hello there!
currently i am using the ULN2003 to drive a stepper motor exactly as indicated here
http://wiredworld.tripod.com/tronics/stepper_ckt.png
I've got it working and testing perfectly accordingly to my project needs a few months ago. Now that i test it back... the motor is turning oddly so i hooked up some LEDs to check and everything ELSE is ok accept for one major problem.
The ULN2003 is only outputting around 0.6V to the motor when it's suppose to be 12V
Does anyone have any ideas why???
THANK YOU!
ps: i am using a 8255 PPI chip to control it and the output voltage of the PPI is around 3.7V
currently i am using the ULN2003 to drive a stepper motor exactly as indicated here
http://wiredworld.tripod.com/tronics/stepper_ckt.png
I've got it working and testing perfectly accordingly to my project needs a few months ago. Now that i test it back... the motor is turning oddly so i hooked up some LEDs to check and everything ELSE is ok accept for one major problem.
The ULN2003 is only outputting around 0.6V to the motor when it's suppose to be 12V
Does anyone have any ideas why???
THANK YOU!
ps: i am using a 8255 PPI chip to control it and the output voltage of the PPI is around 3.7V