RYO VC Sequencer V1.5 (Grayscale)

The RYO VC Sequencer is available as an assembled module and as a Eurorack DIY synth kit.

Grayscale panel version

Compact 8-step sequential voltage source in 10hp with classic forward/backward operation using a clock, and any kind of pattern you like using control voltage levels scaled to each step of the sequencer, allowing the waveform you feed it with to determine the running pattern. Examples of this would be a ramp to make it go forward, saw to go backward, triangle for pendulum, S&H'd noise for random etc. You could also use another sequencer's pattern to control the pattern of the VC Sequencer, the possibilities for exploration are many.

All low latency CMOS and Opamp circuitry. No software or micro processors.
Final measurements: It can keep sync well above audio rates, with a low jitter 50% PW and 0-5V clock source it can keep sync up to ca 40kHz clock signal. Overall latency is ca 10us (0.01ms) until the step changes + up to ca 10us (0.01ms) to change the volt (bigger change = longer time). Other waveforms and amplitudes can be used at lower frequencies as long as the waveform at least crosses over slightly more than the whole schmitt window between 2.3-2.5V, all inputs can handle the full power supply range. CV adressing mode is significantly slower as it was in the prototype too.

In FWD/REV mode the CV/Clock input use a schmitt trigger that turns from low to high at ca 2.5V and from high to low at ca 2.3V (a window of 0.2V or 200mV), the same window applies to the Reset input. In CV mode the CV/Clock input use a set of 7 schmitt triggers with a window of ca 10-15 mV (0.01-0.015V). The first step don't need it's own schmitt trigger. Each step is separated by ca 0.625V +- the schmitt window.

Kits comes supplied with PCB, front panel (PCB material), component kit, knobs, power cable and mounting screws. Solder and tools are not supplied.

On Demand Info

These kits and assembled modules are offered on demand, click the link to learn more.