---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 03/04/05: 21 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:17 AM - EFIS Backup Battery and fuseblocks - Attn Bob (Mike & Lee Anne Wiebe) 2. 06:20 AM - Re: EFIS Backup Battery and fuseblocks - (Charlie Kuss) 3. 06:40 AM - Re: EFIS Backup Battery and fuseblocks - (Robert L. Nuckolls, III) 4. 07:05 AM - Re: Master alarm circuit (Jim Stone) 5. 07:37 AM - Re: Rotax Alternator (Jim Butcher) 6. 09:15 AM - Re: Master alarm circuit (D Wysong) 7. 09:43 AM - Re: Master alarm circuit (Marcos Della) 8. 10:42 AM - Re: Question about dimmer circuits and annunicators... (Marcos Della) 9. 10:59 AM - Re: Master alarm circuit (James Redmon) 10. 11:13 AM - Flap Motor Warning (Sigmo@aol.com) 11. 11:13 AM - Re: Master alarm circuit (rv-9a-online) 12. 11:18 AM - Re: EFIS Backup Battery and fuseblocks - Attn Bob (John Schroeder) 13. 11:25 AM - Re: WD-40 as Contact Cleaner (Dww0708@aol.com) 14. 11:44 AM - Re: Master alarm circuit (rv-9a-online) 15. 03:12 PM - Re: Master alarm circuit (James Redmon) 16. 03:53 PM - Master alarm circuit (Roy Wheaton) 17. 03:54 PM - Re: Master alarm circuit (rv-9a-online) 18. 06:14 PM - Re: APU vs battery (Speedy11@aol.com) 19. 06:36 PM - OBAM Configuration () 20. 07:06 PM - Re: Re: APU vs battery (Wayne Sweet) 21. 10:03 PM - Re: Re: APU vs battery (B Tomm) ________________________________ Message 1 _____________________________________ Time: 03:17:36 AM PST US From: "Mike & Lee Anne Wiebe" Subject: AeroElectric-List: EFIS Backup Battery and fuseblocks - Attn Bob --> AeroElectric-List message posted by: "Mike & Lee Anne Wiebe" Bob - we haven't talked in about four years. Your designs are flying well in our Falco. Thanks for the advice back then, and here's a question for the new project. I very much like the low voltage warning system and the setup in your recently reference schematic http://aeroelectric.com/articles/lvwarn/9021-620.pdf . This setup is exactly to my needs. However, one thing is getting complicated and I wonder if you have any thoughts. I really like the fuseblock idea instead of acres of breakers. But this design requires four buses, so we're starting to get "acres of buses". When you divvy up the load this way, there are not many circuits on each bus. What would be ideal is one common mechanical bus, with the ability to segregate it electrically. Obviously nobody is likely to have it set up the way I want, but perhaps yours (or other products?) can be "cut" and fed from both ends, so that each mechanical block is good for two electrical buses? Thoughts? Mike ________________________________ Message 2 _____________________________________ Time: 06:20:50 AM PST US From: Charlie Kuss Attn Bob Subject: Re: AeroElectric-List: EFIS Backup Battery and fuseblocks - Attn Bob --> AeroElectric-List message posted by: Charlie Kuss Attn Bob At 06:16 AM 3/4/2005, you wrote: >--> AeroElectric-List message posted by: "Mike & Lee Anne Wiebe" > > >Bob - we haven't talked in about four years. Your designs are flying >well in our Falco. Thanks for the advice back then, and here's a >question for the new project. > >I very much like the low voltage warning system and the setup in your >recently reference schematic >http://aeroelectric.com/articles/lvwarn/9021-620.pdf . This setup is >exactly to my needs. However, one thing is getting complicated and I >wonder if you have any thoughts. > >I really like the fuseblock idea instead of acres of breakers. But this >design requires four buses, so we're starting to get "acres of buses". >When you divvy up the load this way, there are not many circuits on each >bus. What would be ideal is one common mechanical bus, with the ability >to segregate it electrically. Obviously nobody is likely to have it set >up the way I want, but perhaps yours (or other products?) can be "cut" >and fed from both ends, so that each mechanical block is good for two >electrical buses? Thoughts? > >Mike Mike, Bussman makes a newer style of fuse block which allows 2 power sources. They differ from the standard style Bob prefers, in that the power output wires exit from the rear of the fuse block. See http://order.waytekwire.com/IMAGES/M37/catalog/217_063 http://www.mihdirect.biz/ I purchased mine from MIH. Charlie Kuss ________________________________ Message 3 _____________________________________ Time: 06:40:35 AM PST US From: "Robert L. Nuckolls, III" Attn Bob Subject: Re: AeroElectric-List: EFIS Backup Battery and fuseblocks - Attn Bob --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" Attn Bob At 06:16 AM 3/4/2005 -0500, you wrote: >--> AeroElectric-List message posted by: "Mike & Lee Anne Wiebe" > > >Bob - we haven't talked in about four years. Your designs are flying >well in our Falco. Thanks for the advice back then, and here's a >question for the new project. > >I very much like the low voltage warning system and the setup in your >recently reference schematic >http://aeroelectric.com/articles/lvwarn/9021-620.pdf . This setup is >exactly to my needs. However, one thing is getting complicated and I >wonder if you have any thoughts. > >I really like the fuseblock idea instead of acres of breakers. But this >design requires four buses, so we're starting to get "acres of buses". >When you divvy up the load this way, there are not many circuits on each >bus. What would be ideal is one common mechanical bus, with the ability >to segregate it electrically. Obviously nobody is likely to have it set >up the way I want, but perhaps yours (or other products?) can be "cut" >and fed from both ends, so that each mechanical block is good for two >electrical buses? Thoughts? I'm a bit lost. The fuse blocks are available in sizes from 6 to 20 slots. A group of say 4, 6-slot fuseblocks is only slightly larger than a pair 12 slot devices. Modifying these devices as you suggest is difficult and fraught with risk. At one time, I tried to split a 20-slot fuseblock into two segments and install an e-bus normal feed diode inside the fuseblock. Time consuming and marginally successful. If you're cramped for space such that the narrow range of selection from B&C (6, 10, 20-slot) don't permit an optimized bussing arrangement, then I'll suggest you seek suppliers of the intermediate sizes on the 'net. When I first offered those devices from our website catalog, they were difficult to find "in the wild" . . . that was 8 years ago and they're offered by many suppliers in all sizes. Bob . . . ________________________________ Message 4 _____________________________________ Time: 07:05:51 AM PST US From: "Jim Stone" Subject: Re: AeroElectric-List: Master alarm circuit --> AeroElectric-List message posted by: "Jim Stone" That's what I am looking for D. Jim When can you start on it? ----- Original Message ----- From: "D Wysong" Subject: Re: AeroElectric-List: Master alarm circuit > --> AeroElectric-List message posted by: D Wysong > > > my usual work mode assumes that the "computer" is physically built > > before it gets to me... > > Understood, although some days I'd still prefer an old HeathKit. :-) I > hope I didn't insult you with the cartoons. > > Theory aside, perhaps you'd be willing to specify a few things for a > potential developer? > -- how many 'contact closures' do you want to monitor? > -- how many of those need to be compared (canopy latch vs. throttle fwd, > gear up vs. throttle aft, etc.)? > -- single 'master alarm' for everything? Perhaps a master (that grabs > your attention) with a separate caution/advisory panel that IDs the > specific trigger?? > > D > > --------------- > do not archive > > > > > > ________________________________ Message 5 _____________________________________ Time: 07:37:39 AM PST US From: "Jim Butcher" Subject: AeroElectric-List: Re: Rotax Alternator --> AeroElectric-List message posted by: "Jim Butcher" Bob, I notice that Z-16 has the control on the "C" wire. My Rotax install manual states "never sever connection between terminal "C" and "+B+ of regulator e.g. by removal of a fuse". Likewise the Rotax supplied wiring diagram shows "R", "+B" and "C" all tied together. This makes me think the senerio described by others where the OV module makes "C" go to zero and drives the alt to full on is probably correct. Perhaps Z-16 needs edited. I have wired my install per Z13 where the 2 blue wires correspond to the 2 yellow wires off the Rotax; my tied together "R", "+B" and "C" correspond to Z13 Red and case ground corresponds to Z13 Blk. Do you see any problem with this? With this configuration with the Aux Alt switch off, the Rotax regulator does not have a battery to sense bus voltage. Will this be a problem? Or will the capacitor take a charge and represent the 14 V battery? Is a 15 WV capacitor ok here or will there likely be transients that require a higher voltage capacitor? Thanks Jim Butcher Europa A185 N241BW ________________________________ Message 6 _____________________________________ Time: 09:15:08 AM PST US From: D Wysong Subject: Re: AeroElectric-List: Master alarm circuit --> AeroElectric-List message posted by: D Wysong Already started, Jim. Is your logic similar to what James mentioned (e.g. - if Switch A is open and Switch B is closed then sound the alarm)? How many contact/switch closures are you monitoring? D ----- On Fri, 4 Mar 2005 10:04:11 -0500, Jim Stone wrote: > --> AeroElectric-List message posted by: "Jim Stone" > > That's what I am looking for D. > Jim > When can you start on