DIY Modular Synth Explained – CD40106, CD4017, CD4046

🔧 UPDATE 2026: This DIY modular synth project is an early experiment that led to my current hardware and ESP32-based devices. If you're into weird instruments, system design, and DIY electronics, check out the latest videos on the channel. Also, my PCBs are all available on my Tindie: https://www.tindie.com/stores/philstudio/ --- In this video, I explain how my homemade modular synth works, built entirely with CMOS logic ICs. Modules featured in this project: • CD40106 – Clock / Pulse Generator • CD4017 – 10-Step Sequencer • CD4046 – Voltage Controlled Oscillator (VCO) • CD4093 – Modulation • 8038 – Function Generator • Photoresistor (LDR) for optical modulation This video focuses on how the modules communicate together to generate complex sounds. CD40106 Oscillator (clock) : https://www.youtube.com/watch?v=x2Jt1os23UM CD4017 Sequencer : https://www.youtube.com/watch?v=qI5WTshUXbg CD4093 Modulation : https://www.youtube.com/watch?v=oryc3qUOJ8Q CD4046 VCO : https://www.youtube.com/watch?v=SCemzB7GonE Photoresistor Theory : https://www.youtube.com/watch?v=b9NsQ3mut2g #diysynth #modularsynth #cmos