Question

Can I use digital pins as analog?

Answer 1

The Arduino does not have a DAC. It has a 10-bit ADC with multiple inputs. And, it has 8-bit PWM outputs which can substitue for analog output for some applications.Jan 21, 2013');})();(function(){window.jsl.dh('10','

Arduino DAC - Audio - Arduino Forum

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Digital to analog conversions can be performed using resistor networks and the conversion to an analog signal is usually in the order of nanoseconds. ... Digital to analog conversions may be made using a ladder network of resistors or a weighted input to a summing amplifier.