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Registered Member #51
Joined: Thu Feb 09 2006, 04:17AM
Location:
Posts: 263
Anyone care to have a look at the board I designed for a small sstc? Ill be etching tomorrow, and if all works out, I plan on making my pcb file freely available for all to use. Anyone have any suggestions, or see any mistakes?
Edit, I resized my image, so right click and click "view image" to see the whole thing.
Registered Member #58
Joined: Thu Feb 09 2006, 05:40AM
Location: Tri-Cities, Washington, US
Posts: 317
pretty good, but I dont really see anything bringing the 12v over to your 555/hex inverter/ucc's.
Also another note, if you want to make it simpler, I can definately say that the hex inverter is really not needed at all, simply using a ceramic cap in series with the antenna and the two clamping diodes works just as well. But i guess that is just my opinion. anyways, pretty cool.
Oh and also it looks like the silkscreen for the hex inverter/ucc's are backwards. The lettering should be flipped around to show the correct pin 1
Registered Member #51
Joined: Thu Feb 09 2006, 04:17AM
Location:
Posts: 263
Great. Thanks for the suggestions. The 555 and inverter get power from a 7805 that is centered on the big ground rail in the center of the board. I considered not using the inverter chip all together, but i like the idea of having a buffer between the antenna and the UCC's. Thanks for noticing the lettering, Ill be sure to fix it. As for the trace width, thanks for the suggestion but I think I'd like a little room between traces when etching, seeing as I'm using the toner transfer method and results can be hit or miss.
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SSTC board design
