Currently the pyboard is the only board with a built-in DAC, other boards like the ESP8266 do not support a DAC. MicroPython boards with a built-in DAC are somewhat uncommon. A digital to analog converter can take digital values like music samples and converts them into voltages and analog signals that can drive a speaker. Sound files on your computer are stored as numbers in a digital format but speakers can't 'play' these numbers and instead need a special analog signal of varying voltages to make sound.
Instead of reading analog voltage values the DAC will generate voltage values based on a digital or numeric input.ĭigital to analog converters are useful when interfacing with some analog components, for example a speaker which plays sound and music. Think of a DAC as the opposite or compliment to an analog to digital converter.
A digital to analog converter (DAC) can take a digital or numeric value and convert it into a voltage.
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