So, I have had a few other threads on this topic. This is one of them:
http://forum.allaboutcircuits.com/t...n-small-motor-is-connected-to-circuit.123530/
However, for whatever reason, I could never get enough voltage going to the motor. So, I abandoned that circuit, looked at a basic capacitor charging circuit, and built the following:
http://goo.gl/64XitO
(In the circuit, the 12V and 6.5V inputs are actually boost circuits attached to a 3.7V li-ion battery. The 100ohm resistor is where the motor is attached).
This works pretty well, and it ramps up the motor as expected. However, it causes the battery voltage to drop and the protection circuit to cut the supply. I measured the voltage from the battery once connected to the circuit, and it steadily drops to 3.2V before cutting out. What's happening?
http://forum.allaboutcircuits.com/t...n-small-motor-is-connected-to-circuit.123530/
However, for whatever reason, I could never get enough voltage going to the motor. So, I abandoned that circuit, looked at a basic capacitor charging circuit, and built the following:
http://goo.gl/64XitO
(In the circuit, the 12V and 6.5V inputs are actually boost circuits attached to a 3.7V li-ion battery. The 100ohm resistor is where the motor is attached).
This works pretty well, and it ramps up the motor as expected. However, it causes the battery voltage to drop and the protection circuit to cut the supply. I measured the voltage from the battery once connected to the circuit, and it steadily drops to 3.2V before cutting out. What's happening?
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