Raspberry Pi based inbuilt guider-computer

Introduction

This project is my attempt to design and build a compact, low-cost astrophotography station that combines a guider and a mount computer into a single unit. The panel is designed to be used with this case. 

Motivation

One of the biggest challenges in astrophotography is the cable mess—USB hubs, dangling power cables, and multiple computers add unnecessary complexity. Commercial guiders and PC-based solutions solve some of these problems, but they are often expensive and not very customizable.

Goals

Simplify cabling

• Instead of connecting the guide camera over USB, the system uses the CSI (Camera Serial Interface) port of the Raspberry Pi, reducing reliance on extra hubs and potentially minimizing issues caused by snagging cable.

Compact & cost-effective design

• The guider and the control computer are integrated into a single form factor.

• The system is designed to be budget-friendly, using widely available components while delivering performance at par with commercial astro-computers.

Future expandability

• Planned support for 12V DC power ports to power accessories directly from the guider unit.

• Modular design to add or swap sensors and cameras as needed.

• Planned case for NoIr camera module which will also allow it to be used with an OAG.

Dual use: astrophotography & visual observing

• Provides GoTo mount control for telescope pointing.

• Can act as a “single box” solution whether you’re observing visually or imaging.

Vision

The end result is a self-contained guiding and control hub that mounts directly on the telescope, minimizes external cabling, and makes setup in the field faster and more reliable. It should offer the usability of commercial astro-stations but with the flexibility and affordability of a DIY build.

Custom OS

The OS with pre-built Raspberry Pi camera driver can be downloaded here. Alternatively, the driver is submitted to the indigo repository as an optional driver. 

BOM

Assembly

1. Insert M2.5 X 6mm Phillips Round head Laptop Screws in the RPi HQ camera support.

2. Install the spacers

3. Install camera sensor

Note: remove camera mount attached to the camera body before installing. The camera mount can be attached back in later.

4. Finally route the cable. Please make sure that cable does not crease while doing so.

Guiding Test