/neat_4-player_adapter

4-player adapter for Commodore 64

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neat 4-player adapter

4-player adapter for Commodore 64 based on the Protovision design.

Added features:

  • ESD protection
  • 5V output for active joysticks like optical switches, auto-fire, converters etc.
  • Standard connector distance for support of joystick switchers, NES/SNES converters etc.
  • Cover made of PCB. No 3D printed parts.
  • Reset switch
  • Compact vertical design

Bill of materials:

Definition Manufacturer Manufacturer PN Case/Package Quantity Designator Link
CAP CER 100nF 50V X7R 0805 Yageo CC0805KRX7R9BB104 0805 1 C1 Digikey
RES ARRAY 10K X4 ISOLATED 1206 Yageo YC164-JR-1310KL 1206 2 RN1, RN2 Digikey
SWITCH TACTILE SPST-NO 160GF SMD RA Panasonic Electronic Components EVQ-PUA02K 4-SMD 1 SW1 Digikey
TVS DIODE 6CH UNIDIR. 6.1V 8-SOIC STMicroelectronics ESDA6V1U1RL 8-SOIC 2 D1, D2 Digikey
IC MULTIPLEXER 4 X 2:1 16-SOIC Texas Instruments SN74LS257BDR 16-SOIC 1 U1 Digikey
CONN D-SUB MALE PLUG 9POS R/A TH Assmann WSW Components A-DS 09 A/KG-T2S 9-TH 2 P3, P4 Digikey
805 Series 2*12 Pin Card Edge Connector - - 24-TH 1 J1 Aliexpress
Aluminum column post M3*6mm - - - 4 - Aliexpress
Black Stainless Steel Flat Allen Cap Screw M3*4mm - - - 6 - Aliexpress
Black Stainless Steel Flat Allen Cap Screw M3*12mm - - - 2 - Aliexpress
neat 4-player adapter PCB - - - 1 - JLCpcb
cover PCB - - - 1 - JLCpcb

Schematic

Gerbers and ordering

Gerber files are available HERE for the PCB and HERE for the cover PCB.

Below are the ordering parameters for JLCpcb. Add the PCB remark for the cover or they may cut away part of the PCB graphics. I usually confirm the production file to make sure.

Parameters for the PCB:
PCB Thickness: 1.6mm
PCB Color: Black
Surface Finish: HASL (or lead-free HASL)
Via Covering: Tented

Parameters for the cover:
PCB Thickness: 1.6mm
PCB Color: Black
Surface Finish: HASL or LEadFree HASL
PCB Remark: "There is silk on copper on purpose on the PCB art. Please do not cut away silk on copper."

Soldering

Interactive HTML BOM for help with soldering.

The pins of the D-SUB9 connectors need to be cut shorter so they don't protrude through the PCB. They can then be soldered flat so the pins don't touch and scratch the C64 case.

Assembly

Connect the PCB and cover with screws and columns. Use the longer screws for the edge connector.

Licence

neat 4-player adapter by Pasi Lassila is licensed under CC BY-SA 4.0