it? ________________________________ Message 7 _____________________________________ Time: 09:43:10 AM PST US Subject: RE: AeroElectric-List: Master alarm circuit From: "Marcos Della" --> AeroElectric-List message posted by: "Marcos Della" Ok, the circuit I have is for twelve annunciators hard wired for 5 ground active and 6 hot active. The last is tied to the gear up and down lights (to provide a gear transition light)... I have the circuit board and parts list. I'm finishing up the schematic on electonic copy and should have my second version PCBs back from the etcher by monday for test. Just curious (I'm running out of PCB space without a massive increase in cost) would it be worth it to make the inputs "selectable" (meaning you can use either a GND or + to activate the LAMP) (almost doubles the required components) and also to install a "Master Caution" light? The problem I have with the master caution is that of all my annunciators, only about 5 of them are actually cautions whereas the others are indicators of things like "landing light", "taxi light", "pitot heat", etc... I suppose I could install a header w/jumpers to identify which ones are master caution and which ones aren't This is actually an easy circuit (and I just finished the mod for the dimmer circuit, thanks for the pointers guys) but does have a few space constraints. Also geting a 337 signed off is going to be interesting for those with certified aircraft (I have that, and once I install the new circuit, I'll have to do it again... ugh) Lastly, many people I have talked to want the dang thing built, not too many homebrew hackers like me out there :-) Would it be worth it to anyone if I could produce a few of these circuits for their aircraft? Price is probably going to be somewhere around $100 for the boards and stuff (better in a case, but everything costs a little more :-) My indicators can be seen in this picture... http://www.geekstyle.net/gallery/N5877C-Instrument-Panel-Repairs/IMG_0314 This is a really old picture, (shows stuff that isn't even in the panel anymore) I should have newer pictures up this evening (I've been a little lax in the photo part of the installation)... Marcos ________________________________ From: owner-aeroelectric-list-server@matronics.com on behalf of Jim Stone Subject: Re: AeroElectric-List: Master alarm circuit --> AeroElectric-List message posted by: "Jim Stone" That's what I am looking for D. Jim When can you start on it? ----- Original Message ----- From: "D Wysong" Subject: Re: AeroElectric-List: Master alarm circuit > --> AeroElectric-List message posted by: D Wysong > > > my usual work mode assumes that the "computer" is physically built > > before it gets to me... > > Understood, although some days I'd still prefer an old HeathKit. :-) I > hope I didn't insult you with the cartoons. > > Theory aside, perhaps you'd be willing to specify a few things for a > potential developer? > -- how many 'contact closures' do you want to monitor? > -- how many of those need to be compared (canopy latch vs. throttle fwd, > gear up vs. throttle aft, etc.)? > -- single 'master alarm' for everything? Perhaps a master (that grabs > your attention) with a separate caution/advisory panel that IDs the > specific trigger?? > > D > > --------------- > do not archive > > ________________________________ Message 8 _____________________________________ Time: 10:42:13 AM PST US Subject: RE: AeroElectric-List: Question about dimmer circuits and annunicators... From: "Marcos Della" --> AeroElectric-List message posted by: "Marcos Della" Absolutely! I'm AutoCAD LT 2005 myself... mdella@cstone.com -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Fiveonepw@aol.com Subject: Re: AeroElectric-List: Question about dimmer circuits and annunicators... --> AeroElectric-List message posted by: Fiveonepw@aol.com In a message dated 3/2/05 11:12:30 PM Central Standard Time, mdella@cstone.com writes: > Should I just leave it tied > to power and not bother with worrying about the annunicators being too > bright at night >>> Hi Marcos- IMHO you definately need BRT/DIM capability, especially if your annunciator is mounted direct center of vision. I used zener diodes and a BRT/DIM toggle switch on my 10 function LED annunciator and it works well- you can play with the zener diodes and LED resistor values to achieve the levels you desire. If you can do AutoCAD (I'm R14) I can send you a copy of my circuits, if you'd like... Mark Phillips ________________________________ Message 9 _____________________________________ Time: 10:59:23 AM PST US From: "James Redmon" Subject: Re: AeroElectric-List: Master alarm circuit --> AeroElectric-List message posted by: "James Redmon" Sounds like you have just about what I'm looking for. > --> AeroElectric-List message posted by: "Marcos Della" > > > Ok, the circuit I have is for twelve annunciators hard wired for 5 ground > active and 6 hot active. The last is tied to the gear up and down lights > (to provide a gear transition light)... Sounds about right...but positive feed indicator lights are rather simple in nature and in my case, have already been installed. I'm really only interested in the "ground" triggered warning lights/alarm circuit. In fact, I think that a indicator bank like you have is a great idea if designed into the panel, but for retrofits like this one, many of the individual lights are already in place - the alarm portion however, is not. > Just curious (I'm running out of PCB space without a massive increase in > cost) would it be worth it to make the inputs "selectable" (meaning you > can use either a GND or + to activate the LAMP) (almost doubles the > required components) and also to install a "Master Caution" light? The > problem I have with the master caution is that of all my annunciators, > only about 5 of them are actually cautions whereas the others are > indicators of things like "landing light", "taxi light", "pitot heat", > etc... I suppose I could install a header w/jumpers to identify which > ones are master caution and which ones aren't In a matrixed design, there would have to be a way to select the trigger inclusion for master alarm. I would think that several positive inputs could be routed through your device to drive lights only very easily. Negative logic could too, as the PCB would just be in the middle of trigger switch, light and power source. It would help builder creat a nexus of all indicator and alarm wiring inputs...then a condolidated output to individual or banked indicator lights, and the master alarm. If there were 5x5 neg/pos input triggers, with or without individual indicator lights, that could be selectable for master alarm or not...that would be the ticket. I also think that a seperate, ground logic based indicator circuit for throttle/gear warn and transition/lock indicators would be preferable. However, remember that some aircraft don't have 3 retractable gear, so I would think the position indicator and "squat or lock" circuits might need to be seperate. For my immediate need, I just need the alarm circuit and the allowance for multiple (2-3) triggers. Canopy open and gear warns are all I'm looking at for the moment but a more versital configuration would be needed for a "product". > Lastly, many people I have talked to want the dang thing built, not too > many homebrew hackers like me out there :-) Would it be worth it to > anyone if I could produce a few of these circuits for their aircraft? > Price is probably going to be somewhere around $100 for the boards and > stuff (better in a case, but everything costs a little more :-) I'm willing to build the circuit myself...I just don't possess the knowledge to design it, or print PCBs. I could probably solder board it if I have a schematic and parts list. Sounds like you're on the right track here. James Redmon Berkut #013 N97TX http://www.berkut13.com ________________________________ Message 10 ____________________________________ Time: 11:13:17 AM PST US From: Sigmo@aol.com Subject: AeroElectric-List: Flap Motor Warning --> AeroElectric-List message posted by: Sigmo@aol.com Caution: If you are using a Commercial Aircraft products Flap motor DO NOT break one of the up or down roller limit switches. The V3L-3 Honeywell/Micro switch has been discontinued and after trying extensively to locate another switch that will fit the D145 flap motor I am unable to find one of the right dimensions that will work on this design. Commercial Aircraft will not sell you one of their stock. Honeywell will not sell you one of their stock. The authorized suppliers will sell you one of these $5 switches for $50 to $70 dollars which will be shipped from Honeywell. An expensive lesson learned about using loctite and trying to remove the screw..... P.S. I bought the only two I could find on the Honeywell dealers inventory list that were less than $50 and they were $28 each. Mike Sigman Zodiac 601XL N7092N ________________________________ Message 11 ____________________________________ Time: 11:13:41 AM PST US From: rv-9a-online Subject: Re: AeroElectric-List: Master alarm circuit --> AeroElectric-List message posted by: rv-9a-online Good luck with this, Marcos. I hope my suggestions have helped. If anyone is looking for a 4-channel version of such a device (easy to make 8, 12, 16...), then you go to http://www3.telus.net/aviation/vx Look for the IL-4A. The .pdf document has all of the technical information, including a schematic. The IL-4A has