Hello all,
I am attempting to modify the following circuit for use with my existing power supplies / motors:
http://cratel.wichita.edu/blogs/tommcguire/files/2007/08/cheapstep_r1.jpg
I have two separate DC power supplies: one rated at 12 V / 2 A, and a second rated at 3.2 V / 6 A. The motor I am using requires 2.8 V / 2 A. I am modifying the circuit above by using the two different power supplies instead of one, so that I do not have to drop the voltage to power the motors. I am doing this by grounding the source of the MOSFETs to the 3.2 V supply, removing R2 (light bulb), and connecting the outputs of D1-4 to the V+ of the 3.2 V supply. This is then isolated from the 12 V supply powering the ICs by removing the trace between R1 and D1.
When I do this, my power supply begins turning on and off and the motor randomly jitters. Does this outcome make sense to anyone?
Thank you!
I am attempting to modify the following circuit for use with my existing power supplies / motors:
http://cratel.wichita.edu/blogs/tommcguire/files/2007/08/cheapstep_r1.jpg
I have two separate DC power supplies: one rated at 12 V / 2 A, and a second rated at 3.2 V / 6 A. The motor I am using requires 2.8 V / 2 A. I am modifying the circuit above by using the two different power supplies instead of one, so that I do not have to drop the voltage to power the motors. I am doing this by grounding the source of the MOSFETs to the 3.2 V supply, removing R2 (light bulb), and connecting the outputs of D1-4 to the V+ of the 3.2 V supply. This is then isolated from the 12 V supply powering the ICs by removing the trace between R1 and D1.
When I do this, my power supply begins turning on and off and the motor randomly jitters. Does this outcome make sense to anyone?
Thank you!