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
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At 04:59 AM 2/10/2020, you wrote:
>On 2020-02-06, at 20:51, Jeff Luckey <jluckey@pacbell.net> 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
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Is the input ground isolated from the output?
> On Feb 13, 2020, at 7:57 AM, Robert L. Nuckolls, III <nuckolls.bob@aeroele
ctric.com> wrote:
>
> =EF=BB At 04:59 AM 2/10/2020, you wrote:
>> On 2020-02-06, at 20:51, Jeff Luckey <jluckey@pacbell.net> 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
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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
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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 <nuckolls.bob@aeroelectric.com> wrote:
At 04:59 AM 2/10/2020, you wrote:
On 2020-02-06, at 20:51, JeffLuckey <jluckey@pacbell.net> 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
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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
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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
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| Subject: | Re: 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
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| Subject: | Re: dimmer dim50-14 |
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
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