alright Jinx, what do you think of this?

I now have a on off switch between the wall transformer +V
and the input to the 7805

and I have a momentary (NO) switch between Vdd and Vss,
to be pressed when the main switch is off, when things are acting strange,
to get a complete reset.

And,
I've asked this before, but I've forgotten now, sorry

but I have a small capacitor between the 7805 +5vdc output and ground,
is this all that is required or a good idea OR what do you recommend here,

the capacitors, filter out noise correct?  Where else do you need to do
this?



thanks,




----- Original Message -----
From: "Jinx" <joecolquitt@CLEAR.NET.NZ>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Sunday, January 19, 2003 2:24 PM
Subject: Re: [pic] : mclr versus cycling the power


> > perhaps he uses a double throw switch, which both disconnects
> > the 7805 from the PIC's Vdd lines and also shorts the PIC's Vdd
> > lines
>
> That's the best way to ensure a power-down reset. Circuits can
> behave oddly (don't I know it !!) if Vdd doesn't go low enough
> when the power switch is turned off before power is re-applied.
> It's recommended in the electrical specs that Vdd reaches Vss
> before power-up, and shorting the Vdd and Vss pins with a switch
> as or after the power supply is disconnected pretty much guarantees
> that
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.