RGB SCART daughter board for the IF-C01COMG Clone board. This board also has support for a sync stripper circuit selectable by SW2. If enabled the LED in D1 will light up. Supported sync strippers are LM1881 and EL1883 (and whatever other pin compatible). LM1881 supports running directly off 12V and thus if using this, close the JP1 jumper with solder, and you can then skip U2 and its two capacitors C5 and C6. EL1883 runs off 5V, which must then be supplied by U2, and JP2 then needs to be closed instead. THEREFORE ONLY CLOSE EITHER JP1 OR JP2, NOT BOTH!

This is Rev. B with the stereo-to-mono fixed properly.

SW1 selects to route audio to stereo RCA plugs or to internal mono audio.

SW1 and SW2 can also be omitted and jumped accordingly (the switches are quite expensive…)

Parts list:

• J1, Kycon K-SCARTX-024 (Mouser P/N: 806-K-SCARTX-024)
• J2, RCJ-022 (Mouser P/N: 490-RCJ-022)
• J3, RCJ-023 (Mouser P/N: 490-RCJ-023)
• J4, Molex 52852-1472 (Mouser P/N: 538-52852-1472)
• C1, 100nF 0805 MLCC
• C2, 10uF 0805 MLCC
• C3, 100nF 0805 MLCC
• C4, 100nF 0805 MLCC
• C5, 10uF 0805 MLCC
• C6, 10uF 0805 MLCC
• R1, 680k 1% 0805 Resistor
• R2, 1.5k (or whatever, depending on LED brightness preference) 0805 Resistor
• R3, 475R 1% 0805 Resistor
• R4, 475R 1% 0805 Resistor
• R5, 20K 1% 0805 Resistor
• D1, 5mm LED of whatever color
• U1, LM1881 SOIC-8 (Mouser P/N: 926-LM1881MX/NOPB ) or EL1883 (Mouser P/N: 968-EL1883ISZ)
• U2, AZ1117IH-5.0TRG1, SOT-223-3, 5V regulator (Mouser P/N: 621-AZ1117IH-5.0TRG1)
• SW1 ESWITCH DPDT (Mouser P/N: 612-100-F1121, or much cheaper TME.eu TSM202A2)
• SW2 ESWITCH DPDT (Mouser P/N: 612-100-F1121, or much cheaper TME.eu TSM202A2)

Connect the two boards with a Molex 15267-0300 FPC cable (Mouser P/N: 538-15267-0300)

The mechanical slots for the SCART plug are hacked in due to OSHParks missing oval slot support. It should be good though.

Base board here: https://www.oshpark.com/shared_projects/hMJMT0yM

Mounting bracket here: https://www.thingiverse.com/thing:2888467