Machines / CV-3PO
CV-3PO
Four channels of control voltage, each one set by hand on its own slider.
CV-3PO is a Eurorack module with four channels of control voltage, each set by its own slide pot. Step through pitch sequences, sweep a filter or hold a steady voltage in your modular rig.
An LED on every channel shows what it sends. Press record, move the sliders, and CV-3PO plays your moves back on a loop.
Each channel switches between 0–5V, 0–10V and ±5V, so it fits the rest of your rig. Calibration per channel and a 12-bit DAC keep every voltage accurate.
Four sliders, two buttons and six LEDs: everything you need sits under your hand.
How it plays
Three voltage modes per channel
Switch freely between 0–5V, 0–10V and ±5V bipolar output on each of the four independent channels.
Record and play back
Record your slider moves at 20 Hz and play them back on a loop. A steady voltage becomes a moving sequence.
12-bit, calibrated per channel
The DAC and per-channel calibration tables keep the output accurate and repeatable in every mode.
Every control under your hand
Four slide pots, two buttons and LED feedback. Every move changes the voltage at once.
Specifications
| Processing | |
|---|---|
| Processor | ATmega4809 (@ 20 MHz) |
| DAC | MCP4728, 4-channel, 12-bit |
| Output | |
| Voltage modes | 0–5V unipolar, 0–10V unipolar, ±5V bipolar |
| Channels | 4 independent analog CV outputs |
| Interface | |
| Controls | 4 slide potentiometers (10-bit ADC input) |
| Buttons | 2 tactile buttons (left/right) with debounce |
| Reset | Dedicated analog threshold reset input |
| LEDs | 6 in total: 4 channel indicators (PWM) and 2 button status |
| System | |
| Switching | 4 relay-driven digital outputs |
| Connectivity | I2C (SDA/SCL) for DAC communication |
| State storage | EEPROM: keeps the channel modes through power cycles |
| Recording | 4-channel potentiometer recorder, 20 Hz sample rate (about 10 seconds in total) |
| Calibration | Per-channel, per-mode DAC margin calibration and an LED brightness curve |
A question about CV-3PO, or an idea for it? Send an email.