---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 10/15/11: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:29 AM - Re: [Spam] AeroElectric-List Digest: 17 Msgs - 10/14/11 (K Fohringer) 2. 12:49 AM - Re: Re: [Spam] AeroElectric-List Digest: 17 Msgs - 10/14/11 (Andrew Zachar) 3. 05:05 AM - Re: Ameri-King AK-450 vs ACK E-10 Remote Control Panel... (bob noffs) 4. 07:57 AM - Battery Charge Information (Paul McAllister) 5. 09:46 AM - Re: Battery Charge Information (Robert L. Nuckolls, III) 6. 09:53 AM - Re: Re: Halogen bulbs with wig wag circuitry....failure mode (David Lloyd) 7. 10:42 AM - Re: Battery Charge Information (Paul McAllister) 8. 02:19 PM - SL30 serial output stream (ploucandco) 9. 02:55 PM - Re: Battery Charge Information (Robert L. Nuckolls, III) 10. 06:05 PM - MegaSquirt family of engine controllers (David) ________________________________ Message 1 _____________________________________ Time: 12:29:10 AM PST US From: "K Fohringer" Subject: AeroElectric-List: RE: [Spam] AeroElectric-List Digest: 17 Msgs - 10/14/11 ________________________________ Message 2 _____________________________________ Time: 12:49:54 AM PST US Subject: Re: AeroElectric-List: RE: [Spam] AeroElectric-List Digest: 17 Msgs - 10/14/11 From: Andrew Zachar Hey kfohringer@usa.net, the last few weeks, I have been getting some "no content" emails from you through the list. Gmail is usually pretty good for aeroelectric emails, though. Any ideas? __ Andrew Zachar andrew.d.zachar@gmail.com On Oct 15, 2011, at 2:26 AM, "K Fohringer" wrote: > > ________________________________ Message 3 _____________________________________ Time: 05:05:41 AM PST US Subject: Re: AeroElectric-List: Ameri-King AK-450 vs ACK E-10 Remote Control Panel... From: bob noffs matt, been there but not with an elt. i would replace the elt transmitter to match your panel or, if you are sticking to the same transmitter i would make a very nice unobtrusive plate to cover your large hole and put the smaller one thru the plate. if by magic the hole has healed, skip all this [never worked for me]/ bob noffs On Mon, Oct 10, 2011 at 11:53 AM, Matt Dralle wrote: > > > > > Greetings Listers, > > I have an RV-6 with an ACK E-01 ELT unit and the small Remote Control Panel > (RCP) unit. Last month, I completely replaced the instrument panel in the > airplane and when I removed the ELT's RCP, I noticed that one of the > mounting holes was broken off. > > I had another ELT on the shelf for another project and so I grabbed the RCP > from it and designed a hole in the new instrument panel for it. The hole > for this RCP was about twice the height of the hole for the RCP from the > E-01 but appeared to be exactly the same as far as make and connector hole. > > Well, I didn't really put two and two together at the time but the E-01 is > from ACK Technologies, and the RCP from the other unit is an Ameri-King > AK-450. Except for the difference in vertical size the two RCP's look > exactly the same and accept the same RJ-11 connector. Both have a Red and a > Black button and a single Red LED. Both take a 3 volt battery. > > But here's the bummer, after I put everything back together this weekend, > it turns out that the new RCP will NOT turn the E-01 on/off. If I plug the > original E-01 RCP in to the same RJ-11 wire, it does turn the E-01 on/off, > so the wiring and E-01 are fine. It just seems that the internal wiring of > the two different RCP's is slightly different. > > The bigger bummer is that now I have a large hole in my panel for the RCP > that doesn't work, so I have to figure something out. The original-sized > RCP won't fit because its too small and the panel hole is too big. > > Can anyone lend any advice on the situation? Surely others have run into > this before. > > Thanks! > > Matt Dralle > > > - > Matt "Red Dawg" Dralle > RV-8 #82880 N998RV "Ruby Vixen" > http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log > http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log > http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel > Status: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... > > ________________________________ Message 4 _____________________________________ Time: 07:57:29 AM PST US From: Paul McAllister Subject: AeroElectric-List: Battery Charge Information Hi All,=0A=0AI need to build a battery charger to charge 3 AGM batteries wi red in series.- These are 12 + 12 + 4 volts. From the manufacturers data sheets I given to understand that the charge cycle is 2.4 to 2.5v per cell and the float cycle is 2.26 to 2.3v per cell.=0A=0AI would like to build a battery charger with some "smarts" in it that =0Awill switch over to a floa t charge mode at the appropriate time and I would like to understand when t o switch from charge to float.- From my reading of http://batteryuniversi ty.com/learn/article/charging_the_lead_acid_battery it looks like the chang e from charge to float occurs at 9 hours.=0A=0AI know that there are many c ommercial chargers that do this and I was wondering is the change from char ge to float time based or is it done by measuring voltage / current paramet ers ?