- Fri Oct 29, 2010 4:30 pm
#112450
I had an EasyDriver 4.2 - hooked it up recently and poof.
I had only 12v power + gnd from PC power supply hooked up.
I had the motor hooked up correctly (I this thing breadboarded, and the motor has a .1" spaced connector at the end to plug in to the breadboard)
the 12v tests out at 12.2v (should be ok)
the motor tests at 34ohm for each pair, and no shorts between them (inf resistance between non-connected pairs)
any ideas What I might have done? - I DIDNT have any other pins connected - STEP and DIR and GND were hooked up to a non-powered Arduino Mega.
I did not have the enable pin connected, or anything else really... arg... I have 3 more but don't want to smoke any more of them... so I'd like to know what I did before I go doing it again.
On quick check - the STEP and DIR were hooked up to the +5v pins, but un-powered arduino. GND was hooked to the arduino GND...
FWIW I risked it and popped in another easyDriver, and the power LED came on - no problems. Which I noted the power LED didn't come on on the failed EasyDriver - but still SMOKE- no power LED, smoke... no power, just smoke poof.
I also checked the power supply 12.2v
I also checked for shorts on the stepper motor cable - A1 A2 34ohm, B1 B2 34ohm, all other combinations inf resistance.
I had only 12v power + gnd from PC power supply hooked up.
I had the motor hooked up correctly (I this thing breadboarded, and the motor has a .1" spaced connector at the end to plug in to the breadboard)
the 12v tests out at 12.2v (should be ok)
the motor tests at 34ohm for each pair, and no shorts between them (inf resistance between non-connected pairs)
any ideas What I might have done? - I DIDNT have any other pins connected - STEP and DIR and GND were hooked up to a non-powered Arduino Mega.
I did not have the enable pin connected, or anything else really... arg... I have 3 more but don't want to smoke any more of them... so I'd like to know what I did before I go doing it again.
On quick check - the STEP and DIR were hooked up to the +5v pins, but un-powered arduino. GND was hooked to the arduino GND...
FWIW I risked it and popped in another easyDriver, and the power LED came on - no problems. Which I noted the power LED didn't come on on the failed EasyDriver - but still SMOKE- no power LED, smoke... no power, just smoke poof.
I also checked the power supply 12.2v
I also checked for shorts on the stepper motor cable - A1 A2 34ohm, B1 B2 34ohm, all other combinations inf resistance.