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
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Subject: | Why does a master switch turn off devices? |
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
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Subject: | Re: 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 <jskiba@icosa.net>
> *To:* "aeroelectric-list@matronics.com" <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 ....
>
> <jskiba@icosa.net <mailto:jskiba@icosa.net>>
>
> 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
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Subject: | Re: 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
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Subject: | Re: Alternator Whine in Radio Transmit |
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
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Subject: | Re: 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 <jskiba@icosa.net>
>> *To:* "aeroelectric-list@matronics.com"
>> <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 ....
>>
>> <jskiba@icosa.net <mailto:jskiba@icosa.net>>
>>
>> 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
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Subject: | 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 7
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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 <bob.nuckolls@aeroelectric.com>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
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Subject: | Re: 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
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Subject: | 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
--> <emjones@charter.net>
> 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
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|
Subject: | 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 <jskiba@icosa.net> 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
>
> --> <emjones@charter.net>
>
>
>> 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
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Subject: | 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
--> <enginerdy@gmail.com>
..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 <jskiba@icosa.net> wrote:
> --> <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 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
>
> --> <emjones@charter.net>
>
>
>> 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
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Subject: | 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
>
> --> <emjones@charter.net>
>
>
> > 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
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|
Subject: | testing; no reply needed |
Message 14
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|
Subject: | 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
--> <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 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
--> <emjones@charter.net>
> 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
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|
Subject: | 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-aeroelect
ric-list-server@matronics.com> [mailto:owner-aeroelectric-list-
> server@matronics.com<mailto:server@matronics.com>] On Behalf Of Jeffrey S
kiba
> Sent: Saturday, September 14, 2013 3:31 PM
> To: aeroelectric-list@matronics.com<mailto:aeroelectric-list@matronics.co
m>
> 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-aeroelect
ric-list-server@matronics.com> [mailto:owner-aeroelectric-list-
> server@matronics.com<mailto:server@matronics.com>] On Behalf Of Eric M. J
ones
> Sent: Saturday, September 14, 2013 9:10 AM
> To: aeroelectric-list@matronics.com<mailto:aeroelectric-list@matronics.co
m>
> Subject: AeroElectric-List: Re: Looking for a circuit that when you press
a button
> powers th
>
> --> <emjones@charter.net<mailto:emjones@charter.net>>
>
>
> > 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<http://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
INDEX | Back to Main INDEX |
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|
Subject: | 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
>
> --> <emjones@charter.net>
>
>
> > 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.
> _-
> ==
> ======
>
>
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