An old HP laptop with Debian hosting Klipper and Home Assistant. Waiting for an OTG cable so I could replace the laptop with a phone for less power and heat
On a related note, I solved the battery issue with my wall mounted Fire tablet (for an HA dashboard) by connecting the power supply to a smart plug and setting up an automation to only give it the juice for about 3 hours per day, spread throughout the day
I've done similar with an old Android tablet. Installed Fully Kiosk Browser to display the dashboard AND read the battery level - above 75%, switch off power...
But... automations only trigger when going past the threshold once, so if there's a random issue where HA doesn't see the battery drop below 10%, (had that happen a few times in the past), then I also have multiple triggers for 5% and 2%... to turn the power back on again 😉
Yeah, the tablet runs Fully Kiosk and I tried the same thing with the battery percentage thing and ran into the same issue, so I just simplified and made the automation time-based.
The tablet also likes to freeze a few times a day, so I also created an automation that toggles the smart plug power whenever HA loses connection to the tablet for more than 5 seconds, then toggles back to the original state at the start of the automation, which corrects the problem. Until the next time. But hey! It was only $60, so it's fine.
That's so cool! Nice work! I feel a certain kinship with anyone who also got tons of 3D printing XP by building, rebuilding, researching, modding, head-scratching, laughing, crying, screaming at an A8 lol.
This here is mostly fire prevention: Basically an updated stock motherboard, better PSU, an aftermarket MOSFET board for safety, thicker gauge wires with ferrule crimps for all the power cables, the bed is now attached directly to the thicker wires by way of crimp connectors.
The printing surface is upgraded to carefully cut and polished picture frame float glass. 😂
Added that sweet fan duct mod, a little Noctua 15mm (because it softened and jammed otherwise LOL), and printed that purple bracket at the library because the plastic decided to literally crumble away.
Also the adjustable Z-stop was nice but the PLA softened so it's a bit unpredictable, and the right motor will gently slip until it's engaged so the gantry needs to be leveled every time...I also can't guarantee that the Z rods are straight anymore because it requires such a Goldilocks level of tension I probably overdid it lol.
Oh yeah, I had to replace the main power cable because the one provided just...had a break in it.
It still works for small jobs though! And it printed all those parts for itself, so that's kinda the RepRap dream right there right??
Lol I feel like an amazing machine is in here somewhere if I bothered to research custom boards and stuff. The stock bearings are also terrible. But if I can bother someday I'll stick Klipper on it maybe.
It was a crazy, stressful journey...but I learned a ton of electronics stuff, and how to use a multimeter, and engineering stuff! XD
My Ender3V2's felt like such a crazy luxury by comparison. 😂