The PCB Martin has designed takes the form of a small but versatile PCB based on Atmega328P Arduino Pro Mini board, ... – 4 analog pins if 1×4 keypad used.

Feather 328P Atmega328P Development Board ... 19 GPIO pins + 2 analogue-in-only pins, 6 x PWM pins, 8 x analogue inputs ... with a USB bootloader that lets you quickly use it with the Arduino IDE.

Running out of GPIO pins? Learn how to connect multiple buttons to just one Arduino pin using clever wiring and resistor ...

It transpires that some Arduino inputs are better at tolerating slowly-changing inputs than others. For example, ATmega328P (Figure 13-2, Arduino Uno and Nano) and ATmega32U4 (Figure 10-2, Arduino ...

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 ...

Sometimes the simplest things in life are the most beautiful. [The Tweaker] has soldered an LED circle on the top of an ATmega328P chip, and it looks great. Using nothing more than some solder, wir… ...

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 ...