An Example Test schematic. I ... the output from the Arduino is the input to the circuit). Conversely, the comparator output and the connection to the Arduino’s analog converter (A0) ...

He put the project out on Hackaday.io and also has a video tutorial you can see below. There are five input pins to the chip which lets you connect one analog pin to any one of 32 analog pins.

Becky Stern shows you how to use digital and analog inputs when building Arduino circuits, ... for example. Arduino is a key tool to learn new things. Anyone – children, ...

Inputs are components that send data to the Arduino. They're either digital (only sends HIGH or LOW signals) — think pushbuttons and PIR motion sensors — or analog (sends a range of data ...

PWM pins work the same way across all Arduino boards, so you don't need to go out of your way to buy a Mega if you already have a board supporting PWM. On the Uno, Nano, and Mini, the PWM pins are ...