=0A=0AThanks,- Paul=0A ________________________________ Message 5 _____________________________________ Time: 09:46:18 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Battery Charge Information At 09:53 AM 10/15/2011, you wrote: >Hi All, > >I need to build a battery charger to charge 3 AGM batteries wired in >series. These are 12 + 12 + 4 volts. From the manufacturers data >sheets I given to understand that the charge cycle is 2.4 to 2.5v >per cell and the float cycle is 2.26 to 2.3v per cell. > >I would like to build a battery charger with some "smarts" in it >that will switch over to a float charge mode at the appropriate time >and I would like to understand when to switch from charge to >float. From my reading of >http://batteryuniversity.com/learn/article/charging_the_lead_acid_battery >it looks like the change from charge to float occurs at 9 hours. Sorta . . . what's your technology of choice? Analog jelly beans or digital? >I know that there are many commercial chargers that do this and I >was wondering is the change from charge to float time based or is it >done by measuring voltage / current parameters ? They vary. If you've got a lot of time, the easiest is to apply constant current equal to 1/10 of the array's a.h. capacity and watch the voltage. When the voltage reaches 2.5 v/cell, start a timer for some 'top off' cycle . . . say two hours. Then drop to a maintenance voltage that is just a tad higher than the open circuit. For 12v batteries, this is about 13.0 volts so shoot for 2.2 volts per cell. Real easy to do with a micro-controller if you know how to herd the bytes. A little harder with jelly-beans but doable. Here's the Schumacher 1562 profile. http://www.aeroelectric.com/Pictures/Curves/schumacher_3.jpg It might be that you could 'jeep' a Schumacher 1562 electronics to do your task by fiddling with some scaling resistors and increasing the charge source voltage. Bob . . . ________________________________ Message 6 _____________________________________ Time: 09:53:58 AM PST US From: "David Lloyd" Subject: Re: AeroElectric-List: Re: Halogen bulbs with wig wag circuitry....failure mode .....again, Bob, I appreciate the insight you gave this matter. Some interesting results you found for the keep alive current needs being that the current requirement is nearly 50% of the operating current but at low power. The DC to DC for the low voltage stage is an interesting idea.... I am going to run this next set of bulbs with the vertically oriented filaments and keep closer tabs on the time to failure..... If the same short life, then it is time to use your idea or move on the next generation of lighting system. Thanks, David ++++++++++++++++++++++++++++++++++++++++++++++ ----- Original Message ----- From: "Robert L. Nuckolls, III" Sent: Friday, October 14, 2011 12:52 PM Subject: Re: AeroElectric-List: Re: Halogen bulbs with wig wag circuitry....failure mode > > > >> >>Funny, I did not know that the halogen environment still included tungsten >>filaments. I was assuming, some other mixture of metal was the basis for >>these brighter lamps. > > It's my assumption that they're still tungsten. > A quick look at Wikipeda > > http://en.wikipedia.org/wiki/Halogen_lamps > > didn't suggest any 'new' materials. > > You bring up an interesting option...to keep the lamp filaments in > their flexible or ductile stage while in any none use state. I wonder > what level of current would be needed for that in a 12 - 14 v. system. > > The POWER needed is quite low but the current > is substantial due to the large positive temperature > coefficient of lamp resistance. I just took a couple > 14v halogen lamps to the bench and was able to get > the first signs of visible light (tiny red glow) at > about 1.5 volts. However, the current draw was a > substantial portion of rated current at full voltage. > One example: A lamp I tested gave me first visible > light at 1.5V and 1.7A for a total of about 2.6W. > This lamp was rated at 55W at 14V or 3.9A. > > This says that the resistor-diode technique described > in the 'Connection would be terribly inefficient. But > if you've got a fat alternator and some place to > let the heat dump out . . . the technique may be > practical . . . and low cost. > > The obvious solution is to use a 2 t0 2.5v DC-DC > converter. There are a number of commercial off the > shelf products. Many such devices can be purchased > through the industrial surplus houses for a reasonable > price. Alternatively, you can do your own DC-DC buck > converter. There are a number of design tools > on the 'net that will assist in component selection. > The nice thing about it is that output ripple > voltage can be pretty high. Light bulbs don't care. > You WILL want to consider EMC filtering as these > devices operate in the 0.1 to 1.0 MHz range and > would be pretty noisy. > > The fast-turn solution might be to use an LED > driver like the Buck Puck 2100 mA device > > http://www.ledsupply.com/0a009-d-v-2100.php > > > throttled down through the dimming input to > get you a barely visible light output in a dark > hangar. EMC questions apply here too. The neat > thing about DC to DC conversion is efficiency. > Something like the Buck-Puck should be 85% efficient > or better. A 2.5 watt keep warm system for a 55w > lamp would only need 3W or so from the bus. > > Another plus of the Buck Pucks is that they're > rated for up to 32 volts operating voltage. > PLENTY of headroom for observing DO-160 surge > requirements in a 14v system. > > And, an option would have to be planned in the case of an alternator > failure to cut the background lamp current. Thanks, > > You bet. Of course, things light landing lights > might drive from the main bus which would be down > during battery only ops anyhow. If you've got > battery left over on short final, then bring the > main bus back up and use the landing light. > > The keepwarm circuit is a great mitigation > of inrush current too. > > > Bob . . . > > > ________________________________ Message 7 _____________________________________ Time: 10:42:58 AM PST US From: Paul McAllister Subject: Re: AeroElectric-List: Battery Charge Information Bob,=0A=0AThanks for your thoughts.