I am working on a display. I have 2 small (3 watt) 12VDC permanent magnet gearmotors that run about 30RPM on a 5VDC USB hub power pack. I have a faceted ball on each motor and 2 USB snake lights behind to light them, the effect is similar to a star ball. But I would like the speed lower.
I thought wiring 2 motors in series would give each motor 2.5V and reduce the speed, but when powered up one motor spins full speed with the other motor stopped. Applying pressure to the shaft of the spinning motor causes it to stop fully and the other motor to spin full speed. If I apply pressure to both motor shafts the motors go full speed one at a time, switching back & forth quickly.
I am not an electrical engineer and was wondering if an electrical engineer could explain this, or if this is not normal for DC motors and they should share the power.
I thought wiring 2 motors in series would give each motor 2.5V and reduce the speed, but when powered up one motor spins full speed with the other motor stopped. Applying pressure to the shaft of the spinning motor causes it to stop fully and the other motor to spin full speed. If I apply pressure to both motor shafts the motors go full speed one at a time, switching back & forth quickly.
I am not an electrical engineer and was wondering if an electrical engineer could explain this, or if this is not normal for DC motors and they should share the power.