From an old dust buster I've got this electro motor, the included battery pack and the charger:
I ripped everything apart (the dust buster was broken) and the motor still works. After playing around with it for a while and letting it lying around for about two weeks it suddenly revs a lot slower. I supposed the battery pack was drained so I hooked up the battery pack to the charger and let it charge for a night. Unfortunately the motor still turns very slow.
Since I want to use this motor for my first home robotics project (making a kite fly with my computer), off I went to the local electronics store where they measured the charger to give 16V (even though it says 21V) and the battery pack to give about 5V. I then hooked up the motor directly to the charger, but unfortunately it doesn't even move an inch then.
So now I wonder:
- Why doesn't the motor spin at all when hooking it up to the charger? (Could that be because the 250mA is too low?)
- Why doesn't the battery pack charge at all? (this bothers me the most!)
All tips are welcome!
[EDIT] Just some more info on the batteries: there are ten 1.2V and 1700mAh batteries, which makes it a 12V battery pack. The question arising from this:
- Can it be that the battery pack is not charging because it is a 21V charger on a 12V battery pack? Do I need to put a resistor in between? And if so; what kind of resistor?