All you generally need is the Arduino IDE, which already includes most of the popular libraries for interfacing with ...

For those worrying that [Faransky] is relying on the PWM functionality of the Arduino Nano to generate waveforms ... and 16×2 LCD providing an interface to control it over SPI.

from basic LEDs and buzzers to more sophisticated LCD and Wi-Fi modules. The Arduino Nano is powered by an Atmel ATmega328. It's an 8-bit AVR microcontroller that operates at a clock speed of 16 ...