Last Call BBS – How to Make the OR Gate (ChipWizard OR Gate)

Guide to Make the OR Gate


Firstly, you don’t need capacitors to make the OR gate.

Transistors only allow flow in one direction and don’t backfeed to the on/off signal, so as long as they are both connected to the same output they will work. You’ll just need a separate NPN transistor for each input so that they don’t backfeed.

Input becomes your on’off trigger, and +V becomes the actual signal

Remember that an NPN transistor only allows current to flow across blue if red is receiving a signal, otherwise it’s off.

If you’re still stuck, hover below for an example solution:

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