This post is related to the thread AT90USBKey Headers. I'm posting this here since it really is AVR related and might see a wider audience.
I scrapped the previous design of an adapter for the AT90USBKEY headers when I realized that it would be difficult to have more than one adapter board next to each other.
Here are jpg's of the latest design. Actually, one adapter PCB (10017-TOP) for J7, J5, and J4 and another (10017-BOT) for J6, J2, and J1 of the AT90USBKEY.
Again, the (Digi-Key # A9AAT-0502E) flex cables are connected from the top of the AT90USBKEY into the bottom of the adapter boards. Or, the flex cables could come out of the bottom of the AT90USBKEY into the top of the adapter boards. The adapter boards are now 2"x0.9".
I was thinking of using www.myropcb.com for these. Can't use batchpcb because of the 6 mil traces required to fit between the pads of the 0.05" connectors.
Here's the price breakdown for 50pc from MyroPCB
(50) PCB $0.36
(1) NRE $58.00
$2.22 per board
The total will be $222 for 50 ea of both the 10017-TOP and 10017-BOT board pair. Note that the cost of 1-sided pcb versus 2-sided is just pennies per board. Single-sided, traces on bottom, no silkscreen, no solder mask doesn't change the price quote much to be significant.
If I can find enough people interested in buying the boards at $5.50 for the pair (envelope and stamp included in the US), I'll place the order. Remember, that a total of 12 pc of the Digi-Key A9AAT-0502E will be required for each board pair. The A9AAT-0502E is a custom made part that will show a quantity of 0 on search and has a fabrication time. Or, I suppose you could use wires to connect between the boards.
Here's a link to the gerber files for each board. TOP and BOT refer to the top and bottom row of headers on the AT90USBKEY that each board is associated with.
I did this on my hobby time. I just want to cover costs of the PCB fabrication. If someone else wants to take the gerbers and make boards, all I ask is that you make them available for cost+shipping to other freaks.
Anyone have any suggestions on a better way to make these available to freaks? Have freaks collaborated on costs for a common project before?