April 6, 2021 - Working with a free form idea of replacing input switching diodes with Leds. This is a 4 input NAND gate that shows the logic flow from input to output. This circuit works well with my existing Light Logic gates.
A project log for 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
April 6, 2021 - Working with a free form idea of replacing input switching diodes with Leds. This is a 4 input NAND gate that shows the logic flow from input to output. This circuit works well with my existing Light Logic gates.
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Very lovely!
One thing that worries me a little is that, I think, LEDs aren't particularly good at being blocking diodes.
For low voltages that should be perfectly fine, but as voltages go higher I think they might get unhappy being run in reverse, so I'd just double-check with the datasheet what they're rated for and/or perform some destructive stress testing to see the limit of them ^^
Are you sure? yes | no
Ahh, but the Leds never run in reverse..... The input diodes either are grounded by the prior CdS stage or essentially open. Grounded is a zero and open/no voltage is a one. There is no actual logic level other than zero being low resistance to ground :-)
Are you sure? yes | no