Bill of Materials (Analog Board)
This page lists the parts needed for the optional Analog frontend for the 6-12 bit Board.
This board is plugged into the 6, 8 or 12 bit board and adds support for a limited range of computers with analog RGB or YUV output. It provides an external 6 way IDC connector so that cables for different computers can be easily swapped and it will also work with any 3 bit TTL computer like the BBC so you don't have to remove the board to use those computers as well.
Latest schematics are here:
Latest gerbers are here:
Front:
Back:
Fitting:
| Part Description | Supplier | Quantity | Part Ref | Min Order | Notes |
|---|---|---|---|---|---|
| 470R 0805 Resistor | RS 679-1428 | 1 off | R1 | 50 | |
| 75R 0805 Resistor | RS 679‑1673 | 3 off | R9-11 | 50 | |
| 1K 0805 Resistors | RS 740‑9063 | 3 off | R2-4 | 50 | |
| 10K 0805 Resistors | RS 740‑9072 | 1 off | R5 | 50 | |
| 47K 0805 Resistors | RS 905‑2928 | 3 off | R6-8 | 50 |
| Part Description | Supplier | Quantity | Part Ref | Min Order | Notes |
|---|---|---|---|---|---|
| 100nf 0805 Multilayer Ceramic Capacitor | RS 464‑6688 | 5 off | C1-C5 | 50 | working voltage ≥ 10V |
| 10uF 0805 Multilayer Ceramic Capacitor | RS 846‑7313 | 4 off | C6-9 | 50 | working voltage ≥ 10V |
| Part Description | Supplier | Quantity | Part Ref | Min Order | Notes |
|---|---|---|---|---|---|
| MAX9144ESD+ | Farnell 2518925 | 2 off | U1,2 | 1 | SOIC-14 (Previously used MAX9108ESD+) |
| 74LVC4066D | RS 051-0493 | 1 off | U3 | 10 | SOIC-14 |
| MAX5259EEE+ | Farnell 2514646 | 1 off | U4 | 1 | QSOP-16 |
| MCP1754ST-3302 | RS 755‑9521 | 1 off | U5 | 5 | SOT23A package |
| TS5A3159ADBVR | Farnell 3118293 | 1 off | U6 | 1 | SOT23A package |
| Schottky diode MBR130LSFT1G | Farnell 2463407 | 1 off | D1 | 5 | SOD-123FL package |
There is an optional extra IC on the underside of the pcb (U7 - also MAX9144ESD+) this is not normally fitted
NOTE: Earlier versions of this BOM used MAX9108ESD+ instead of MAX9144ESD+ for U1,U2 & U7. All three parts must be the same type if you are fitting U7 on an existing board.
| Part Description | Supplier | Quantity | Part Ref | Min Order | Notes |
|---|---|---|---|---|---|
| Samtec SSW-106-02-T-D-RA 2x6 way 0.1" female right angle PCB Header | Farnell 2779580 | 1 off | P1 | 1 | |
| Samtec TLW-104-06-T-S 1x4 way male header | RS 198-2815 | 1 off | P2 | 1 | Long side of pins goes in PCB |
| Samtec TLW-101-06-T-S 1x1 way male header | RS 198-2806 | 2 off | P6, P7 | 1 | P6 & P7 should be trimmed flush with the plastic to act as support/spacers (see photo) |
| 6 Way IDC header (vertical) | Farnell 2215302 | 1 off | P4 | 1 |
Note after trimming their pins as mentioned above, P6 and P7 act as feet and rest on top of the Pi zero's camera connector to stop P2 on the analog board from falling out of it's socket if you push down on the six way header which might result in the bottom of the analog board shorting against components on the Pi zero.
| Part Description | Supplier | Quantity | Min Order | Notes |
|---|---|---|---|---|
| 6 Way IDC header | Farnell 2215245 | 1 off | 1 | |
| 6 way Ribbon cable | Farnell 2628361 | 1 off | 1 | |
| 6 way DIN plug | Farnell 2787094 | 1 off | 1 |
The computer end of the cable is obviously system specific. The 6-pin DIN connector listed above is suitable for the Amstrad CPC, BBC and Electron.
Instead of using the 6 way IDC header (P4), there is space for a molex picoblade connector (P3) and you can buy a premade cable with such connectors on both ends which can be cut in half to provide two picoblade to bare end cables which can be connected to 6 way DIN or other suitable connectors as above.
| Part Description | Supplier | Quantity | Part Ref | Min Order | Notes |
|---|---|---|---|---|---|
| Molex 53048-0610 Picoblade Connector | Farnell 1012260 | 1 off | P3 | 1 | |
| Molex 15134-0606 Picoblade Cable Assembly | RS | 1 off | 1 |