634 RING COUNTER is an analog synthesizer module available as a PCB/panel set for DIY construction. It is a counting module with CLOCK and RESET inputs, 16 gate outputs, and 2 clock divider stages.

Like all 600 series modules, 634 RING COUNTER is 20hp (101.3mm) wide. Knobs and panel jacks align to a uniform 20.32mm spacing grid. Power and mounting specifications conform to “Eurorack” standards. PCB construction is single-board and through-hole. Panel is black FR-4 and so might have some minor blemishes from the manufacturing process.

Usage:

Numbered (1–16) jacks are gate outputs (0 to roughly 5v) that go high in sequence at the rising edge of a signal at CLOCK that crosses a 1v threshold. Additionally, the /4 output goes high when 3, 7, 11, or 15 is high (i.e., the upbeat or offbeat if 634 is used as a sixteenth note counter), and the /8 output goes high when 5 or 13 is high (i.e., the backbeat). LEDs indicate all gate statuses. A threshold crossing signal at RESET returns the count to 1.

Please consult the "bill of materials" for construction notes before ordering.

Resources:

PCB GERBER

SCHEMATIC

BILL OF MATERIALS

SIMULATION