r_e_c_u_r/documentation/incur_circuit_docs.md

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	10K_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	tall long stacking header	from amazon like this - the tall is needed to clear the ethernet port

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

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 !