XOR and still transistor less

A project log for Light Logic

Using a Led and CdS LDR to form inverting Photonic logic gates. The entire boolean logic set handled by resistors and diodes! Who'd'a thunk

Dr. CockroachDr. Cockroach 06/22/2019 at 22:240 Comments

I am working on a educational display to showcase Light Logic and how it works.

This is a combination of NAND, OR and AND gates to create a working XOR gate. And as the same for all Light Logic gates, transistors are not to be found. Just diodes and resistors. Power leads are under the paper to better show the logic wiring.