kanishka13
Junior Member level 1
unipolar stepper driver schematic
Hello friends..
I am using atmega32 to drive two unipolar stepper motors (5 wired) rated at 12V,~1A
I had been using ULN2803 to drive these stepper motors...
I face a strange problem....
1.The ULN gets heated very quickly.
2.I get varied results every time i power up the circuit
I am driving these motors with a 12V,1.2A power adapter..
I have damaged 4 ULN's already..
Every time I replace the circuit with a new ULN the circuit works fine initially...but later does not...
There is no whatsoever problem with the circuit...no Vcc-gnd shrt ciruit....
Could it be that ULN cannot sustain the 1.2A current??...so do i shift to another driver circuit?
What if I replace the driver circuit with L298-L297 motor driver circuit???
Mine is a unipolar 5 wire stepper motor with 12V supply....so what wud i driver circuiry be if i were to use l298-L297 driver circuit???:arrow::arrow:
Hello friends..
I am using atmega32 to drive two unipolar stepper motors (5 wired) rated at 12V,~1A
I had been using ULN2803 to drive these stepper motors...
I face a strange problem....
1.The ULN gets heated very quickly.
2.I get varied results every time i power up the circuit
I am driving these motors with a 12V,1.2A power adapter..
I have damaged 4 ULN's already..
Every time I replace the circuit with a new ULN the circuit works fine initially...but later does not...
There is no whatsoever problem with the circuit...no Vcc-gnd shrt ciruit....
Could it be that ULN cannot sustain the 1.2A current??...so do i shift to another driver circuit?
What if I replace the driver circuit with L298-L297 motor driver circuit???
Mine is a unipolar 5 wire stepper motor with 12V supply....so what wud i driver circuiry be if i were to use l298-L297 driver circuit???:arrow::arrow: