16f877 portc.6 & portc.7

[DavyJones]

If I find a mistake, all I gotta do is cut a trace, and install jumpers across whatever via's fix the problems.
Sometimes I've got what looks like thousands of via's, but it works.

I'm glad it's not just me. I don't have allot of experience and I probably don't work on allot of projects but the ones I do no matter how careful I am I end up overlooking something. For this project I completely overlooked the fact the the ttl logic was not going to be enough to drive my 9v siren. Jeeze I know I'm no electrical engineer but what was I thinking!

Thanks again
David

[mackrackit]

I'm glad it's not just me. I don't have allot of experience and I probably don't work on allot of projects but the ones I do no matter how careful I am I end up overlooking something. For this project I completely overlooked the fact the the ttl logic was not going to be enough to drive my 9v siren. Jeeze I know I'm no electrical engineer but what was I thinking!

Thanks again
David

You should see some of my boards. End up looking like a wire-wrap project with a little etching.

[skimask]

You should see some of my boards. End up looking like a wire-wrap project with a little etching.

Prime examples of .... YUK!!!!..... right here...
http://web.ndak.net/jdgrotte/mp3play...rpicsmain.html

[mackrackit]

Mine do not look so bad now.

[DavyJones]

I don't feel so bad either. I guess I only have 2 pins to re-route I should keep my mouth shut hehe.

I think this board actually turned out quite nice considering it's a complte do-it-yourself'er

http://www.jonzilla.com/thebittners/...ures/2007\Pool Alarm Project/

[DavyJones]

http://www.jonzilla.com/thebittners/...arm%20Project/

[skimask]

http://www.jonzilla.com/thebittners/...arm%20Project/

The board looks just fine to me, better than I've ever etched myself (see those earlier pic's?)
Only comment I've got about it is...those 90 degree angles... PCBs and 90 degree angles don't mix, especially if you've got any sort of high frequency running across the traces. Double 45 degree angles back to back with a small chunk of straight line at least twice as long as your trace is wide is MUCH better electrically than a single 90 degree corner. Why does it work? The short and simple answer is that the signal can't bounce back down the same path from which it came. Good enough for me and it's worked since I started doing it.

[BobK]

Since now one else caught it I will say it. Your TRISC = %0000000 should be TRISC=%00000000. That's 8 zeros for the 8 outputs. Your statement only had 7. I'm sure it was a minor detail but it had something to do with portC.7.

HTH,

BobK.

Yep no matter how careful you are with your pcb design, you always miss something. When I worked at a electronics place doing projects for the Navy we were not allowed to check our own work but when you are the only person working on your hobby project, it's kind of hard to have someone else check your work.