8419Re: [tracker2] Re: 5v buck converter?
- Sep 1, 2009For 5vdc 1 amp, I am using a 7805 with a couple of caps -- 0.33 uF
between the the input and ground, a 0.1 uF between the output and
ground -- tied together on a bit of perf board which I place inside
the APO3 power relay box. Or, if not using an APO3 I put the circuit
into a 35mm film container. I don't remember what the total cost was,
but it couldn't have been a lot as I ended up a drawer full of 78XXs.
On 1-Sep-09, at 3:30 PM, gsdatplace wrote:
> --- In firstname.lastname@example.org, Chris Kantarjiev <cak@...> wrote:
>> I'm interested in packing a 5V buck converter into a DE-9 shell, to
>> take 12V in and provide power to
>> the attached GPS - typically 60-80mA, but it would be nice to
>> handle the Nuvi's load of 400mA.
>> Can anyone suggest a simple design or readily available unit?
>> 73 de chris K6DBG
> Simplest and cheapest I've found (and I bought everyone I could)
> Duracell makes a beautifully tiny cigarette lighter to USB charger
> adapter. 12V in, 5Vdc at up to 1A out. I've taken a couple apart
> now, one is mounted inside my OT2 (like I said very small switching
> supply) off the power control output which powers up and down my
> nuvi based on profile switching or remote commands. Picked them up
> for $6.99, I'm sure it must have been a pricing mistake (in my favour)
> Belkin makes a tiny one as well.
Erich J. Ritzmann/VA3XTO
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