[Diy_efi] Data Logger CPU schematic and C for review

[Ian Molton]

Bernd Felsche wrote:
> On Sunday 04 February 2007 12:16, Jean Belanger wrote:
> 
>> What would also be interesting would be the ability to directly
>> drive analog gauges. Since a lot of people lose some or all of the
>> dash gauges when going to a non-OEM MCU, it would be nice to be
>> able to restore this functionality. I don't know exactly how this
>> would be done and it certainly is dependent on the vehicle but
>> some type of PWM or stepper motor controller would cover some
>> cases.
> 
> Reminds me...
> 
> I've toyed with the idea of using RC-servos to do the needle
> positioning on stock gauges.

they arent very fast unless you spend $$$ on them (although they have a 
fair bit of torque so you could gear them up with a linkage or so - at 
the cost of accuracy.

arent most car guages milliameters anyway? a D/A converter should be 
able to run something like that...