Dr. Cockroach| Quantity | Component name | |
| 1 | × | Led White |
| 1 | × | CdS Photo Resistor LDR |
| 1 | × | Switching diode 1N914 or other switching diode |
| 1 | × | Resistor 150 Ohms for 5 volts. Adjust value acording to voltage / current needs |
LIGHT LOGIC - HIC SVNT DRACONES
Using a LED/LDR pair to form inverting Photonic logic gates. The entire Boolean logic set handled by resistors and diodes! Who'd'a thunk