gnupic: Re: [gnupic] more on weird resets
Subject:
Re: [gnupic] more on weird resets
From:
John Sheahan ####@####.####
Date:
31 Jul 2005 08:38:37 +0100
Message-Id: <42EC7FF5.8010005@optushome.com.au>
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