programmable inputs (high sense, low sense) and the ability to monitor reversing functions (flap motors, gear motors). Although it only drives four lamps, it can sense up to eight inputs, allowing sharing of lamps. Vern Little, RV-9A Marcos Della wrote: >--> AeroElectric-List message posted by: "Marcos Della" > >Ok, the circuit I have is for twelve annunciators hard wired for 5 ground active and 6 hot active. The last is tied to the gear up and down lights (to provide a gear transition light)... > >I have the circuit board and parts list. I'm finishing up the schematic on electonic copy and should have my second version PCBs back from the etcher by monday for test. > >Just curious (I'm running out of PCB space without a massive increase in cost) would it be worth it to make the inputs "selectable" (meaning you can use either a GND or + to activate the LAMP) (almost doubles the required components) and also to install a "Master Caution" light? The problem I have with the master caution is that of all my annunciators, only about 5 of them are actually cautions whereas the others are indicators of things like "landing light", "taxi light", "pitot heat", etc... I suppose I could install a header w/jumpers to identify which ones are master caution and which ones aren't > >This is actually an easy circuit (and I just finished the mod for the dimmer circuit, thanks for the pointers guys) but does have a few space constraints. Also geting a 337 signed off is going to be interesting for those with certified aircraft (I have that, and once I install the new circuit, I'll have to do it again... ugh) > >Lastly, many people I have talked to want the dang thing built, not too many homebrew hackers like me out there :-) Would it be worth it to anyone if I could produce a few of these circuits for their aircraft? Price is probably going to be somewhere around $100 for the boards and stuff (better in a case, but everything costs a little more :-) > >My indicators can be seen in this picture... >http://www.geekstyle.net/gallery/N5877C-Instrument-Panel-Repairs/IMG_0314 > >This is a really old picture, (shows stuff that isn't even in the panel anymore) I should have newer pictures up this evening (I've been a little lax in the photo part of the installation)... > >Marcos > > >________________________________ > >From: owner-aeroelectric-list-server@matronics.com on behalf of Jim Stone >To: aeroelectric-list@matronics.com >Subject: Re: AeroElectric-List: Master alarm circuit > > >--> AeroElectric-List message posted by: "Jim Stone" > >That's what I am looking for D. >Jim >When can you start on it? >----- Original Message ----- >From: "D Wysong" >To: >Subject: Re: AeroElectric-List: Master alarm circuit > > > > >>--> AeroElectric-List message posted by: D Wysong >> >> >> >>>my usual work mode assumes that the "computer" is physically built >>>before it gets to me... >>> >>> >>Understood, although some days I'd still prefer an old HeathKit. :-) I >>hope I didn't insult you with the cartoons. >> >>Theory aside, perhaps you'd be willing to specify a few things for a >>potential developer? >>-- how many 'contact closures' do you want to monitor? >>-- how many of those need to be compared (canopy latch vs. throttle fwd, >>gear up vs. throttle aft, etc.)? >>-- single 'master alarm' for everything? Perhaps a master (that grabs >>your attention) with a separate caution/advisory panel that IDs the >>specific trigger?? >> >>D >> >>--------------- >>do not archive >> >> >> >> > > > > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. ________________________________ Message 12 ____________________________________ Time: 11:18:10 AM PST US Subject: Re: AeroElectric-List: EFIS Backup Battery and fuseblocks - Attn Bob From: "John Schroeder" --> AeroElectric-List message posted by: "John Schroeder" On Fri, 4 Mar 2005 06:16:07 -0500, Mike & Lee Anne Wiebe wrote: > I really like the fuseblock idea instead of acres of breakers. But this > design requires four buses, so we're starting to get "acres of buses". > When you divvy up the load this way, there are not many circuits on each > bus. What would be ideal is one common mechanical bus, with the ability > to segregate it electrically. Obviously nobody is likely to have it set > up the way I want, but perhaps yours (or other products?) can be "cut" > and fed from both ends, so that each mechanical block is good for two > electrical buses? Thoughts? Mike - Bussman makes a series of fuse blocks now that do just what you want. We installed two blocks, but each is electrically segregatged into 20 & 8 fuses per sections. This is overkill for us but we had intended to have the two smaller busses feed a FADEC system.Try looking at their 15710 series on their