The Power Box

The Great Cable Disaster™

Posted by TheBrightKnight on February 18, 2025 · 6 mins read

Welcome back, my fellow cable-overlords!

I honestly have no clue where to start with this one. This project? Oh, it’s just my longest, biggest, most complicated, most hair-pulling, sleep-depriving, “why do I even do this to myself” project ever. But hey, I survived, I learned a ton, and now you get to learn from my chaos. Who knows, maybe you’ll even build one yourself!

So, after two years of trial, error, and moments of existential dread, I present to you – drumroll – The PowerBox!



The Great Cable Disaster™

Now, if you’ve dabbled in astrophotography for more than five minutes, you’ve probably encountered The Great Cable Disaster™. Cables everywhere. Dangling. Tangling. Creating their own gravity wells.

Maybe you’ve had a meridian flip that turned into a full-blown rig flip (bonus points if something snapped in the process). Maybe a rogue cable decided to yoink your expensive camera’s USB connection straight to the afterlife. Or, if you’re extra lucky, a random neighborhood cat used your rig as a jungle gym, and all your night’s hard work turned into a gallery of not-so-artistic star trails.

Even when you think you’ve got cable management under control – spoiler alert – you don’t. Not for long, anyway.

So, like any good problem-solver (or desperate hobbyist on a budget), you go online. And what do you find? Power boxes! The magical fix! Only, oh wait… they cost a small fortune. Because of course they do.

That’s when I said, “Enough of this!” and decided to build my own. But not just any DIY power box – I wanted something better, smarter, and, most importantly, way cheaper.

And I did it. It’s beautiful. It’s powerful. It’s got more bells and whistles than a spaceship. Voltage readings? Check. Load monitoring? Check. Full control over each output? Oh yeah. The PowerBox isn’t just a power solution – it’s the power solution.

The Must-Have Features:

  • Controlled DC Outputs – At least 4 of them, because why stop at one?
  • Controlled RCA Output – Dew heaters love these, and we love dew heaters.
  • Always-On Outputs – Because some things just need to stay powered, like your unwavering astrophotography obsession.
  • Independent Voltage & Amperage Readings – So you actually know what’s sucking up all your power.
  • Robust Outputs – No wimpy connections here; we’re talking serious power handling.
  • Temperature & Humidity Sensors – For automatic smart dew heater control. Fancy, huh?
  • Special Ports for Extra Accessories – Bluetooth modules, external sensors, future gadgets… whatever your tinkering heart desires.
  • ASCOM Support – So it plays nice with N.I.N.A and other software.
  • Custom Software – For remote control, tweaking settings, and looking extra cool.

Naturally, there were incidents along the way. Burnt boards. Exploding components. A few choice words yelled into the void. So, I added some extra protections:

  • Reverse Voltage Protection – Because mistakes happen.
  • High/Low Voltage Protection – Because gear is expensive.
  • High Load Protection – Because you will try to power everything at once.
  • Temperature Protection – Because nothing should melt.
  • Theft Protection* – Because of people.
  • Wife Protection* – Because sometimes you need to justify why you just bought another rig.

Fine print: These last two don’t actually exist, but hey, one can dream.

Enter: The Pro Version

Of course, I didn’t stop there. As the project grew, I got feedback (and more wild ideas), so I ended up making two versions:

  1. The Essential – The basic-but-awesome version with all the must-haves.
  2. The Pro – Because “Pro” sounds cooler, and I wanted to add even more stuff:
    • A USB 3.0 hub with 4 USB3.0 and 2 USB2.0 ports.
    • A dedicated 5V power line for the hub and other goodies.
    • More DC outputs, because why not?



But Wait, There’s Software!

What’s the point of fancy hardware if you don’t have killer software to match? Here’s what I made sure to include:

  • Smart Heater Control – Based on temperature & humidity, because logic is nice.
  • Live Amperage Graphs – See power usage in real time!
  • Total Session Power Monitoring – So you know exactly how much juice your setup is drinking.
  • Customizable Output Names – No more guessing which port does what.
  • Flexible Control Modes – PWM or On/Off? You decide!
  • Remote Access – Control your PowerBox from anywhere, including your phone.
  • Software & Hardware Updates – Because future-you will want even more features.

So, my dear reader, are you ready to embark on this journey of DIY brilliance? Keep reading – trust me, it’s worth it.


Want the PCB, microcontroller, components, CNC or 3D prints and pre-installed firmware delivered to you?

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~The Bright Knight