BUILD YOUR OWN CHIP-8 COMPUTER

You can build your own CHIP-8 Computer by using Point-to-Point wiring, or Wirewrapping. The wiring Interconnects make it easy to implement.  Schematics are also provided. Schematics can be downloaded from the Documents page.

This is a simplified version of the CHIP-8 classic design, taylored towards the Electronics hobbyist. 
The design is fully compatible with the CHIP-8 Hexadecimal Keypad, and EEPROM board.

Unlike the CHIP-8 Classic, RS-485 communications is not supported. However, TTL level Serial communications is provided on interface connector J6. This connector could also be used to provide RS-232 Comms, or a USB interface using the appropriate support circuitry.
Standard RS-485 Instructions are used to send and receive data (FX70, FX71, and FX72).


Visit the Products page to purchase the CHIP-8 IC.
All other parts are available through Digikey, and Mouser.

CHIP-8 IC

Parts List

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D1                 1N4001 diode
RN1               10Kx7, 8 pin SIP Resistor Network
VR1                LF33ABV TO220 Style Voltage Regulator
J1                                          2 pin Terminal Block
J2                   16 Pin DIP Socket
J3                    5 Pin Header
J4                    Yellow RCA Connector (Video Output)
J5                    White RCA Connector (Audio Output)
R1                   330 Ohm Resistor
R2                   260 Ohm Resistor
R3                   520 Ohm Resistor
R4                   75 Ohm Resistor
R5                   3.3K Resistor
C1                   100nF 50V Capacitor
C2                   10uF 16V Capacitor
C3                   100nF 50V Capacitor
C4                   10uF 6V low ESR Capacitor
C5                    47nF 50V Capacitor
U1                    CHIP-8 IC
U1 Socket       28 Pin DIP Socket. Narrow type.

Wire Wrap Interconnects

Connect VR1 pin 3 to C2 pin 1.
Connect C2 pin 1 to C3 pin 1.
Connect C3 pin 1 to J2 pin 11.
Connect J2 pin 11 to J3 pin 2.
Connect J3 pin 2 to LD1 Anode.
Connect LD1 Anode to U1 pin 13.
Connect U1 pin 13 to U1 pin 28.
Connect VR1 pin 2 to C1 pin 2.
Connect C1 pin 2 to C2 pin 2.
Connect C2 pin 2 to C3 pin 2.
Connect C3 pin 2 to C4 pin 2.
Connect C4 pin 2 to C5 pin 2.
Connect C5 pin 2 to J1 pin 2.
Connect J1 pin 2 to J2 pin 4.
Connect J2 pin 12 to J2 pin 13.
Connect J2 pin 13 to J3 pin 3.
Connect J3 pin 3 to J4 pin 2.
Connect J4 pin 2 to J5 pin 2.
Connect J5 pin 2 to J6 pin 3.
Connect J6 pin 6 to R4 pin 2.
Connect R4 pin 2 to U1 pin 8.
Connect U1 pin 8 to U1 pin 19.
Connect U1 pin 19 to U1 pin 27.
Connect VR1 pin 1 to D1 Cathode.
Connect D1 Cathode to C1 pin 1.
Connect D1 Anode to J1 pin 1.
Connect C5 pin 1 to J5 pin 1.
Connect J5 pin 1 to R5 pin 2.
Connect J2 pin 8 to U1 pin 11.
Connect J2 pin 7 to U1 pin 14.
Connect J2 pin 6 to U1 pin 15.
Connect J2 pin 5 to U1 pin 16.
Connect J3 pin 4 to U1 pin 25.
Connect J3 pin 5 to U1 pin 24.
Connect J2 pin 9 to U1 pin 17.
Connect J2 pin 10 to U1 pin 18.
Connect LD1 Cathode to R1 pin 1.
Connect C4 pin 1 to U1 pin 20.
Connect R1 pin 2 to u1 pin 26.
Connect R5 pin 1 to U1 pin 23.
Connect J2 pin 1 to U1 pin 4.
Connect J2 pin 2 to U1 pin 5.
Connect J2 pin 3 to U1 pin 6.
Connect J2 pin 4 to U1 pin 7.
Connect J6 pin 1 to U1 pin 22.
Connect J6 pin 2 to U1 pin 21.
Connect J4 pin 1 to R2 pin 2.
Connect R2 pin 2 to R3 pin 2.
Connect R3 pin 2 to R4 pin 1.
Connect R2 pin 1 to U1 pin 2.
Connect R3 pin 1 to U1 pin 3.
Connect RN1 pin 1 to VR1 pin 3.
Connect RN1 pin 2 to U1 pin 18.
Connect RN1 pin 3 to U1 pin 17.
Connect RN1 pin 4 to U1 pin 16.
Connect RN1 pin 5 to U1 pin 15.
Connect RN1 pin 6 to U1 pin 14.
Connect RN1 pin 7 to U1 pin 13.
Connect RN1 pin 8 to U1 pin 1.

Schematics

Construction Notes

 1.   When wiring up the 16 pin DIP Socket J2, ensure that Pin 1 is oriented in the top right hand corner - as shown.