Equation Composer

Documentation and Examples

Installation and Power Requirements

By default, the Equation Composer requires a Eurorack case that supplies +/- 12V and +5. If your case does not include a +5V supply, it is suggested that you purchase a third-party power converter such as one of the following:

The Equation Composer can run off the +/- 12V supply without the +5V requirement, but an additional regulator and heat sink must be soldered on to the unit. The Equation Composer ships with a power regulator and heat sink in case you want to make this conversion yourself. Soldering is required.

heat sink kit

Heat Sink Kit (and mounting screws) - included with each Equation Composer. If you have a rack that supplies +5 volts, you don't need to install the power regulator or heat sink.

Check your eurorack case's documentation to insure proper installation. Typically the Equation Composer’s power cable should be installed with the red stripe on the bottom. Plugging in the power upside down can damage the Equation Composer, so please install carefully.

Current requrements when using 5V from rack supply:
+12V: 17mA
-12V: 17mA
5V: 165mA

Current requrements when using +/-12V supply only, with regulator + heatsink added:
+12V: 191mA
-12V: 17mA

If insufficient current is supplied, the output will sound extremely distorted.

Installing the optional power regulator

Just as a reminder, installing the power regulator is not normally required and should be your last resort. (See above.) Here are instructions for soldering on the power regulator:

Parts required

Step #1: Attach the heat sink to the regulator

Step #2: Carefully remove the rear circuit board

Remove the four mounting screws and gently remove the rear circuit board.

Step #3: Position the regulator on to the rear circuit board

Attach the regulator to the rear circuit board as show. Confirm the regulator's orientation before continuing.

Step #4: Solder the regulator's three pins as shown in the photo

It's best to solder the underside of the pins.

Step #5: Gently re-attach the rear circuit board to the module

Here's a photo of the completed installation. The regulator sticks out quite a bit.