MiSTercade v1 VGA voltage adapter rev 3
author: Pdiggitydogg
2 layer board of 1.41 x 1.64 inches (35.8 x 41.7 mm)
Uploaded:
November 29, 2023
Shared:
November 29, 2023
Total Price:
$11.55
This is a simple correction board for consumer-level RGB on the v1 MiSTercade HD15 port. This will negate the need for the add-on XL board, which I found to be unnecessary for me. The series resistors create a voltage divider, utilizing the 75ohm terminations, on the input side of the monitor. This will effectively lower the voltage to expected level ranges for the majority of equipment, and carry Csync on the H sync line, if enabled. You may float V sync or jumper it, with a clipped resistor leg. It has been recommended that V sync float if using csync, but I have not tested this. GunCon support added at the H sync pin, pre-resistor.
BOM are basic components for any skill level. ¼ Watt resistors: 270 ohm (x3) for RGB; 680 ohm (x1) H sync line if Csync; RCA jack (x1) for Lightgun; HD15 ports (x2).
This is a simple correction board for consumer-level RGB on the v1 MiSTercade HD15 port. This will negate the need for the add-on XL board, which I found to be unnecessary for me. The series resistors create a voltage divider, utilizing the 75ohm terminations, on the input side of the monitor. This will effectively lower the voltage to expected level ranges for the majority of equipment, and carry Csync on the H sync line, if enabled. You may float V sync or jumper it, with a clipped resistor leg. It has been recommended that V sync float if using csync, but I have not tested this. GunCon support added at the H sync pin, pre-resistor.
BOM are basic components for any skill level. ¼ Watt resistors: 270 ohm (x3) for RGB; 680 ohm (x1) H sync line if Csync; RCA jack (x1) for Lightgun; HD15 ports (x2).
