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well, i was thinking about a pdf, but the reason i left it as a PCB is that it will still have the layers... but here it is as a jpg
i think i will attempt a new board, i just wanna make sure everything is good before i do it...
did you watch the video???
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Video is good. When it is finished it would make a good kit.
Dave
Always wear safety glasses while programming.
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Again, I have not used this chip.
The trace I mentioned before was the program trace. But I still think the MCLR part is different than the data sheet, data shows diode going VSS?
Other than that and a few sharp turns, I do not see a problem.
The sharp turn thing also give a real nice place for arcs to show up.
Whats the law? Things in motion want to keep going in the same direction? Even electrons.
Dave
Always wear safety glasses while programming.
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im at work now, but i will have a look at the MCLR diode when i get home... like i said, im just going by what the nuts and volts says for ICSP, it may be wrong for this chip.. and thats exactly why i appreciate youre help... because i have never used this chip before either, so im learning lots as i go..
about breadboarding, is there an easy way to put a PLCC on a breadboard?? without making a board with a header than can be plugged into the breadboard???
when you said "kit" i dont know if you meant selling it, cause im just doing this fur fun, but i guess anything is possible...
i will look at the sharp corners... i know they arent good, but i didnt think it was as big of a deal as it seems....
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If I had a dollar for every one of those magazine articles I've seen that was obviously wrong (well, I'd have about 10 bucks, but the point remains the same).Originally Posted by dragons_fire
It's not as big of a deal as we're making it out to be....but again, it could kick you in the arse in the future...i will look at the sharp corners... i know they arent good, but i didnt think it was as big of a deal as it seems....
P.S. Watched the video...pretty neat stuff...
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i just remembered that the MCLR schematic is also in the stuff that came with my programmer... i should look there too!!!
if i had a dollar for everytime something is going to come back and kick my in the arse, i would be rich!! (at least until i die from the viscious arse kickins!!!)
thanks for the comments on the video. the controller does 128 speeds, so i made it ramp up from 0 to 127 with a pause 20 between each step..
i also get an unbelievable amount of noise when the motors are running.. with both going full speed, i cant even make out the picture on my tv. i think i may need to add some caps to the motors..
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Cap's across the motor may help, but it's probably the result of the frequency of your PWM. What is the freq anyways? Maybe we can help you come up with something a bit higher so you can't hear it (but your dog will go nuts!!!).
Last edited by skimask; - 18th April 2007 at 00:07.
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An adapter is the only way I know to board a PLCC making one should be easy or http://www.arieselec.com/products/18014.pdf
Yes, selling it. Looks like something that would get some interest.
BIG BOT looks like a better snow plow than lawn mower
I think 20 mHz will work, as you say, the motor drivers free up the PIC.
So your a fellow HAM north of the line, cool.
Dave
Always wear safety glasses while programming.
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