How to make Logic Gates with Transistors
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Logic gates normally come packaged in integrated circuits, but to study the internal works of them you need to be able to build them using discrete components. This is a great exercise for those interested in digital electronic circuits for beginners, specially if you like to learn exactly how things work internally.
3 things you should know about How to make Logic Gates with Transistors
Logic gates are the basic components of digital electronics. Normally you can't see how they are made because of one of the great benefits of digital: they are packaged in very small containers.
Logic gates are made with transistors, because of their ability to be used as electronic switches. When connected in certain ways the transistors perform the logic function that we need.
The simplest logic gate can be built using only one transistor: the NOT gate. To build it you need to configure the transistor to be in open collector mode, so that when voltage is applied at the base, the transistor switches on and connects to ground, effectively inverting the input applied at the base.
Logic gates are made with transistors, because of their ability to be used as electronic switches. When connected in certain ways the transistors perform the logic function that we need.
The simplest logic gate can be built using only one transistor: the NOT gate. To build it you need to configure the transistor to be in open collector mode, so that when voltage is applied at the base, the transistor switches on and connects to ground, effectively inverting the input applied at the base.
Basic Gates Diagrams
AND gate - Here you need to connect two transistors in a way that the output is high only when both inputs are high.
OR gate - This is simpler, you connect them in a way that when either input is high the output will be high.
NOT gate - This is the simplest one to build, as mentioned in the introduction, you only need one transistor for this one.
OR gate - This is simpler, you connect them in a way that when either input is high the output will be high.
NOT gate - This is the simplest one to build, as mentioned in the introduction, you only need one transistor for this one.
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More articles I created on various topics of electronics, including tutorials and some fun circuits.
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