External Motor Controller

Pegasus Astro

External Motor Controller

Regular price
$ 168.00
Sale price
$ 168.00
Unit price

This item is out of stock but you can place an order now and we’ll ship when it becomes available.


The external motor controller was designed to expand the focus capabilities of the Ultimate Powerbox v2 (supports a 2nd focus controller) and adds focus functionality to the Pocket Powerbox Advance. The device does not require a USB cable and can be attached directly to the EXT port of the Powerboxes. It can drive a large bipolar or unipolar stepper motor with high precision.



Controller support micro-stepping which can be configured via software to Full / Half/ 1/4 step and 1/8 step. This provides additional precision and a smooth rotation from the stepper motor.

Supported Motors

We have successfully tested and controlled the following stepper motors:

  • Pegasus Motor Focus
  • Starlight HSM 25 / 30 / 35
  • Starlight MSM 25 / 30 / 35
  • Starizona Micro-Touch
  • Starlight PDMS (Posi Drive Motor System)
  • Rigel nStep Motors
  • Moonlite Stepper Motor
  • Robofocus Stepper Motor

Please note that each motor requires its own cable due to different pin-out selection of each manufacturer.

No USB port is required

You do not have to occupy a USB port as the controller does not require a USB connectivity. Just plug the RJ12 port into the EXT port and the controller will be recognized from the powerbox software. Simple as that!

Second EXT port available

A second EXT port allows you to daisy chain future equipment or connect your environmental sensor.


The controller is fully protected against undervoltage, overcurrent, and overtemperature events.


Supply Voltage 12V DC Preferred. Accepts 8.2-V to 24V – depends of the motor
Drive Current 1.6Amps per motor coil
Motor Compatibility Unipolar and Bipolar Stepper Motors
Motor Output RJ45 Socket
Connectivity RJ12 Socket (Straight RJ12 to RJ12 cable) up to meters
Power Input Connector 2.1mm Centre Positive Socket
Dimensions 66mm x 66mm x 28 mm

Personal Upgrade Path

Buy risk-free: When it’s time to trade up you’ll get the most value for your used gear.