Bob McC > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list- > server@matronics.com] On Behalf Of Jeffrey Skiba > Sent: Saturday, September 14, 2013 3:31 PM > To: aeroelectric-list@matronics.com > Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you press a button > powers th > > > Sorry for the bad specs, let me try again > > Functions: > Press a momentary switch device turns on release same switch device turns off (even > if shorter than the below set time) > Press same switch and hold for more than x time say 2 or 3 seconds (would like that > to be adjustable if Possible) the device will only be on for the max set time even if > button still held, to get device on again you would have to release button and press > again. > Do not care if solid state or relay, would probably prefer solid state, ultimately looking > for simple and CHEAP to build or buy. > This needs to run off 12-14 volts > > Hope that clears things up ? > > Jeff. > > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list- > server@matronics.com] On Behalf Of Eric M. Jones > Sent: Saturday, September 14, 2013 9:10 AM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: Re: Looking for a circuit that when you press a button > powers th > > --> > > > > Looking for a circuit that when you press a button powers the device but ....if the > button is held on it is only powered for a max setting (say 3 seconds) but this same > circuit should stop if the button is released before the 3 seconds. > > Jeff. > > > The circuit you want is a momentary push button with a resettable fuse. Preferably > solid state. > > -------- > Eric M. Jones > www.PerihelionDesign.com > 113 Brentwood Drive > Southbridge, MA 01550 > (508) 764-2072 > emjones(at)charter.net > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=408582#408582 > > > > > > > > > > > > > _- > ==================================================== > ====== > _- > ==================================================== > ====== > _- > ==================================================== > ====== > _- > ==================================================== > ====== > > ________________________________ Message 13 ____________________________________ Time: 01:31:03 PM PST US From: Charlie England Subject: AeroElectric-List: testing; no reply needed ________________________________ Message 14 ____________________________________ Time: 01:51:13 PM PST US From: "Stein Bruch" Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th I know this this probably doesn't exactly fit your "cheap" requirement, but I'm guessing it's pretty close to what you're trying to do here. By the time you round up all the components and put some of your own time into it, I'd bet you'd be close to this anyway (as far as time/money goes): http://tcwtech.com/safety_trim.html#features Cheers, Stein -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Jeffrey Skiba Sent: Saturday, September 14, 2013 2:31 PM Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th --> Sorry for the bad specs, let me try again Functions: Press a momentary switch device turns on release same switch device turns off (even if shorter than the below set time) Press same switch and hold for more than x time say 2 or 3 seconds (would like that to be adjustable if Possible) the device will only be on for the max set time even if button still held, to get device on again you would have to release button and press again. Do not care if solid state or relay, would probably prefer solid state, ultimately looking for simple and CHEAP to build or buy. This needs to run off 12-14 volts Hope that clears things up ? Jeff. -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Eric M. Jones Sent: Saturday, September 14, 2013 9:10 AM Subject: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th --> > Looking for a circuit that when you press a button powers the device but ....if the button is held on it is only powered for a max setting (say 3 seconds) but this same circuit should stop if the button is released before the 3 seconds. > Jeff. The circuit you want is a momentary push button with a resettable fuse. Preferably solid state. -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones(at)charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=408582#408582 ________________________________ Message 15 ____________________________________ Time: 04:12:28 PM PST US From: Jeffrey Skiba Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th Thanks for the tip, I guess I am not following the layout of the circuit with this device, I see in the data sheet [cid:image001.png@01CEB173.A979CBD0] But not exactly seeing how the push button is in series with the load. Aka if button released then load is turned off before max time on ?? Am I looking at the wrong function for this pre made device? From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectr ic-list-server@matronics.com] On Behalf Of Bob McCallum Sent: Saturday, September 14, 2013 3:19 PM Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you pre ss a button powers th Jeff; Momentary normally open pushbutton in series with a timer which opens the l oad after the preset delay time. Because button is momentary and in series with the load and the timer, it must be held to power the load for any peri od of time. Any time it is released the load loses power. The timer opens t he load after the preset delay even if the button is still maintained. Rele asing the button resets the timer whether or not it has timed out. Provides exactly the functionality you describe. One example of such a time r is Omron H3RN-1 which is available in 12 VDC (also 24 VAC and 24 VDC) and in 2 timing ranges from .1 sec to 10 min OR .1 min to 10 HR. This particul ar timer will switch a resistive load of 3 amps up to 250 Volts. Spec sheet found here; http://tinyurl.com/mruy73u This is a plug in solid state timer with a relay output (SPDT) Bob McC > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list- > server@matronics.com] On Behalf Of Jeffrey S kiba > Sent: Saturday, September 14, 2013 3:31 PM > To: aeroelectric-list@matronics.com > Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you p ress a button > powers th > mailto:jskiba@icosa.net>> > > Sorry for the bad specs, let me try again > > Functions: > Press a momentary switch device turns on release same switch device turns off (even > if shorter than the below set time) > Press same switch and