This is a circuit that prevents an upload of the firmware, when switch is closed.
When open, the controller can be uploaded with new or changed firmware
Regards
Robert
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Hi,
Finally I have my rotator fully working but with a small problem.
I use a DRV8825 with a NEMA 14 working fine with PCB Gerber.
The only problem is the board fries my LEDs as soon as it start the power.
With a tester I measured 11.53 volts.
Tryed different LED lights with same result, they are fried.
Any help?
Finally in the PCB there is a second interruptor which doesn't seem to do anything, conector J1 "PRG SW",
Is that all right?
Best regards,
Joaquin.
P.S. I am trying to make a 3d design for the mechanical part that I will share if goes fine. Newbe with fusion 360.
Ok,
I found out the problem: the light led I was using was meant to be used for a lower voltage.
So by now everything is working fine, except the J1 PRG Switch but I think I will leave this without using it.
I am finishing a 3D design I will share as soon as I have everything ready.
Best regards,
Joaquin.
J1 PRG Switch
This is a circuit that prevents an upload of the firmware, when switch is closed.
When open, the controller can be uploaded with new or changed firmware
Regards
Robert