Quick update,
here is the homemade stencil before etching.
http://i.imgur.com/PZuPrZs.jpg?1And here is the soldered board after I fixed the minor issues. The TPS2044 has been bypassed.
http://i.imgur.com/795EYCu.jpg?1The BOM for this one has been reduced to the following:
| ref | value | Qty |
| C1 | 680pF | 1 |
| C2 | 0,01µF | 1 |
| C3 | 100µF | 1 |
| C4 | 0,1µF | 1 |
| C5 | 10µF | 1 |
| C6,C7 | 33pF | 2 |
| C8 | 4,7µF | 1 |
| C9,C10 | 1µF | 2 |
| C11 | 0,1µF | 1 |
| CON1 | USB-MINI-B | 1 |
| D1,D2 | 4148 | 2 |
| IC1 | NE556 | 1 |
| IC2,IC3 | CP2102 | 2 |
| J1 | USB_2 | 1 |
| P1,P2 | CONN_8 | 2 |
| R1 | 1k | 1 |
| R2 | 10k | 1 |
| R3 | 1,5k | 1 |
| R4..R11 | 27 | 8 |
| R12..R15 | 15k | 4 |
| R16 | 2,2k | 1 |
| R17 | 15k | 1 |
| RV1 | 100k | 1 |
| U1,U2 | SN75240 | 2 |
| U3 | TUSB2036 | 1 |
| X1 | 6MHz | 1 |
The definitive board will use one or two CP2108 to allow up to 4 or 8 hashing units.
WOW what a cool thing!!! When are you starting to taking orders! Hahaha but the real question is how much this board can value?
