In car power supply

[Dave Morrill]

>From what voltage to what?  800mA at what voltage?

I'm assuming 12v to something.

Best
	Dave
DRAINVILLE, Michel wrote:
> 
> Hi everyone. This is my first post to this list. I'm building a
> dynamometer and performance analyser for my car, using a Atmel 8952.
> I'm now in the power supply section and faced to the heat dissipation
> problem. I'm not using a DC-DC converter because of the price.
> I tried to use a 7809 and 7805 together and also a 7805 with a bypass
> transistor but both setups generate a lot of heat. (7 to 8 watts).
> My circuit draws about 800ma including LCD and backlight.
> 
> I was curious to know what do you use to power your EFI management
> systems or how you handle heat.
> 
> thanks.
> Michel Drainville
> drainville at paprican.ca
> 
> PS: please answer privately because I'm not a member of the list.
>     (my project is not related to EFI)