Sunday, January 8, 2012

PSoC3 Hardware - Quick and Dirty

(Part 2 of this post,PSoC3 Hardware - Quick and Dirty - Fab & Testing. )

One boring sunday morning,I decide to throw together no frills,basic PSoC3 hardware,that could be truly home manufactured,unlike my last attempt.Done in under 2 hours with some bad shortcuts,I decided to call this a Quick and Dirty version.I think this should be do-able with the traditional toner transfer method on a double sided copper clad board.

A few notes on the design:
-P15[0] and [1] have not been routed out.
-Currently,the chip pads are just long enough (and maybe shorter than they need to be for those new to SMD work),so you might need to bend the pins on the chip inwards and then solder,for an easier fit.
-There is no protection on the USB power lines,so beware.
-There is no reverse polarity protection over the unregulated input "VIN".
-There is no dedicated programming header for the MiniProg3,so that something that you've to connect with _short_ single wire connectors.(short because those lines will be in high frequency data lines,min. 1.5Mhz.)

A few notes on fabrication:
-The LEDs need to soldered on both ends,so they shouldn't be inserted fully flush with the board surface.
-The 2 10uF capacitors need not be soldered on both ends,since a connected via is provided for each,which will need to be done.
-There are no vias beneath the chip,and only 2 vias are position critical.
-There are no components on the bottom layer.
-Feel free to increase the via diameter,I've kept it to eagle's defaults.
-Dont make those holes beneath the miniUSB connector.I couldnt find a MiniUSB connector without those holes in a reliable and marked pinout,so I've left it that way.
The design files are made in EAGLE V5.8.0 and you may find them in my 4shared account,I'll upload them soon.

Any mistakes,suggestions,criticism or your experiences making this or similar hardware are most welcome in the comments :-)

This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

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