Hi All,

I am very new to electronics and Robots. I have been trying to run a continous servo motor 4v to 6v. I have a battery power source of 9v.
I have the following question.

Since my power source is higher than my required voltage I wanted to use a resistor to lower the voltage, so my motor is not going to get damaged. I used the following formula to find out the resistor required to get this voltage.

R = (Vin - Vout)/current required which is (9-6)/.01 = 300 ohm

Since I didn't have a 300 ohm resistor I used a 330 ohm resistor.

When I connected the circuit without the motor an checked the voltage across the circuit with the resistor on, it gave me a reading of 8.90v. I was not very sure what was going on, so I went on to connect my servo motor to see if it works by passing the signal and voltage. To my surprise the motor didn't work. So checked the voltage across the circuit it was reading 2v.

I was a bit confused at this point, so I removed the resistor from the circuit and connected the servo motor straight to the 9v power supply and the motor started working.

Please can any of you tell me, if I am doing something wrong here. Why the motor didn't work with connecting to resistor Or do let me know if I have done something wrong with the calculations.

Thanks

I am very new to electronics and Robots. I have been trying to run a continous servo motor 4v to 6v. I have a battery power source of 9v.

Since my power source is higher than my required voltage I wanted to use a resistor to lower the voltage, so my motor is not going to get damaged. I used the following formula to find out the resistor required to get this voltage.

R = (Vin - Vout)/current required which is (9-6)/.01 = 300 ohm

Since I didn't have a 300 ohm resistor I used a 330 ohm resistor.

When I connected the circuit without the motor an checked the voltage across the circuit with the resistor on, it gave me a reading of 8.90v. I was not very sure what was going on, so I went on to connect my servo motor to see if it works by passing the signal and voltage. To my surprise the motor didn't work. So checked the voltage across the circuit it was reading 2v.

I was a bit confused at this point, so I removed the resistor from the circuit and connected the servo motor straight to the 9v power supply and the motor started working.

Please can any of you tell me, if I am doing something wrong here. Why the motor didn't work with connecting to resistor Or do let me know if I have done something wrong with the calculations.

Thanks