DIY SYNTH VCO Part 1: How to build an analog oscillator core from scratch

Support the channel: In this series, I’m taking a detailed look at how to build an analog VCO from scratch, using just a handful of cheap components. It’s the basis for any synthesizer. To keep it as beginner-friendly as possible, I’m explaining what all the components do in detail. This first part deals with the oscillator core, op amp-buffers, AC coupling and voltage dividers. If you want to follow along, here’s a bill of materials: 1x Breadboard 2x 9V battery plus clip OR 1x dual 9-15V power supply 1x 40106 IC 1x TL074 IC (you can also use a TL072, we won’t be needing more than one op amp) 1x 1N4148 diode 1x 1 uF foil capacitor 1x 2.2 nF foil capacitor 4x 100k resistor 1x OR jack socket lots of jumper wires Chapters: 00:00 Intro 00:28 Sound Demo 01:18 Oscillation Basics 02:17 Electricity Basics 04:13 Oscillation Close-Up 05:39 Oscillator Core Intro 05:59 Resistors, Capacitors, Diodes 07:03 Schmitt Trigger Inverter 08:02 Oscillator Core Analysis 09:04 “G