I programmed an ATMega chip with Arduino to create my first 8-bit video synthesizer. The video signals are generated the same way as the audio files so what you see is what you hear.
I used the shell of an old CRT computer monitor as a case. It is flipped upside down and attached to some used office chair wheels.
The synthesizer is controlled by arcade game buttons and a pacman joystick.This synthesizer generates sine waves at various frequencies and amplitudes. I imagine doing more of these video synthesizers to create different patterns.
A big thanks to Adrian Freed for helping me work with his digital oscillator program: