Power Regulator for N64RGB DAC
This little PCB is designed to used with
This PCB has a regulator on board which generated 3.3V power supply for the mentioned mod-boards. It has been discussed at the Shmups forums that the output suffers from digital noise probably depending on CPU, PPU and APU load.
Power the replacement RGB DAC from a different power supply source may help to 'decouple' this noise from the analog part.
 Future releases may have a regulator on board. It has not been designed yet.
Buiding the PCB
You may use any PCB prototype service of your choice or use a pre-existing OSHPark project.
Order the board as thin as possible; <1.0mm should be fine. This means for OSHPark service use 0.8mm substrate thickness.
- U1: one of the following ICs, all SOT223 package (may named differently for each manufacturer)
- C1: 10-100uF/16V+ (SMD0805-1210)
- C2: 10-100uF/6.3V+ (SMD0805-1210)
- C3: 2.2uF / 6.3V+ (SMD0603)
- If not already done: assemble the PCB.
- If you have an existing installation, first disconnect the 3.3V power supply wire from the modding board.
(Please look onto the pin out diagrams if you use viletims board - it may be one wire of the ribbon cable)
- Solder the PCB under the power switch of the N64 mainboard (upper part) such that the PCB ranges to the inner side.
- Connect the 3.3V output to the modding PCB
Many thanks to Womi (circuit-board.de user) for testing and giving feedback.
Also many thanks to the shmups community for the discussion, especially but not limited to leonk, Syntax, kel, viletim, Thomas83lin, and many more...