A super-easy-to-build 8-step analogue sequencer for modular synthesis and circuit bending. There are no microcontrollers used in this design. It is comprised entirely of CMOS logic and analog opamps, so does not suffer from aliasing or any other issues present in a microcontroller-based design. This also means you can get all the parts straight from a parts store and not have to program a microcontroller, if you want to source your own parts!

Features

Flexible Power

• Consumes ~15mA @ +15/12/9V
• Does not need a negative supply rail

Easy to Build

• PCB mount step controls make the design easy to assemble
• Economical design can be built much cheaper than commercial solutions

Inputs/Outputs

• Tempo control
• Selectable sequence length (1-8)
• Simultaneous 5V and ~10V CV and Gate outputs. This means you can use sympleSEQ for pitch CV as well as higher amplitude stuff like filter modulation
• Flexible clock input accepts a wide range of voltages to clock the sequencer from
• Clock output
• Pause and Reset switches
• Pause and Reset inputs (Voltage high = active)
• Input a variable pulse-width clock and control the gate length by adjusting the pulse-width!