niranjan23
Member level 5
Hello!
I have problem with my stepper motor and ULN2803.
I interfaced Bipolar stepper motor through ULN2803 to PIC18F4550, I made code to run motor Clock wise It works on Simulation but not on Hardware!
Im using 12V 4 wire bipolar motor .
Im using this circuit .
Also I tested Unipolar motor on same hardware!! didnt work!!.
when I checked voltage using DMM at pin num 9 and 10 of ULN2803 I get 12V but when I checked voltage at output pins I get 2.3-2.5V and when I run sequence the voltage at output pin changes like 0 to 2.5v to 0v until sequence ends!! But my stepper motor doesn't rotate.. Why and how this is happning what is the problem Help me:---|:|!!
Thanks!!!
I have problem with my stepper motor and ULN2803.
I interfaced Bipolar stepper motor through ULN2803 to PIC18F4550, I made code to run motor Clock wise It works on Simulation but not on Hardware!
Im using 12V 4 wire bipolar motor .
Im using this circuit .
Also I tested Unipolar motor on same hardware!! didnt work!!.
when I checked voltage using DMM at pin num 9 and 10 of ULN2803 I get 12V but when I checked voltage at output pins I get 2.3-2.5V and when I run sequence the voltage at output pin changes like 0 to 2.5v to 0v until sequence ends!! But my stepper motor doesn't rotate.. Why and how this is happning what is the problem Help me:---|:|!!
Thanks!!!