website. Also, David Schwartzenruber is stocking some of these blocks. I don't have his email address handy, nor his website. When I get home next week, I could send you a .pdf file of their drawings and a picture of our installed blocks. Cheers, John -- Using Opera's revolutionary e-mail client: http://www.opera.com/m2/ ________________________________ Message 13 ____________________________________ Time: 11:25:06 AM PST US From: Dww0708@aol.com Subject: Re: AeroElectric-List: WD-40 as Contact Cleaner --> AeroElectric-List message posted by: Dww0708@aol.com After the penetrates evaporate from the WD 40 I actually leaves a sticky residue that attracts moisture. Documented ________________________________ Message 14 ____________________________________ Time: 11:44:48 AM PST US From: rv-9a-online Subject: Re: AeroElectric-List: Master alarm circuit --> AeroElectric-List message posted by: rv-9a-online James, are your switches wired with normally open and normally closed contacts (like lever 'microswitches')? If so, it makes it very easy to produce the alarms you want without fancy logic circuits. For example, if you used the switches so that they were 'off' when actuated (i.e. the switches are 'open' when canopy is open and the throttle is advanced), then you could just wire the switches together and connect them to an input on the IL-4A lamp controller, programmed for active high sense. (see http://www3.telus.net/aviation/vx). You'd need to wire in a 'pull-up' resistor to make this work. Thanks, Vern Little James Redmon wrote: >--> AeroElectric-List message posted by: "James Redmon" > >Sounds like you have just about what I'm looking for. > > > >>--> AeroElectric-List message posted by: "Marcos Della" >> >> >>Ok, the circuit I have is for twelve annunciators hard wired for 5 ground >>active and 6 hot active. The last is tied to the gear up and down lights >>(to provide a gear transition light)... >> >> > >Sounds about right...but positive feed indicator lights are rather simple in >nature and in my case, have already been installed. I'm really only >interested in the "ground" triggered warning lights/alarm circuit. In >fact, I think that a indicator bank like you have is a great idea if >designed into the panel, but for retrofits like this one, many of the >individual lights are already in place - the alarm portion however, is not. > > > >>Just curious (I'm running out of PCB space without a massive increase in >>cost) would it be worth it to make the inputs "selectable" (meaning you >>can use either a GND or + to activate the LAMP) (almost doubles the >>required components) and also to install a "Master Caution" light? The >>problem I have with the master caution is that of all my annunciators, >>only about 5 of them are actually cautions whereas the others are >>indicators of things like "landing light", "taxi light", "pitot heat", >>etc... I suppose I could install a header w/jumpers to identify which >>ones are master caution and which ones aren't >> >> > >In a matrixed design, there would have to be a way to select the trigger >inclusion for master alarm. I would think that several positive inputs >could be routed through your device to drive lights only very easily. >Negative logic could too, as the PCB would just be in the middle of trigger >switch, light and power source. It would help builder creat a nexus of all >indicator and alarm wiring inputs...then a condolidated output to individual >or banked indicator lights, and the master alarm. If there were 5x5 neg/pos >input triggers, with or without individual indicator lights, that could be >selectable for master alarm or not...that would be the ticket. > >I also think that a seperate, ground logic based indicator circuit for >throttle/gear warn and transition/lock indicators would be preferable. >However, remember that some aircraft don't have 3 retractable gear, so I >would think the position indicator and "squat or lock" circuits might need >to be seperate. > >For my immediate need, I just need the alarm circuit and the allowance for >multiple (2-3) triggers. Canopy open and gear warns are all I'm looking at >for the moment but a more versital configuration would be needed for a >"product". > > > >>Lastly, many people I have talked to want the dang thing built, not too >>many homebrew hackers like me out there :-) Would it be worth it to >>anyone if I could produce a few of these circuits for their aircraft? >>Price is probably going to be somewhere around $100 for the boards and >>stuff (better in a case, but everything costs a little more :-) >> >> > >I'm willing to build the circuit myself...I just don't possess the knowledge >to design it, or print PCBs. I could probably solder board it if I have a >schematic and parts list. > >Sounds like you're on the right track here. > >James Redmon >Berkut #013 N97TX >http://www.berkut13.com > > > > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. ________________________________ Message 15 ____________________________________ Time: 03:12:17 PM PST US From: "James Redmon" Subject: Re: AeroElectric-List: Master alarm circuit --> AeroElectric-List message posted by: "James Redmon" > James, are your switches wired with normally open and normally closed > contacts (like lever 'microswitches')? If so, it makes it very easy to > produce the alarms you want without fancy logic circuits. Thanks, and this is true. However, the problem here is that I'm not looking just for a buzzer and blinking light. I'm actually looking for a resetable alarm circuit. One that is triggered by the manual switch logic, sounds the alarm (light and buzzer) and has a momentary mute (or acknowledge) button. It would need to continue to illuminate the warning light as long as the condition exists but silence the buzzer. If a different alarm condition occurs at the same time, it should re-engage the buzzer. Once the alarm condition is removed, then the circuit resets (light off, buzzer off). Unfortunately, I can't get that from just manual switches, and/or a light bank. My fall back position is a simple switch/light/buzzer combo that will use a manual on/off switch for the buzzer...no logic, not idiot proof, not optimum. James Redmon Berkut #013 N97TX http://www.berkut13.com ________________________________ Message 16 ____________________________________ Time: 03:53:17 PM PST US From: Roy Wheaton Subject: AeroElectric-List: Master alarm circuit --> AeroElectric-List message posted by: Roy Wheaton The type of alarm you are referring to is not a major design project. We have created several types of monitoring systems for motorcycles, race vehicles, watercraft, construction equipment, and light aircraft that are close to what you are looking for. Modern microprocessor and software allow you to create a device that will monitor several parameters, and give programmable visual, audible, and spoken responses based on pre-selected events. For example, we created a system for a rally race car that would monitor oil pressure, charging system voltage, engine coolant temperature, transmission coolant temperature and engine speed. If a problem occurred, the microprocessor would alert the driver and co-driver by selecting the correct message and "speaking" it through the intercom system. A woman's voice was used because it has been determined by various research groups that it produces less stress in the operator / pilot. Configurable outputs were provided for external devices such as flashing v/s steady LEDs, piezo alarms, etc. I have a unit that has 16 configurable inputs (battery or ground activated) and is capable of sounding unique sounds for different events. It also has 6 analog inputs for monitoring charging system voltage, Oil pressure, etc. Our first product was designed for use on motorcycles. It monitors the charging system and oil pressure switch and sounds a falling sound if the charging system falls below a preset level, a rising tone if the voltage is too high, and a pulsating tone if oil pressure fails. You can see that unit at http://www.eguardsystems.com If you have any questions, or would like a solution tailored to your unique requirements, please feel free to contact me. ________________________________ Message 17 ____________________________________ Time: 03:54:43 PM PST US From: rv-9a-online Subject: Re: AeroElectric-List: Master alarm circuit --> AeroElectric-List message posted by: rv-9a-online Right. What you are looking for is a bit more sophisticated. You can't just turn off the alarm buzzer because you may miss a second alarm. This functionality is in the Rocky Mountain Micromonitor, but I assume that you are not using it or don't have room for it. I'll keep my eyes open for something more appropriate. Vern James Redmon wrote: >--> AeroElectric-List message posted by: "James Redmon" > > > >>James, are your switches wired with normally open and normally closed >>contacts (like lever 'microswitches')? If so, it makes it very easy to >>produce the alarms you want without fancy logic circuits. >> >> > > >Thanks, and this is true. However, the problem here is that I'm not looking >just for a buzzer and blinking light. I'm actually looking for a resetable >alarm circuit. One that is triggered by the manual switch logic, sounds the >alarm (light and buzzer) and has a momentary mute (or acknowledge) button. >It would need to continue to illuminate the warning light as long as the >condition exists but silence the buzzer. If a different