Purchase AstroEQ

*Important Notice*

AstroEQ controllers are built to order and so availability is not guaranteed. Before ordering a controller or other accessories from this page, please get in touch with me first. The easiest way to get in touch is via the AstroEQ Forum - You can send either a private message to me (my username is TCWORLD), or post a message in the Availability section of the forum. Alternatively use the ‘Contact Us’ page on the menu above.


When ordering a controller, you should enter the username you used to contact me (if by forum) or your full name (if by e-mail/contact us) in the field provided. This will allow me to inform you when your controller is shipped and keep track of the orders.


If you order a controller through this webpage without contacting me first, you order may be cancelled and the money refunded to your PayPal account. To avoid unnecessary delays or hassle, please contact me BEFORE ordering.



Available Products

The following products are available to choose from:


AstroEQ Telescope Controller

This controller allows you to convert your telescope into a Goto telescope by acting as an interface between your RA and Declination axes and the EQMOD software. This setup allows you to use star chart software such as CdC and Stellarium to select and automatically slew to targets. You can also use EQMODs Polar Align utility and also perform PHD Guiding via the ASCOM platform.


The firmware and configuration for AstroEQ can be easily update using the free utility available from the ‘Downloads’ page. The controller can be configured to a wide range of different standard or non-standard gear ratios through which can be programmed via the utility. This means that if you decide to upgrade your mount in the future, you can easily transfer your AstroEQ controller to the new mount.


The AstroEQ controller has the following specifications:


  • Low power USB Interface – USB Hub friendly
  • Controls 2x Bipolar Stepper Motors – 6P4C RJ11 Connectors
  • Adjustable Current Limit to suit a wide range of motors (Up to 1.25A per phase)
  • Requires 12V DC Power Supply rated at least 2.5A (with 5.5mm x 2.1mm connector)
  • Built in Reverse-Polarity Supply protection for peace of mind
  • Compatible with EQMOD (required)
  • Compatible with PHD Guiding via EQMOD
  • From V4.5, ST4 port is included as standard. It is located next to the motor ports.

Front View:

Image of the Front of AstroEQ

Motor Connections:

Image of the Motor Connections of AstroEQ

USB and PSU Connections:

Image of the USB/PSU Connections of AstroEQ

RJ11 Cables

A pair of 3M RJ11 to RJ11 suitable for connecting AstroEQ to motors from the “Dual-Axis Motor Kit”. For custom motors you can use these cables also, but you will have to adapt one end of them to connect to your motors.

3 Metre RJ11 Cables:

Image of the Cables

Preprogrammed ICs for DIY

There are two IC's which need programming before you can use them, the PIC18F14K50 which requires programming so that it can act as a USB-Serial converter, and the ATMega162 which requires a bootloader so that it can be programmed via USB. If you do not have the capability to program these chips, I am now giving you the option of purchasing just the chips from me preprogrammed so you can drop them into your DIY circuit and be confident that the chips are programmed and ready to go.


Both ICs are DIP (through-hole) packages to make soldering easier. You should use a 20pin 0.3" wide socket for the PIC, and a 40pin 0.6" wide socket for the ATMega.

IC Pinout Diagrams:

Image of the Cables

AstroEQ PCB for DIY

This is the latest version of the PCB used in the purchase AstroEQs. The board is a professionally made 2-layer PCB with soldermask and silkscreen. The board is sold completely unpopulated and as-is (no components supplied).


I will provide an up-to-date BOM for the PCB when ordered - I can either provide a paper copy with the order, or send you a PDF. From time to time the hardware version changes to allow new features or improvements to be made to the PCB which sometimes includes a change in the BOM, as such I will need to make sure you get the BOM that matches the PCB at the time of order.

AstroEQ PCB:

Image of the Cables

AstroEQ Order Form

You can order your AstroEQ controller and accessories by using the form below. Select the controller and accessories you require from the drop-down menu below and then click the “Buy Now” button. You will be directed to a PayPal checkout where you can pay either by Debit/Credit Card or via your PayPal Account. I have elected to use the PayPal checkout system for your piece of mind.


For all forms, postage costs are calculated and added at the checkout. For EU and International customers the postage cost is higher, and the only way I can make the Paypal Checkout understand this is to add on the difference in postage cost onto the item price as indicated on the order forms below.


Please enter the username you used to contact me (if by forum) or your full name (if by e-mail) in the “Forum Username” field.


*Important Notice*

AstroEQ controllers are built to order and so availability is not guaranteed. Before ordering a controller or other accessories from this page, please get in touch with me first. The easiest way to get in touch is via the AstroEQ Forum - You can send either a private message to me (my username is TCWORLD), or post a message in the Availability section of the forum. Alternatively use the ‘Contact Us’ page on the menu above.


If you order a controller through this webpage without contacting me first, you order may be cancelled and the money refunded to your PayPal account. To avoid unnecessary delays or hassle, please contact me BEFORE ordering.



UK AstroEQ Order Form

* Options
* Forum Username (or name)

Europe AstroEQ Order Form

Please note that for the EU Order Form the the prices shown in the brackets is the difference between the UK and EU postage costs. I can't seem to get the paypal form to have different postage prices for UK and EU, so I add the difference in cost on to the item price.

* Options
* Forum Username (or name)

International AstroEQ Order Form

Please note that for the International Order Form the the prices shown in the brackets is the difference between the UK and International postage costs. I can't seem to get the paypal form to have different postage prices for UK and International, so I add the difference in cost on to the item price.

* Options
* Forum Username (or name)