loading effect due to servo motor

[Jayk]

I have interface VS-2 servo motor with ATMEGA-32 micro-controller.When i apply source to the circuit due to loading effect voltage drops from 5v to 2v.I dont understand the problem. Is there any remedy to problem? My programming is correct.

 

[darkseid]

Hi

What kind of interface are you using between your uC and the servo motor and what device (MOSFET/BJT/IC) is driving the motor.

 

[Jayk]

Hi

What kind of interface are you using between your uC and the servo motor and what device (MOSFET/BJT/IC) is driving the motor.

I have directly connected the servo with microcontroller port where PWM are generated.
Please suggest me some interface so that loading effect does not occur.

 

[mrarslanahmed]

no matter how much small is the motor is its an inductive load and will require much more current as compared to current provided by the microcontroller... u need a driving circuitary

 

[ahme0307]

Try it with simple opamp buffer circuit.

 

[mrarslanahmed]

Try it with simple opamp buffer circuit.

I dont think any opamp would work even if its working as a buffer . I checked the data sheet of opamp 741 for reference and the maximum output short circuit current this ic can generate is 25mA . i dont think this power will be substantial to start the motor.

But opamp can be used to drive BJT to saturation easily.

may be you can find this circuit helpful.