alarm condition >occurs at the same time, it should re-engage the buzzer. Once the alarm >condition is removed, then the circuit resets (light off, buzzer off). > >Unfortunately, I can't get that from just manual switches, and/or a light >bank. > >My fall back position is a simple switch/light/buzzer combo that will use a >manual on/off switch for the buzzer...no logic, not idiot proof, not >optimum. > >James Redmon >Berkut #013 N97TX >http://www.berkut13.com > > > > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. ________________________________ Message 18 ____________________________________ Time: 06:14:28 PM PST US From: Speedy11@aol.com Subject: AeroElectric-List: Re: APU vs battery --> AeroElectric-List message posted by: Speedy11@aol.com In a message dated 3/3/2005 6:52:44 AM Eastern Standard Time, aeroelectric-list-digest@matronics.com writes: Are tiny APU's reasonable for tiny airplanes?--- Eric, You crack me up. : ) You are causing me to stretch mentally. The APU idea may have merit. Stan Sutterfield ________________________________ Message 19 ____________________________________ Time: 06:36:06 PM PST US From: Subject: AeroElectric-List: OBAM Configuration --> AeroElectric-List message posted by: AeroElectric-List message previously posted by: "Robert L. Nuckolls, III" <<....skip.....But make no mistake about it folks, your OBAM airplane's configuration belongs to YOU and no one else.....skip.....Bob . . .>> 3/4/2005 Hello Bob Nuckolls, Your statement above could mislead people. The Special Airworthiness certificate issued to each amateur built experimental aircraft includes Operating Limitations for that aircraft. The Operating Limitations will include the following sentence: "After completion of phase I flight testing, unless appropriately equipped for night and/or instrument flight in accordance with 91.205, this aircraft is to be operated under VFR, day only." The FAA policy regarding this sentence is: 1) If the aircraft is flown day VFR only it does not need to meet any of the instrumentation or equipment requirements of FAR Sec. 91.205. 2) If the aircraft is flown VFR at night it must comply with the requirements of FAR Sec. 91.205 (b) and (c). 3) If the aircraft is flown IFR it must comply with the requirements of FAR Sec. 91.205 (b), (c), and (d). These three FAR paragraphs list the instrumentation and equipment required for day VFR, night VFR, and IFR respectively. In addition: 1) FAR Sec. 91.207 lists flight conditions under which aircraft must have ELT's. 2) FAR Sec. 91.215 lists flight conditions under which aircraft must have transponders. Amateur built experimental aircraft are not excused from either of these two equipment requirements in those applicable flight conditions OC ________________________________ Message 20 ____________________________________ Time: 07:06:18 PM PST US From: "Wayne Sweet" Subject: Re: AeroElectric-List: Re: APU vs battery --> AeroElectric-List message posted by: "Wayne Sweet" One more comment; my friend, a retired FedEx 747 captain told me when I mentioned about this thread, that the APU on the 747 would frequently quit because of lack of oil, or some other maintenance issue. It only had two gauges, which I have forgotten what they were, but he stated the gauges did not indicate much about the status of the APU, other than it was running or not running. The 747 also had batteries, a 24 volt system. Now if a 747 (ahhh, that qualifies as a BIG airplane) has batteries, my little P.A. two seater will live it's life without an APU. However this thread did provides some giggles. Wayne ----- Original Message ----- From: Subject: AeroElectric-List: Re: APU vs battery > --> AeroElectric-List message posted by: Speedy11@aol.com > > In a message dated 3/3/2005 6:52:44 AM Eastern Standard Time, > aeroelectric-list-digest@matronics.com writes: > Are tiny APU's reasonable for tiny airplanes?--- > Eric, > You crack me up. : ) > You are causing me to stretch mentally. > The APU idea may have merit. > Stan Sutterfield > > > ________________________________ Message 21 ____________________________________ Time: 10:03:49 PM PST US From: B Tomm Subject: RE: AeroElectric-List: Re: APU vs battery --> AeroElectric-List message posted by: B Tomm how about this... www.basicaircraft.com Bevan -----Original Message----- From: Speedy11@aol.com [SMTP:Speedy11@aol.com] Subject: AeroElectric-List: Re: APU vs battery --> AeroElectric-List message posted by: Speedy11@aol.com In a message dated 3/3/2005 6:52:44 AM Eastern Standard Time, aeroelectric-list-digest@matronics.com writes: Are tiny APU's reasonable for tiny airplanes?--- Eric, You crack me up. : ) You are causing me to stretch mentally. The APU idea may have merit. Stan Sutterfield