Hi all,

I'm looking at putting my first PIC (16F877) project PCB together and I =
was wondering if I could steal some of all your wise experience on doing =
this. All the work I have done so far is using a purchased dev board =
(mikroelektronika EasyPIC).


1) Power Supply

Most of my designs will be based on a 12V ish supply. Whether it be =
automotive or desk based, 12V seems like a good figure. I was planning =
on using a 7805 regulator with a large elec & small ceramic cap in =
parallel on both sides approach. i.e. 47-100uF and a 100nF. And then =
another small cap 10n as close to the IC supply pins as possible. How =
sensitive is a PIC and does this sound about right? I'll also be driving =
the usual LCD and a few LEDs but no motors as yet.

2) Resonator Setup

I bought some three pin resonators in both 4MHz and 20MHz. Do three pin =
ones always have built in caps? or is there an occasion where a three =
pin device (xtal/res?) still needs caps?

3) Reset Circuit

I've seen mentioned on a few design notes about connecting to 'the rest =
of your reset circuit'. Is it common practice to but some form of reset =
button type setup on devices? I have using the guidelines from the notes =
of the programmer I am using and plan to keep the ICSP setup =
(mikroelektronika USB programmer). But all this says is the rest of your =
reset circuit too. I've also seen a few websites that have a 1N4148 in =
parallel with a reset button, but I wasn't sure why?

4) Any other tips of wisdom...


I have to say I'm looking forward to getting my first PIC pcb up and =
running, I've been 'playing' with these little beauties for a while now, =
but it's time to make some real projects come to life!!!


Cheers all

Kev/.
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