"hello world" with 18f6680

[dragons_fire]

well, if i get the second one going, i may send it to you if ya want... i really only need one, but its still easier and cheaper to get 2 made...

i have never tried microchips "free" trials before. i may have to do that and try a few of the different PICs.

i can program it, and it draws very little current, so i dont think the power pins are shorted. and if the I/O pins were shorted, i should still have voltage on my pin since im making every pin high.

the only problems i could see from shorting, is if i shorted an i/o to ground, and its pulled too much current. or if mclr is connected to ground or something else it shouldnt be...

[Darrel Taylor]

well, if i get the second one going, i may send it to you if ya want... i really only need one, but its still easier and cheaper to get 2 made...

I'll send it back when I'm done. And you might want to know what's wrong before you do the second one.

i can program it, and it draws very little current, so i dont think the power pins are shorted. and if the I/O pins were shorted, i should still have voltage on my pin since im making every pin high.

the only problems i could see from shorting, is if i shorted an i/o to ground, and its pulled too much current. or if mclr is connected to ground or something else it shouldnt be...

On the right side of the last picture I posted, there are 2 lines.
The bottom one is pointing to a via that is between GND and one of the oscillator pins.
If that ones shorted, it probably won't draw much current, but the oscillator won't work.
And if there's no OSC, then shorts on the other pins won't draw current either, cause they never get turned on.

But again, no way to know without an ohmmeter.
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[dragons_fire]

i checked both osc pins to ground with my meter when i soldered the osc... since it was so small, i checked it to make sure i didnt have any solder bridges on the OSC.

you guys are great though... if it wasnt for your suggestions, i would have given up on it long ago...

[Darrel Taylor]

Ok, well it's up to you.

It's just that I've been looking at it long enough that I'd really like to know what the problem is.

I have a hot air re-work station, oscilliscope DVM's etc.
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[skimask]

Ok, well it's up to you.
It's just that I've been looking at it long enough that I'd really like to know what the problem is.
I have a hot air re-work station, oscilliscope DVM's etc.
<br>

Tin-whisker anyone?

[dragons_fire]

i have an oscilliscope (sorta)!!! i dont know how to use it or if it will even work... but it was fun to play around with... i want to know what the problem is so i can move on with this project...

thats my oscilliscope in the bottom right corner... its an RCA and meant for back in the tube days....



and if you look close on the shelf, you can see treadbot sitting there!!!

[dragons_fire]

i have juast gone over the board quickly, i will do it again tomorrow when i have more time, but i get:

0 ohms between all +5v traces
0 ohms between all gnd traces
30M ohms between all I/O pins and +5V
1M ohm between power and ground
4-12M ohms between all I/O pins and gnd
17M ohm between OSC2 and gnd
12M ohm between OSC1 and gnd
29M ohms between OSC2 and +5v
23M ohms between OSC1 and +5v