GENiE

Three neuron circuits and a difference rectifier. Each neuron's output is fed to the switching pin of the next neuron's attenuated input, 1 to 2, 2 to 3 and 3 to 1, so the circuit works with a single input signal, delivering all kinds of mayhem at the outputs; four shared inputs feed the same signals to neurons 1 and 2 and to neurons 2 and 3. The difference rectifier compares the outputs of neurons 1 and 3 to neuron 2's (OUT- and OUT+). To use the neurons on their own, turn down the input pots or patch the upper neuron-specific inputs to cut the signals from their neighbours. Noisy and unruly like a set of synaptically connected neurons, for audio, CV or both. The name is the computer of Keith Laumer's 1964 novel The Great Time Machine Hoax.

Key features

• Three neurons with SENSE, REACT and input level knobs, ringed 1 to 2, 2 to 3, 3 to 1
• Shared inputs IN1/2 and IN2/3
• OUT1, OUT2 and OUT3; the difference rectifier's OUT- and OUT+
• Three LEDs
• 12 HP; Nonlinearcircuits publishes no current draw, depth or assembled price (it sells the DIY PCB and panel), and ModularGrid lists none