Digital Logic Gates from Transistors, AND, NAND, OR, NOR, XOR, XNOR, Buffer, and Inverter

Parts To Build Logic Gates.
Quality Breadboards
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2N2222 Transistors
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Breadboard 22 Gauge Wire
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LEDs
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Resistors 2K 1/4 Watt Metal Film Type
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Variety of Resistors (1-Pack)
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10000mAh Rechargeable Battery Pack
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Recommended Tools
Wire Stripper
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Side Cutter
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Scissors (To mark wire cuts and cut resistors to length)
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Automatic Wire Stripper (I did not use this but it could be nice)
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Video Description:
How to build digital logic gates using individual transistors is discussed in detail. The logic gates are built on breadboards using transistors, resistors, LEDs, and different color wires. The truth table and circuit diagram will be shown for each logic gate. In many cases, there is more than one way to build the logic gate so multiple configurations will be shown.

The types of logic gates that are built and tested are a switch, inverter, buffer, AND gates, NAND gate, OR gates, NOR gate, XOR gates, and an XNOR gate. At the end of the video, I also demonstrate how to properly wire up AND logic gates on a breadboard using integrated circuits.

All of the logic gates are built with 2N2222 transistors and the circuit is powered with a 5-volt power supply. The positive wires are red, the ground wires are black, and most of the resistor values are 2K.

0:00 Intro
2:21 How transistors work
3:34 Transistor as a switch
5:35 Inverter
8:15 How to send output
11:13 Buffer 1
12:20 Buffer 2
15:33 Resistor Values
16:48 AND 1
19:00 AND 2
20:07 AND 3
21:46 NAND
22:44 OR 1
25:10 OR 2
26:44 OR 3
28:40 OR 4
30:38 NOR
31:48 XOR 1
35:19 XOR 2
35:51 XOR 3
37:02 XOR 4
38:05 XNOR
40:23 AND 4
42:58 AND 5
AND Gates with ICs
44:19 AND 6
46:42 AND 7
48:07 What is inside an IC