Variable Frequency Arduino Generator (with Pictures) - Instructables
Arduino square wave generator up to 1Mhz | Hackaday.io
1Hz to 30KHz Wave Generator Using Arduino - Electronics-Lab.com
DIY Arduino Waveform Generator or Function Generator
Function Generator (Sine, Triangular, Chainsaw, 32 kHz Max) - Hackster.io
Arduino-Based Frequency Generator | Full DIY Project
Arduino Tone Generator – Simple DIY Electronic Music Projects
DDS sine signal generator for AM modulation from 1 Hz to 40 MHz with an AD9850 or AD9851, an ATmega328, and an Arduino firmware | Electronics and Mechanics for Hobbyists
How To Make A Simple Variable Frequency Generator Using Arduino- (Part 23/49)
Waveform Generator using Arduino - YouTube
Generate Square Wave from Arduino & ESP8266 NodeMCU - Frequency, Duty Cycle & PWM | Som Tips - YouTube