Analog Synth Envelope Generators

Close up of (13 of 88) Attack/Release envelope generators I finished building over the holiday break. Most people don't make their own electrical components. But I've gone all out for this vacuum tube synthesizer. *Technical Details The three leads clockwise from top are: 1. Key-Trigger Input from Keyboard Note (Optically Coupled) 2. Anode (+140volts DC) 3. Cathode Follower Output (Connect to ground thru 1MΩ current limiting resistor) #diy #myphoto #electronics #music #synthesizers