GCMax 1.1

By citrus3000psi

4 layer board of 0.99 x 1.20 inches (25.2 x 30.4 mm).
Shared on January 12th, 2018 16:45

All smd parts are 0402, unless noted otherwise. The 3.5mm audio connector will be hard to find. There are some on eBay when this description was written. I could not find an active part for one. If you know of one, let me know please. Be smart about cap voltage ratings. Just stick to 50v for .1u caps. For everything else stick to 10v caps.

Words of warning, this is a tough project to build as most components are 0402. You will also have to program the flash memory off of the board; as there are no JTAG or SPI points. Here is GC-Video 2.4 Firmware: https://mega.nz/#!Pp02EC6S!D28bK7B8itsLhaYvJ7FCVOisHPrEX-WldAKEodoKGjg

I’ve yet to compile 2.4a for this project.

This project would not be possible without unseen’s GC-Video work. GC-Video can be found at his github. https://github.com/ikorb/gcvideo

Ref Item
BU1 B3U-1000P
C1 .01u
C2,C4,C5,C6,C7,C8,C9,C10,C11,C12,C13,C14,C15,C16,C17,C18,C21,C22,C26 .1u
C3 4.7u
C19,C25 10u
C20 2.2u
CON1 ST60-10P(30)
CON3 2013978-1
CON2 GP1FD310TP
D1 LED (0603)
R1 348
R2,R3 4K7
R5 180
R6,R11 10K
R7,R8,R9 75
R10 550
R12 1K
R13 40
R14,R15 330
R16 100
L1 ACML-0805-110-T
U1 XC3S200A-4VQG100C
U2 CDK3404
U3 TSOP36238TR
U4 TLV70212DBVR
U5 M25P40-VMN6PB
U6 LP2980AIM5X-5.0/NOPB SOT23-5
U7 TSOP36238TR

To Build a custom RGB w/ scart head cable you need the following:

  • ST40X-10S-CV(30)
  • ST40X-BS(5.8)
  • ST40X-CM(5.8)
  • 30-00534
  • https://oshpark.com/shared_projects/FbXTWD5Y
  • https://oshpark.com/shared_projects/GuPBz4qf
  • https://console5.com/store/scart-plug-21-pin-male-cable-connector.html

The scart cable is not easy to build as everything fits very tight. The output on the Hirose connector is as follows:

Pin # Output
1 Coaxial Audio
2 Mode (GND this pin to force YPbPr)
3 VSync
4 HSync
5 CSync
6 +5
7 GND
8 RED
9 GREEN
10 BLUE


GCMax 1.1

By citrus3000psi

4 layer board of 0.99 x 1.20 inches (25.2 x 30.4 mm).
Shared on January 12th, 2018 16:45

All smd parts are 0402, unless noted otherwise. The 3.5mm audio connector will be hard to find. There are some on eBay when this description was written. I could not find an active part for one. If you know of one, let me know please. Be smart about cap voltage ratings. Just stick to 50v for .1u caps. For everything else stick to 10v caps.

Words of warning, this is a tough project to build as most components are 0402. You will also have to program the flash memory off of the board; as there are no JTAG or SPI points. Here is GC-Video 2.4 Firmware: https://mega.nz/#!Pp02EC6S!D28bK7B8itsLhaYvJ7FCVOisHPrEX-WldAKEodoKGjg

I’ve yet to compile 2.4a for this project.

This project would not be possible without unseen’s GC-Video work. GC-Video can be found at his github. https://github.com/ikorb/gcvideo

Ref Item
BU1 B3U-1000P
C1 .01u
C2,C4,C5,C6,C7,C8,C9,C10,C11,C12,C13,C14,C15,C16,C17,C18,C21,C22,C26 .1u
C3 4.7u
C19,C25 10u
C20 2.2u
CON1 ST60-10P(30)
CON3 2013978-1
CON2 GP1FD310TP
D1 LED (0603)
R1 348
R2,R3 4K7
R5 180
R6,R11 10K
R7,R8,R9 75
R10 550
R12 1K
R13 40
R14,R15 330
R16 100
L1 ACML-0805-110-T
U1 XC3S200A-4VQG100C
U2 CDK3404
U3 TSOP36238TR
U4 TLV70212DBVR
U5 M25P40-VMN6PB
U6 LP2980AIM5X-5.0/NOPB SOT23-5
U7 TSOP36238TR

To Build a custom RGB w/ scart head cable you need the following:

  • ST40X-10S-CV(30)
  • ST40X-BS(5.8)
  • ST40X-CM(5.8)
  • 30-00534
  • https://oshpark.com/shared_projects/FbXTWD5Y
  • https://oshpark.com/shared_projects/GuPBz4qf
  • https://console5.com/store/scart-plug-21-pin-male-cable-connector.html

The scart cable is not easy to build as everything fits very tight. The output on the Hirose connector is as follows:

Pin # Output
1 Coaxial Audio
2 Mode (GND this pin to force YPbPr)
3 VSync
4 HSync
5 CSync
6 +5
7 GND
8 RED
9 GREEN
10 BLUE