Bong0

Twin-T drum with an LED as a nonlinear resistor

Nonlinearcircuits · 4 HP · 3U

Panel · 20.3 × 128.5 mm

Description

A twin-T drum module with an LED acting as a nonlinear resistor, which gives it its character. TRIG plays it as a normal drum; IN takes a CV, a gate or audio, alone or with TRIG. It also makes basslines, drones and a crude but useful VCO. About twenty 0805 parts and a TL072: a good first SMD build.

Key features

  • IN and TRIG in, OUT
  • ENV and FREQ knobs; the green LED of its circuit, seen on the panel
  • 4 HP; Nonlinearcircuits publishes no current draw, depth or assembled price (it sells the DIY PCB and panel), and ModularGrid lists none

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