Squid Axon

A squid nerve cell simulator, after the Hodgkin-Huxley equation and a 2003 paper by T. Matsuzaki and M. Nakagawa: a four-stage analogue shift register with two feedback paths, one nonlinear and one linear. With both turned down it is a plain ASR; turned up, its four outputs give more complex, staggered patterns.

Key features

• CLOCK input and three inputs, IN1 to IN3
• NONLINEAR FEEDBACK and IN3/FEEDBACK knobs
• Four outputs, OUT1 to OUT4
• 8 HP; current draw as ModularGrid lists it (Nonlinearcircuits publishes no current draw, depth or assembled price: it sells the DIY PCB and panel)