![]() ![]() The circuit symbol for a two-input AND gate is that funny bullet-shaped thing. The first type of gate we will look at is the AND gate. ![]() You will need to fork the circuit to be able to experiment with the circuitry like we will a little later, but if you can't be bothered its OK if you just hit the simulate button and get started. There is a 123Dcircuits circuit that goes with this Instructable here. Logic gates may be strung together and combined almost infinitely, and such combinations can be designed to make pretty complex decisions based on any number of variables.īy the end of this Instructable, we will have covered: The logic gate also has one output terminal, and the voltage at this terminal will be high or low depending on the type of gate and the inputs received. These inputs can come from anything, be it a battery, a sensor, some IC or even another logic gate. Typically a high voltage is read as a 1 and a low voltage as a 0. So what are logic gates? Logic gates have one or more input terminals, and the voltage at these terminals are translated into Boolean inputs of 1 or 0. In this Instructable we will talk about a few of the simplest of these devices, and see some of the fun things you can do with them. Logic gates are some of the basic building blocks of digital logic circuitry.
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