I have a tiny DC motor directly connected to this power supply. The motor starts just fine when the supply is set to 4.5V. I can then change the voltage to 6V and it continues to run just fine. However, if I try to start the motor at 6V it only runs in pulses (for about 100 milliseconds once every second). Also, if the motor is running at 6V and I apply significant load, it begins pulsing until I lower the voltage. I'm guessing both cases are explained by the larger current required to start the motor at a higher voltage, and to keep it running under load.
I have a few questions:
- What is actually happening to cause the pulses? Is my power supply overloading then "resetting" once every second?
- Is there something very simple I can add into the circuit to allow it to start at higher voltages (a momentary current spike)?
- Is there something very simple I can add into the circuit, perhaps a better power supply, to allow it to run under sustained load (a constant current increase)?