via electro-music.com
"The VCPS-8 is a sequencer providing one channel of gates, triggers and CV. For control there is a clock in, manual step, manual reset and a reset in. The trigger length follows the pulse width of the incoming clock signal. The reset button is an stop/reset and inhibits the sequencer as long as pushed. However the reset input creates a short reset pulse from the incoming reset gate/pulse signal to prevent the sequencer from stopping. This comes in handy when resetting the sequencer using a divider. Think about it…
And then there is a section to provide voltage control of the gate/trigger patterns: CV in, manual pattern select (offset/fine), and two LEDs indicating the limits of the CV (0v 5V). The patterns of the 8 steps are under the control of an ADC, however each step can be set manually too, to overwrite the ADC pattern if desired.Some time ago kind fellow CJ Miller sent me some old EFM schematics to upload them to my site. One was the ADC flash, based on LED driver ICs (LM3915). I thought about the use for an ADC module for a modular synthesizer and came up with the idea of controlling the steps of a sequencer with it. But why use expensive or hard to get LM3914/15? so I utilized an ADC0801 (or even 0804) for that purpose. This IC accepts 0V-5V input, so i put a simple CV processor upfront the ADC, with two additional comparators to drive indicator LEDs for voltages greater than 5VA or less than 0c.
bottom shot via oldmanfury
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