---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 02/13/20: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:52 AM - Re: Charge Pump (Robert L. Nuckolls, III) 2. 06:24 AM - Re: Charge Pump (Earl Schroeder) 3. 08:12 AM - Re: Charge Pump (Robert L. Nuckolls, III) 4. 08:53 AM - Re: Charge Pump (Jeff Luckey) 5. 09:43 AM - Re: Charge Pump (Robert L. Nuckolls, III) 6. 09:49 AM - Re: Charge Pump (C&K) 7. 03:09 PM - Re: dimmer dim50-14 (DANIEL PELLETIER) 8. 04:42 PM - Re: dimmer dim50-14 (user9253) ________________________________ Message 1 _____________________________________ Time: 05:52:18 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Charge Pump At 04:59 AM 2/10/2020, you wrote: >On 2020-02-06, at 20:51, Jeff Luckey wrote: > > > I'm wondering how difficult it would be to build a 14-to-28 volt > charge-pump power supply. It would need to supply about 7 amps. You threw me a curve ball with the 'charge pump' thingy . . . but after following the thread it's apparent that you're needing a 12 -> 24 volt up-converter. A 'charge pump' is a particular kind of energy converter limited to very low power systems. The critter you're looking for is more like this. https://tinyurl.com/rjxn3eo perhaps a little 'beefier' than you need but already robustly packaged and convenient to wire up. Bob . . . ________________________________ Message 2 _____________________________________ Time: 06:24:19 AM PST US From: Earl Schroeder Subject: Re: AeroElectric-List: Charge Pump Is the input ground isolated from the output? > On Feb 13, 2020, at 7:57 AM, Robert L. Nuckolls, III wrote: > > =EF=BB At 04:59 AM 2/10/2020, you wrote: >> On 2020-02-06, at 20:51, Jeff Luckey wrote: >> >> > I'm wondering how difficult it would be to build a 14-to-28 volt charge -pump power supply. It would need to supply about 7 amps. > > You threw me a curve ball with the 'charge pump' > thingy . . . but after following the thread > it's apparent that you're needing a 12 -> 24 > volt up-converter. A 'charge pump' is a particular > kind of energy converter limited to very low > power systems. > > The critter you're looking for is more like this. > > https://tinyurl.com/rjxn3eo > > perhaps a little 'beefier' than you need > but already robustly packaged and convenient > to wire up. > > > Bob . . . ________________________________ Message 3 _____________________________________ Time: 08:12:09 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Charge Pump At 08:22 AM 2/13/2020, you wrote: >Is the input ground isolated from the output? Probably not. It's difficult to find such devices with 'isolated' or 'floating' outputs. They exist and generally in low power (couple watts) versions. Examples: https://tinyurl.com/rplxlsk Bob . . . ________________________________ Message 4 _____________________________________ Time: 08:53:11 AM PST US From: Jeff Luckey Subject: Re: AeroElectric-List: Charge Pump Bob, So what is the basic circuit design in the 12-24v step-up supply you refere nce on EBay?=C2- An inverter, transformer, rectifier? -Jeff On Thursday, February 13, 2020, 06:01:17 AM PST, Robert L. Nuckoll s, III wrote: At 04:59 AM 2/10/2020, you wrote: On 2020-02-06, at 20:51, JeffLuckey wrote: > I'm wondering how difficult it would be to build a 14-to-28 voltcharge-pu mp power supply.=C2- It would need to supply about 7amps. =C2- You threw me a curve ball with the 'charge pump' =C2- thingy . . . but after following the thread =C2- it's apparent that you're needing a 12 -> 24 =C2- volt up-converter.=C2- A 'charge pump' is a particular =C2- kind of energy converter limited to very low =C2- power systems. =C2- The critter you're looking for is more like this. https://tinyurl.com/rjxn3eo =C2- perhaps a little 'beefier' than you need =C2- but already robustly packaged and convenient =C2- to wire up. =C2- Bob . . . ________________________________ Message 5 _____________________________________ Time: 09:43:17 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Charge Pump At 10:51 AM 2/13/2020, you wrote: >Bob, > >So what is the basic circuit design in the 12-24v step-up supply you >reference on EBay? An inverter, transformer, rectifier? > >-Jeff The vast majority will use the configuration posted by Rowland. This is the lowest parts count, easiest to implement. The number and style of filter components on inputs and outputs will vary but the basic step-up architecture is constant. Isolated supplies require a transformer. They'll be more expensive. Bob . . . ________________________________ Message 6 _____________________________________ Time: 09:49:31 AM PST US Subject: Re: AeroElectric-List: Charge Pump From: C&K I run a 28volt T&B off a cheap ($4.?) ebay 12 to 24 volt adjustable converter. Think it was rated at about 3 amps which is way more than needed. It has common grounds. It's mounted in a little plastic box and taped to a wire bundle under the dash. I have not noticed any interference with the gps or radio. Weighs next to nothing. Ken On 13/02/2020 9:22 AM, Earl Schroeder wrote: > Is the input ground isolated from the output? > ________________________________ Message 7 _____________________________________ Time: 03:09:08 PM PST US From: DANIEL PELLETIER Subject: Re: AeroElectric-List: dimmer dim50-14 Hi, Today I bought a 3 volts led to remplace the light in my Westach OAT. At the shop, they suggest me to put an resistance on my 12 volts circuit. I instal led the dimmer with potentiometer to control my instrument lights. Does I ne ed to install the resistance or not? I enclosed a picture of my dimmer. Daniel ________________________________ Message 8 _____________________________________ Time: 04:42:00 PM PST US Subject: AeroElectric-List: Re: dimmer dim50-14 From: "user9253" Assuming that the dimmer is capable of outputting 14 volts at full brightness, then yes, I would install a 560 ohm resistor in series with the LED to prevent damaging it. If the LED does not get bright enough, you call always replace the reistor with a smaller value. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=494799#494799 ------------------------------------------------------------------------------------- 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.