This is the last circuit of the first part (PK-101) of the PK-201 course. This circuit is a combination of some of the other digital gates. There is one output that uses a LED, and three inputs X is the red wire, Y is the blue wire, and Z is the green wire. In the video, I show the work book's truth table, I then demonstrate the experiment then I return to the truth table before cutting. The pictures below are the circuit and the schematic out of the work book.
I believe this is an OR gate that is connected to a third transistor acting as an electronic on/off switch. The transistor is turned on using the green wire or the Z input. Because the LED only lights when Z is connected to the 9v input with either the X and/or Y input connected to 9v input.
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| Circuit |
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| Schematic Experiment #50 |
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