AVR-Chat

--- In AVR-Chat@yahoogroups.com, "alwelch93021" <alwelch@a...> wrote:
> 
> I also recommend ferrite beads on  the incomming power and ground 
> lines.  I found this helps with EMC filtering.
> 

good idea!

On a similar unit (one that I am reverse-engineering), I ran it on 
an old (pre-electronics) car with copper wire ignition wires.  The 
electronics worked perfectly with the engine off, but went INSANE 
with the engine running.  I had to put one of those inductive 
filters (the ones that look like a small transformer) in the power 
line to the electronics.

It still glitched majorly when a nearby big fat relay and its 
solenoid would fire.  I had to make sure never to use THAT circuit 
when running the electronics.  I might have been able to put a diode 
and cap across the relay, but I was not sure if it would work and I 
never got to it.


-Tony