Build Your Own Synth Sequencer (CD4017 Tutorial for Beginners)
In this episode, we’re building a 10-step sequencer using the legendary CD4017 Decade Counter / Divider — one of my favorite ICs for creating rhythmic patterns and step-based control in DIY synths!
You’ll learn exactly how the CD4017 counts from 0 to 9, how to feed it a clock signal (from the VCO we built in the previous video), and how to connect LEDs to visualize each step of the sequence in real time.
🔧 Parts Used:
CD4017 Decade Counter IC
CD4046 or CD40106 Oscillator (as clock source)
10 LEDs + 1 kΩ common resistor
9 V battery or 12 V DC power supply
Potentiometer (10 kΩ)
100 µF capacitor
Breadboard + jumper wires
💡 What You’ll Learn:
How the CD4017 divides clock pulses into 10 outputs
How to connect LEDs to visualize sequencing
How to control speed via a potentiometer (clock frequency)
How to use the reset pin to shorten your sequence (e.g., 8-step sequencer)
👉 Pro Tip: connect the reset pin to a rotary switch for adjustable sequence length, or pair this circuit with a VCO (CD4046) to make a full analog audio step sequencer!
⚡ Watch Next:
Build a Simple VCO with CD4046 – DIY Synth Tutorial : • Build a Simple Voltage-Controlled Oscillat...
Materials + Schematic : / 1662230830458847
Datasheet : http://www.ti.com/lit/ds/symlink/cd40...
#cd4017 #diysynth #electronicsprojects