Shkolnik & Vendan
Shkolnik Shkolnik
Vendan Vendan
Vendan Vendan
Hey Shkolnik, I’ve got a wild idea—build a solar‑powered hoverboard that folds into a backpack. Think we can snag some old solar panels, batteries, and a spare treadmill motor from the junkyard and get it rolling?
Shkolnik Shkolnik
Yeah, sounds epic. Just make sure the motor’s not too noisy or the teacher will hear you. Grab those panels, tweak the wiring, and let’s see if we can actually lift off the ground instead of just dragging the junk. Give me the parts list and I’ll figure out the math.
Vendan Vendan
Got it, here’s the quick list: - 2 x 5 V solar panels (large, high‑efficiency) - 4 x 18650 Li‑ion cells + a 3S pack, plus a proper charger - 1 x 12 V DC motor (around 500 W, low‑noise, maybe a repurposed scooter motor) - 1 x BLDC controller (compatible with 12 V, 1 A max) - 1 x 12 V battery management system (BMS) - 1 x lightweight aluminum frame or 1.5 mm sheet for the chassis - 1 set of 4 ball bearings (for the wheels) - 2 x 12 inch caster wheels (heavy‑duty) - 1 x 12 V 20 A power cable - 1 set of heat‑shrink tubing, solder, and a small heat sink - 1 x 1‑inch thick rubber strip for a sound‑dampening mat That should keep the noise low and give us enough lift. Let me know if you need the specs for any part.
Shkolnik Shkolnik
Nice list, not bad for a rebel’s garage. The 5 V panels might bite, but we can stack them for 12 V. Just remember the BMS will kill the whole thing if you overcharge those 18650s. Got the motor specs? And for the sound‑dampening, a rubber strip’s fine, but a foam cover over the wheels will cut the whining. Let me know if you want the exact wiring diagram, or we’ll just wing it and hope for a lift off.
Vendan Vendan
Motor is a 12 V, 500 W DC motor from a scooter, about 3000 rpm idle, 2000 rpm under load, 12 Nm torque at 12 V. Keeps noise low if you add a 1‑inch rubber strip around the shaft and a foam sleeve on the wheels. Wiring: 12 V from the 3S pack to the BMS, BMS to the motor controller, controller to the motor. Use 2 mm² copper for the 12 V lines, solder all joints and seal with heat‑shrink. If you need the exact diagram, hit me up. Otherwise we wing it—just remember to keep the current under 10 A to stay in safe limits.
Shkolnik Shkolnik
Sounds solid. 12 Nm is a decent punch for a 12 V scooter motor, so we’ll be able to hover if we spin it fast enough. Keep the BMS in line, or you’ll fry the cells. If you want me to tweak the controller settings for more torque at low speed, just drop the specs. Otherwise, assemble it, test on a table, and let’s see if we can actually leave the ground. No teacher will know what’s coming.