- I had planned to build it with a PIC Micro.--=0A=0APaul=0A=0A=0A=0A________________________________=0AFrom: "Robert L. Nuckolls, III" =0ATo: aeroelectr ic-list@matronics.com=0ASent: Saturday, October 15, 2011 11:42 AM=0ASubject : Re: AeroElectric-List: Battery Charge Information=0A=0A--> AeroElectric-L ist message posted by: "Robert L. Nuckolls, III" =0A=0AAt 09:53 AM 10/15/2011, you wrote:=0A> Hi All,=0A> =0A> I need t o build a battery charger to charge 3 AGM batteries wired in series.- The se are 12 + 12 + 4 volts. From the manufacturers data sheets I given to und erstand that the charge cycle is 2.4 to 2.5v per cell and the float cycle i s 2.26 to 2.3v per cell.=0A> =0A> I would like to build a battery charger w ith some "smarts" in it that will switch over to a float charge mode at the appropriate time and I would like to understand when to switch from charge to float.- From my reading of http://batteryuniversity.com/learn/article /charging_the_lead_acid_battery it looks like the change from charge to flo at occurs at 9 hours.=0A=0A- Sorta . . . what's your technology of choic e? Analog=0A- jelly beans or digital?=0A=0A=0A> I know that there are ma ny commercial chargers that do this and I was wondering is the change from charge to float time based or is it done by measuring voltage / current par ameters ?=0A=0A- They vary. If you've got a lot of time, the easiest=0A - is to apply constant current equal to 1/10 of the=0A- array's a.h. capacity and watch the voltage. When=0A- the voltage reaches 2.5 v/cell, start a timer for=0A- some 'top off' cycle . . . say two hours. Then=0A - drop to a maintenance voltage that is just a tad higher=0A- than th e open circuit. For 12v batteries, this is=0A- about 13.0 volts so shoot for 2.2 volts per cell.=0A=0A- Real easy to do with a micro-controller if you=0A- know how to herd the bytes. A little harder with=0A- jelly -beans but doable. Here's the Schumacher=0A- 1562 profile.=0A=0Ahttp://w ww.aeroelectric.com/Pictures/Curves/schumacher_3.jpg=0A=0A- It might be that you could 'jeep' a Schumacher=0A- 1562 electronics to do your task by fiddling with=0A- some scaling resistors and increasing the charge=0A ________________________________ Message 8 _____________________________________ Time: 02:19:08 PM PST US Subject: AeroElectric-List: SL30 serial output stream From: "ploucandco" Hello all, I am looking for an extract of the SL30 serial output stream. It should be something like this one: $PMRRV21817??:BB $PMRRV22V17052 $PMRRV23V16548B $PMRRV24V08458D $PMRRV25VISLE 0A $PMRRV28E4?PMBF $PMRRV21817??:BB $PMRRV22V17052 $PMRRV23V16548B If someone with an SL30 can hook up his PC and give me a few seconds of the data output stream, I would appreciate. I am trying to emulate an SL30 to get the output of an ADF on a Dynon D10A HSI as bearing pointer. Thanks, Jacques. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=355146#355146 ________________________________ Message 9 _____________________________________ Time: 02:55:52 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Battery Charge Information At 12:38 PM 10/15/2011, you wrote: >Bob, > >Thanks for your thoughts. I had planned to build it with a PIC Micro. aha! great! if you'd post your hardware proposal sketches perhaps we could collaborate together and perhaps inspire others to rise to the occasion of their own ideas. I think the PICs are here to stay . . . Bob . . . //// (o o) ===========o00o=(_)=o00o======== < Go ahead, make my day . . . > < show me where I'm wrong. > ================================ ________________________________ Message 10 ____________________________________ Time: 06:05:12 PM PST US From: David Subject: AeroElectric-List: MegaSquirt family of engine controllers Have any of you knowledgeable guys evaluated the MS systems? They sound wonderful to me, as a programmer, but I have so little knowledge of electronics and circuitry I'd like to get an expert's take on them. it would be ideal if y'all could comment on one of the systems that control spark, squirt, and everything. :) Thanks, David Merchant (no, I'm really not trying to be facetious. I intend on using this in my Mustang II, with Ford engine. I'm still trying to learn how to apply Bob's book to my application.) -- If you're an American, just say NO to the Obamanation, to socialism, and get rid of Soros. ...democracy and a republic can function only in a firm partnership with morality and religion. -- John Adams. Indeed. Same should be said for ANY type of gubmnt ------------------------------------------------------------------------------------- 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.