Motor Cortex
Components Needed
Components Needed
A bidirectional and bipolar 4 way sequential switch. Send clock pulses in to select which I/O is actively connected to O/I. Handles the full range of eurorack voltage levels safely. Handles AC or DC signals just fine, though it may produce a click when used with some audio signals. Has optional current limiting which can be included to protect your other modules from being patched output to output accidentally, or omitted to better preserve gain levels. Patch one of the gate outputs or an external signal to the reset input to reduce the number of switch paths. When the sleep input is sent high, the module will halt.
A bidirectional and bipolar 4 way sequential switch. Send clock pulses in to select which I/O is actively connected to O/I. Handles the full range of eurorack voltage levels safely. Handles AC or DC signals just fine, though it may produce a click when used with some audio signals. Has optional current limiting which can be included to protect your other modules from being patched output to output accidentally, or omitted to better preserve gain levels. Patch one of the gate outputs or an external signal to the reset input to reduce the number of switch paths. When the sleep input is sent high, the module will halt.
The logic level for the clock, reset and sleep inputs are determined by a voltage divider. We originally chose 100k/1k resulting in a switch point of about 100 millivolts, however we found this is too sensitive. We recommend changing the 1k (you can find it close to U1 / the middle board connecting pin header / the "insert soul here" graphic) to a 10k, resulting in a switch point of about 1 volt and better stability. Future board revisions will have this changed.
The logic level for the clock, reset and sleep inputs are determined by a voltage divider. We originally chose 100k/1k resulting in a switch point of about 100 millivolts, however we found this is too sensitive. We recommend changing the 1k (you can find it close to U1 / the middle board connecting pin header / the "insert soul here" graphic) to a 10k, resulting in a switch point of about 1 volt and better stability. Future board revisions will have this changed.
When building, start with the lowest components first such as resistors, capacitors, ICs, then diodes. The resistor labeled 1k* is the optional current limiting resistor. If you want to include current limiting DO solder in this resistor and DO NOT close the solder gap. If you would rather omit current limiting to preserve gain levels, exclude this resistor and close the solder gap. Solder the SMD components and board connecting pin headers to the upper board before soldering the I/O jacks as the lower components will be very difficult to reach with the jacks in place. Place the board connecting pin headers in their homes in both the upper and lower boards while soldering to ensure correct alignment. After all SMD components and pin headers are soldered, place the I/O jacks and LEDs in their homes and put on the faceplate while soldering again to ensure correct alignment. The LED symbol indicates which direction the LEDs should be installed - in this case long leg up, short leg down.
When building, start with the lowest components first such as resistors, capacitors, ICs, then diodes. The resistor labeled 1k* is the optional current limiting resistor. If you want to include current limiting DO solder in this resistor and DO NOT close the solder gap. If you would rather omit current limiting to preserve gain levels, exclude this resistor and close the solder gap. Solder the SMD components and board connecting pin headers to the upper board before soldering the I/O jacks as the lower components will be very difficult to reach with the jacks in place. Place the board connecting pin headers in their homes in both the upper and lower boards while soldering to ensure correct alignment. After all SMD components and pin headers are soldered, place the I/O jacks and LEDs in their homes and put on the faceplate while soldering again to ensure correct alignment. The LED symbol indicates which direction the LEDs should be installed - in this case long leg up, short leg down.
