Re: more on weird resets

Peter wrote:
> 
> 
> On Sun, 31 Jul 2005, David McNab wrote:
> 
>> Hi all,
>>
>> I dug out my old trusty veroboard-based proto board (with header pin
>> blocks for running all the ports out to breadboard). Try as I might, I
>> can't reproduce the random reset problem on that board.
>>
>> Guess I might need to do a whole new board, with all the ground traces
>> flooding out to eat all the unused board surface.
>>
>> Any further suggestions?

what kind of decoupling capacitor are you using on the VDD supply, and 
how far away?


> 
> 
> Put a 100 ohm resistor between your current circuit and MCLR and add a 
> 220pF cap between MCLR and VDD directly at the chip. Also add a 5V6 
> zener between VDD and VSS.

A piece of wire would work better.
john