Computerman29
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Here we go again!!!
I drew the original PicKit 3 Schematic into Eagle. It is identical to the original in all but the following respects:
1) Test points have been omitted.
2) Memory chips have been substituted with SST parts
3) Q2 and Q3 have been substituted with Central Semiconductor parts.
4) The MOSFET'S have been substituted with ON Semiconductor parts.
Learning from my PicKit 2 project, I made my own library to avoid the MOSFET fiasco. (What a mess that was!!!) The subed parts could be easily changed back. I only changed them because I am on a very low budget, I can't get samples of Zetex or Fairchild, and Atmel is a pain to get samples. (At least in the USA)
As with the PK2 project, it would probably be only a few dollars more (maybe even cheaper) to buy an original, but I like to build things. :lol:
I have not started the layout yet. I wanted to get some feedback first. This will be much more of a challenge than the PK2, but still "do-able". It is done in all SMT devices, and the processor is .5mm pitch TQFP. All but the IC's could be done in TH, with the IC's soldered on the bottom. That would make it a bit easier to build and it would still be single-sided. The attached zip contains the schematic and the Eagle library of most of the parts used.
Opinions? Critiques? Suggestions?
I drew the original PicKit 3 Schematic into Eagle. It is identical to the original in all but the following respects:
1) Test points have been omitted.
2) Memory chips have been substituted with SST parts
3) Q2 and Q3 have been substituted with Central Semiconductor parts.
4) The MOSFET'S have been substituted with ON Semiconductor parts.
Learning from my PicKit 2 project, I made my own library to avoid the MOSFET fiasco. (What a mess that was!!!) The subed parts could be easily changed back. I only changed them because I am on a very low budget, I can't get samples of Zetex or Fairchild, and Atmel is a pain to get samples. (At least in the USA)
As with the PK2 project, it would probably be only a few dollars more (maybe even cheaper) to buy an original, but I like to build things. :lol:
I have not started the layout yet. I wanted to get some feedback first. This will be much more of a challenge than the PK2, but still "do-able". It is done in all SMT devices, and the processor is .5mm pitch TQFP. All but the IC's could be done in TH, with the IC's soldered on the bottom. That would make it a bit easier to build and it would still be single-sided. The attached zip contains the schematic and the Eagle library of most of the parts used.
Opinions? Critiques? Suggestions?