Caption Dual USB inputs and 12-bit analog I/Os. The Due is also the first Arduino to feature a built-in digital-to-analog converter — two, in fact.

[Brian Dorey] just released a board that allows for 8 analog inputs on the Raspberry Pi with a 16-bit resolution that is much higher than any Arduino-based build.

We’ve taken the versatile processor behind the Arduino Leonardo, and combined it with a Direct Digital Synthesis chip, which makes generating analog signals incredibly straightforward.

Little Bird Electronics posted an article about using an analog voltage reference with Arduino. This is a tool available when using an analog-to-digital converter. By setting up either an internal … ...

The digital signal output to be detected (usually marked as DO in the module) is applied to D2 input of the Arduino. Analog output (marked as AO) from the module is not used here.

To save the digital I/O pins, the keypad interface uses only one ADC channel (A0) for reading the key values through a 5-stage resistive-voltage divider. (real view of the lcd keypad shield) Now it is ...