hold for more than x time say 2 or 3 seconds (would like that > to be adjustable if Possible) the device will only be on for the max set time even if > button still held, to get device on again you would have to release butto n and press > again. > Do not care if solid state or relay, would probably prefer solid state, u ltimately looking > for simple and CHEAP to build or buy. > This needs to run off 12-14 volts > > Hope that clears things up ? > > Jeff. > > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list- > server@matronics.com] On Behalf Of Eric M. J ones > Sent: Saturday, September 14, 2013 9:10 AM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: Re: Looking for a circuit that when you press a button > powers th > > --> > > > > > Looking for a circuit that when you press a button powers the device bu t ....if the > button is held on it is only powered for a max setting (say 3 seconds) bu t this same > circuit should stop if the button is released before the 3 seconds. > > Jeff. > > > The circuit you want is a momentary push button with a resettable fuse. P referably > solid state. > > -------- > Eric M. Jones > www.PerihelionDesign.com > 113 Brentwood Drive > Southbridge, MA 01550 > (508) 764-2072 > emjones(at)charter.net > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=408582#408582 > > > > > > > > > > > > > _- > == > ====== > - The AeroElectric-List Email Forum - > _- > == > ====== > bsp; - MATRONICS WEB FORUMS - > _- > == > ====== > bsp; - List Contribution Web Site - > bsp; -Matt Dralle, List Admin. > _- > == > ====== > > ________________________________ Message 16 ____________________________________ Time: 06:15:31 PM PST US From: Bob McCallum Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th Jeff; You configure the timer for "delay ON" and wire according to the following. Current flows direct to your device through the NC relay contact but is sourced from the button. Opening the button therefore cuts power. If you continuously hold the button, when the timer times out the relay contacts switch, (opening the NC contact) cutting power to the load. Releasing the button resets the timer, ready for next time. (or cancelling the time if it hasn't timed out yet.) Bob McC _____ From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Jeffrey Skiba Sent: Saturday, September 14, 2013 7:11 PM Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th Thanks for the tip, I guess I am not following the layout of the circuit with this device, I see in the data sheet But not exactly seeing how the push button is in series with the load. Aka if button released then load is turned off before max time on ?? Am I looking at the wrong function for this pre made device? From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Bob McCallum Sent: Saturday, September 14, 2013 3:19 PM Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you press a button powers th Jeff; Momentary normally open pushbutton in series with a timer which opens the load after the preset delay time. Because button is momentary and in series with the load and the timer, it must be held to power the load for any period of time. Any time it is released the load loses power. The timer opens the load after the preset delay even if the button is still maintained. Releasing the button resets the timer whether or not it has timed out. Provides exactly the functionality you describe. One example of such a timer is Omron H3RN-1 which is available in 12 VDC (also 24 VAC and 24 VDC) and in 2 timing ranges from .1 sec to 10 min OR .1 min to 10 HR. This particular timer will switch a resistive load of 3 amps up to 250 Volts. Spec sheet found here; http://tinyurl.com/mruy73u This is a plug in solid state timer with a relay output (SPDT) Bob McC > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list- > server@matronics.com] On Behalf Of Jeffrey Skiba > Sent: Saturday, September 14, 2013 3:31 PM > To: aeroelectric-list@matronics.com > Subject: RE: AeroElectric-List: Re: Looking for a circuit that when you press a button > powers th > > > Sorry for the bad specs, let me try again > > Functions: > Press a momentary switch device turns on release same switch device turns off (even > if shorter than the below set time) > Press same switch and hold for more than x time say 2 or 3 seconds (would like that > to be adjustable if Possible) the device will only be on for the max set time even if > button still held, to get device on again you would have to release button and press > again. > Do not care if solid state or relay, would probably prefer solid state, ultimately looking > for simple and CHEAP to build or buy. > This needs to run off 12-14 volts > > Hope that clears things up ? > > Jeff. > > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list- > server@matronics.com] On Behalf Of Eric M. Jones > Sent: Saturday, September 14, 2013 9:10 AM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: Re: Looking for a circuit that when you press a button > powers th > > --> > > > > Looking for a circuit that when you press a button powers the device but ....if the > button is held on it is only powered for a max setting (say 3 seconds) but this same > circuit should stop if the button is released before the 3 seconds. > > Jeff. > > > The circuit you want is a momentary push button with a resettable fuse. Preferably > solid state. > > -------- > Eric M. Jones > www.PerihelionDesign.com > 113 Brentwood Drive > Southbridge, MA 01550 > (508) 764-2072 > emjones(at)charter.net > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=408582#408582 > > > > > > > > > > > > > _- > == > ====== > - The AeroElectric-List Email Forum - > _- > == > ====== > bsp; - MATRONICS WEB FORUMS - > _- > == > ====== > bsp; - List Contribution Web Site - > bsp; -Matt Dralle, List Admin. > _- > == > ====== > > ====================== ; - The AeroElectric-List Email Forum - vigator to browse st Un/Subscription, ay Browse, Chat, FAQ, p> ://www.matronics.com/Navigator?AeroElectric-List">http://www.matronics.com/N avigator?AeroElectric-List ====================== ; - MATRONICS WEB FORUMS - via the Web Forums! ://forums.matronics.com">http://forums.matronics.com ====================== ; - List Contribution Web Site - support! ; -Matt Dralle, List Admin. ://www.matronics.com/contribution">http://www.matronics.com/contribution ====================== ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.