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Resistor Based Level Shifter (Resistor Divider)

Easily the cheapest and easiest way to shift voltage levels is with a resistor divider circuit. It literally takes 2 resistors. The voltage is ‘divided’ between the 2 resistors. In the example circuit above the values were chosen to be

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Transistor Based Level Shifter

One of the simplest designs I’ve found for level shifting is just tying 2 NOT gates together. The nice thing about a NOT gate is it can be made with a single transistor, which means we can make a level

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