The parts list:
| Item | Amount |
|---|---|
| 7406 | 1 |
| 74LS14 | 1 |
| 74LS86 | 1 |
| 1 kohm 1/4 W resistor | 3 |
| 100 nF ceramic capacitor | 3 |
| 8-wire cable | 0,5 m |
| 2-wire cable | 0,5 m |
| 6-pin female DIN connector | 1 |
| DB25 male connector | 1 |
| DB25 connector shell | 1 |
| DB15 male connector | 1 |
| DB15 connector shell | 1 |
| piece of perf board | 1 |
| small plastic case | 1 |
The schematic:
The +5 V supply voltage can be obtained from PC joystick port pin 1. You'll of course also need to connect the signal ground to LPT port pins 18-25 and DIN6 connector pin 2.
The complete device might look something like this:
With case open: