Stolen bike engine
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somebody just stole the engine off my bike today in Tucson, AZ. The bike wasn't stolen and the locks were fine; but the thief casually disassembled the engine in broad daylight, next to a huge parking lot with a lot of traffic.
The motorized bike community isn't too big in the US (or in AZ, for that matter), so if anyone sees a black bike engine for sale, please post any info you got. May I also add that a used motorized bike is basically worthless, it's not even expensive new (120$); but it requires a shit-ton of work and breaking in.
Any help or info would be appreciated,
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Hi, /diy/, I'm in need of some electronics advice. I am a complete beginner, and I can't stress that enough. A few years back I bought a bunch of resistors, white LEDs and some copper/normal wire, switches and that sorta thing (pictured) so my friend can walk me through a project but it never got off the ground.
Now I want to make this small armature for a "horseshoe" lamp on top of my desk on the wall, so I can have plenty of strong light from multiple directions for other DIY projects and miniature painting.
I've the stuff, I'm reading up on things and me and a friend even drew up simple scehmatics and how it'll be built. Thing is... it's been so long, I can't remember the resistance, voltage or anything of both the resistors or the LEDs.
Is there any way to find this out, perhaps by markings or tests that won't fry the fucking things? If it's any help, the resistors have a gold, black, brown and then green band of apparently varied (slightly) thickness. Final aim is to also connect the setup to the mains socket and the flick switch for ON/OFF and the two press switches (maybe) to turn on one side only for things like painting with directional light.
Vibrating TEFC motor
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So for a project I'm doing i took this motor of a lawnmower that has been sitting out in the open trough several winters.
After doing basic cleaning and checking for water and shit in critical places it seemed good to go and so it was.
Only problem, as soon as the power is applied (or it gets up to rev's) it starts to vibrate or even pulsate unhealthy.
Also, it seems to get rather hot even after 10..15 minutes of runtime.
Is that a problem and what might be the possible cause and fix if so. Bearings seemed to be solid, power consumption is acceptable 1.5A, wirings are dry and show consistent resistance and basic ohm test indicates usable capacitors.
Still, from experience with other motors, when activated with plain spindle, they seem to be near silent - similar to how this motor rotates right as i cut power.
Few things that i could imagine - misshaped plastic fan and threaded axle mount throwing things out of balance, deteriorated (but not dead) cap causing erratic running, sub-par assembly and component precision causing some scraping or eccentric rotation.