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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

dr-cockroachDr. Cockroach 10/14/2018 at 19:221 Comment

After working with the Light Logic circuit for a few days, I have realized that there is one component that is not needed. Thank you @Yann Guidon / YGDES for the nudge. I decided to remove the resistor between positive and the CdS cell. This resistor was there in the event that a diode And or Or  gate was following the Light Logic gate. My thinking is that I will stick with the inv LL gates as the diode Or's loose some of their logic level. I can always add a Not to a Nand to make a And gate and maintain the logic level.

I have also reduced the value of the resistor from positive to the led to 220 Ohms. In my case this gives stronger light and still protects the led at 3 volts.

Discussions

Yann Guidon / YGDES wrote 10/15/2018 at 13:07 point

Awesome :-D that's a different way of doing it than I thought but it's a progress !

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