2.5 KiB
BOM
| REFERENCE | QUANTITY | DESCRIPTION | PACKAGE | NOTE |
|---|---|---|---|---|
| R1, R2, R3, R4 | 4 | 1K Resistor | through-hole | - |
| R5 | 1 | 220 Resistor | through-hole | - |
| R6 | 1 | 100K Resistor | through-hole | - |
| R7 | 1 | 470 Resistor | through-hole | - |
| D1, D2, D3, D4, D5, D6, D7, D8 | 8 | BAT85 Diode | through-hole | - |
| D9 | 1 | 1N4148 Diode | through-hole | - |
| U1 | 1 | MCP3008 IC | DIP-16 | you can get these from mouser ,adafruit, even ali |
| U2 | 1 | 6N138 IC | DIP-8 | - |
| RV1, RV2, RV3, RV4 | 4 | 1K_LINEAR_POT | ALPHA | tayda ones work although shaft may be too short |
| J1, J2, J3, J4 | 4 | 3.5MM_JACK | THONKICONN | from thonk or 50pc from modular addict |
| J5 | 1 | MIDI_DIN_IN | SD-50BV | mouser |
| J6 | 1 | 1X1_PIN_HEADER | - | - |
| J7 | 1 | RCA_JACK | RCJ-024 | mouser or ali |
| J8 | 1 | 20X2_PIN_HEADER | long stacking header | from adafruit or look for similar on ebay etc |
- | 1 | 20X2_PIN_HEADER | normal female header | these are more common and can be found anywhere
OPTIONAL :
- some long enough screws and spacers note:measure these to hold it together.
- if you want your ic's in sockets you should buy some DIP-8 /16 also now
- if you only want the analog_inputs and not interested in serial_midi, you already have usb midi etc, then you can omit R5, R6, R7, D9, U2 from the BOM - see circuit schematic for details
the reason you need the second 'normal female header' is because on its own the pi3s ethernet port is too high for the gpios to connect with the board. if you are using a piCapture card between the pi and board you will not need this spacing.
BUILD
start with the lowest to place components : resistors, diodes, ic's
next i would place the two headers since soldering from the top can be awkward with too many components - NOTE these need to be placed upside down! ,:
- J8 needs the pins facing up from top of pcb so the screen can go ontop and raspberry pi can go underneath
- J6 also needs to soldered from the top so a jumper from the pi board can be run to bottom of circuit
finally place the pots and jacks.
rca video-out
if you want RCA video out from the pi on this pcb a jumper needs to be run from J6 to the composite video out on the raspberry pi board. on pi0 this is a labelled pin, however on pi3 you will need to solder directly to the board. i used a header-cable, cut one side to be soldered.
need to add some images and links to this guide !