El Dinosaurio

El Dinosaurio is the nickname of an analog patch chord programmable voltage controlled synthesizer that I designed and built from scratch in the late 70's and early 80's. This is the second synthesizer I built, it took me about 1 1/2 years to finish and I was done sometime in 1981. I did the electronic and mechanical design, hand etched all the PCBs, cut the face plates, and assembled the whole monster. This is the front panel:

Modules (top rack, from left to right):

Modules (bottom rack, from left to right):

  • 5 channel analog mixer (noise, RM, VCO1, VCO2, VCO2)
  • LFO
  • ADSR envelope generator

And this is a complete view:

I don't normally use my old keyboard controller, I just drive it from a MIDI controller and/or my computer.

Tech Notes