Bill of Materials (Analog Board) - IanSB/RGBtoHDMI GitHub Wiki

Introduction

THIS BOM REFERS TO THE ISSUE 3 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:

Issue 3 gerber

Front: images/V3_analog_front.jpg

Back: images/V3_analog_back.jpg

Fitting: images/edge.jpg

Resistors

Part Description	Supplier	Quantity	Part Ref	Min Order
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

Capacitors

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

Semiconductors

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.

Sockets / Connectors

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.

Cable assembly

Part Description	Supplier	Quantity	Min Order
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.

Alternative RGB Input Connector (Not required if using above connectors)

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