Diagrams
- Circuit Diagram Page 1
- Circuit Diagram Page 2
- Circuit Diagram Page 3
- PCB Artwork
- PCB Component Layout
- Front Panel
- Software Screen Capture
Zip Files
- Front Panel in CorelDraw Format
- Software (also for Eprom Emulator) for MS-DOS with QuickBASIC Source Code
- PCB Gerber Files
Tips
The Harris CDP6402 may be replaced with a Harris HD6402.
Parts
| Resistors (0.25W 5% or better) | |
| R1 | 4M7 |
| R2 | 2K2 |
| R3 | 1K0 |
| R4,7,9,14,17 | 47K |
| R5,6,8,10,11,16 | 4K7 |
| R12 | 100R |
| R13 | 470R |
| R15,18 | 22K |
| RN1 | 10K x 8 Resnet |
| Capacitors (all 16V or greater) | |
| C1,2,3,4,5 | 22u |
| C6,7 | 22p |
| C8,16,17 | 2n2 |
| C9 | 10u |
| C10,11,12,13,14,18,20 | 100n |
| C15 | 47u |
| C19 | 1u0 |
| Semiconductors | |
| IC1 | MAX232 |
| IC2 | 74HCT4060 |
| IC3 | CDP6402 (Maplin QQ04E) |
| IC4 | 74HCT14 |
| IC5,8 | 74HCT4024 |
| IC6 | 74HCT4040 |
| IC7 | 74LS245 |
| IC9 | 74LS10 |
| IC10 | 7805 |
| TR1,2 | BC548 |
| D1,2,3,4,5,6,7,8,9 | 1N4148 |
| Miscellaneous | |
| XT1 | 2.4576MHz |
| SK1 | 9 or 25 way D |
| SK2 | 28 way ZIF socket |
| SK3 | DC INPUT |
| SW1 | push to make |
| SW2,3 | 4 pole 3 way rotary |
PCB, Case, knobs, wire.
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