I was tired on the way home from work yesterday and I pulled over at the nearest Goodwill to stretch my legs and look around. I always find something, this time it was a new gameroom addition, a $3 claw machine bank toy. I got it home, loaded it with some D batteries I had, and it proceeded to do nothing. I reasoned it needed money since it was a bank, and this was correct. A terrible carnival theme started and, worse than that, the crane was not moving properly. Of the X, Y, and Z axis, only Y was working.
Ah, a challenge for my amusement!
I spent two hours of disassembly, alligator clips, wire tracing, and logical thinking before I found the problem: seized electric motors. Cost cutting was obvious throughout the unit: The wire gauge was the cheapest possible, the soldering was amateurish, and the wiring harness should have been zip tied. The design was well done though, I appreciated the thought to include cherry type motor cutoff switches for the X and Y axis. The Z axis (dropping the claw) is also completely controllable and has a good grip. The prize chute has an LED sensor to determine when a prize is dropped, another unexpected feature. Fixing the sized motors was easy: I pushed them manually in the direction I indicated through the joysticks and they sprang to life. I finished off the project with some lithium grease and a mod: clipping one of the speaker wires. My "prizes" are burned out old EPROMS from my arcade projects.
This joins my collection of VFD handhelds, here is a slightly out of date picture. Anyone else collect these on the boards?
