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Table of Contents
Paper-Synthesizer 808KD - Kick Drum Module
Functional Clone of Tr-808 Bass Drum
by Wolfgang Spahn
(Concept & Board by Antti Pussinen and Wolfgang Spahn)
Handout
Paper-PCB & Schematic
Circuit Simulation
The “Twin-T” oscillator uses two “T” RC circuits operated in parallel. One circuit is an R-C-R “T” which acts as a low-pass filter. The second circuit is a C-R-C “T” which operates as a high-pass filter. Together, these circuits form a bridge which is tuned at the desired frequency of oscillation.
Twin T
808 Simulation