my final yr project is to control the servo motor using micro controller, i have planned to use a relay but i am not sure which one to use. I am using ULN 2003 to drive the relay which is driven by a +12V supply but the motor that we are using is +4.8V-+6V, so which relay rating should i use?? please reply
I wonder what do you need a reley for?
There is no need for a relay, unless you intend to switch the positive side of the power going to the servo .. see attached picture ..
To operate 4-6V servo you have to step down voltage from +12 to, say +5V (using for example 7805 voltage regulator) and program a mocrocontroller to send pulses (between 1ms and 2ms every 20ms) to the servos's control wire ..
@IanP:
I need to switch off the motor and is way i had planned to use a relay. I just didn't know which pin of the relay should be considered as input and which as output because i didn't find the pin configuration anywhere. I have got a 5V relay with me which is Goodsky gs-sh-205t...how to connect this to ULN 2003??
@IanP: one small doubt, should i connect the output of the ATMEL 89S52 to the relay or to the gate of MOSFET?? because in the above cartoon the control circuitry is connected somewhere else. thats y this doubt
I meant what is exactly mentioned in the above cartoon, thanks a lot for that
Can i directly connect the output of ULN 2003 to the GATE of the MOSFET....i intend to do the same operation that a relay does with the pulse, so can i use ULN 2003 as a driver to the MOSFET?? suggestions pls