VC Sequencer Kit

DIY Voltage Controlled Sequencer - 10HP Eurorack eight step sequencer from RYO!

This is a full kit set in the Eurorack format.

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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.

It can keep sync above audio rates. Overall latency on version 1.3 is approximately 5uS (0.005mS) until the step changes + up to approximately 10uS (0.01mS) to change the voltage (bigger change = longer time).

In version 1.3 the CV mode got an improvement allowing it to reach thru the whole audio range. This effectively extends the VC Sequencers funtionality into also being a 3 bit hands-on waveshaper.

In FWD/REV mode the CV/Clock input use a schmitt trigger that turns from low to high at approximately 2.5V and from high to low at approximately 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 doesn't need it's own schmitt trigger. Each step is separated by approximately 0.625V.

Expanders will offer chaining of 2 VC Sequencers for 16 step operation and unlimited extra parallel channels of CV or gate/trig, for example our first expander that have individual gate or trig outs for each step in 4hp. The 16 step expander will add an extra latency and lower the maximum clock frequency in 16-step mode.

The VC Sequencer Kit contains 3 PCBs to be populated with components. It might not be suitable for one of your very first builds as it is a little larger build and there are connections between PCB's.

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

Specs & Downloads

Specs & Downloads

Manufacturer RYO
HP 10
Depth 45mm
+12V 22mA
-12V 11mA
+5V No
Additional Resources Build Guide Schematics Bill of Materials


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