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An analog-to-digital converter (ADC, A/D, or A to D) is a device that converts a continuous physical quantity (usually voltage) to a digital number that represents the quantity's amplitude.
Sensors all have a basic function of measuring something, and they have to output that data in some computer readable format. This is the point where there are so many options and limitations but I will call them "interfaces". The most popular interfaces are digital, analog voltage, analog current, 1-Wire, RS232, RS485, CAN bus, and Bluetooth/ANT. Some of these interfaces can support multiple sensors per connector by daisy chaining or unique...