Hi All,
I am working on an Arduino based project that controls a motor based on temperature and light feedback. The temp and light cutoffs are adjusted by pots, and the motor driver is a dual driver PCB off Amazon. I plan to run the L9110s off board with the below trimmed down circuit, but currently the motor driver circuit is slightly different than the diagram. The unit will also have an optional off grid system with a small solar panel to trickle charge the system. I am considering running the Atmega off board as well, but undecided on that. The manual door option is not yet implemented either.
I've had seemingly endless little issues with this circuit, but mainly I have blown two Arduino's so far in not very much time. The first one blew the serial port so I couldn't upload any code and the second one took out the voltage reg (I assume, as it was blazing hot) and the 5V output was pushing 5.68V.
Are these flukes from prototyping and banging wires together or are there some issues with the circuit? Almost everything is soldered directly, as we were initially having issues with loose wires. Unfortunately, that makes swapping Unos a real bear. I was attempting to implement a motor voltage spike monitor system on pins A4 and A5 to act as endstops for the door. Worked perfectly on a different board with a basic circuit, I added it to this circuit and I just starting getting wild voltage fluctuations on the scope, with over a 5V swing. I started poking around and thats when I noticed the high rail voltage and the warm board. Previously I had endstop switches on digital pins to 5V with pulldowns to GND, pretty basic.
Apologies for the poor convention and hand drawn circuit, it's been a few years since working on any significant EE projects.
I would really appreciate any help you can offer!
I am working on an Arduino based project that controls a motor based on temperature and light feedback. The temp and light cutoffs are adjusted by pots, and the motor driver is a dual driver PCB off Amazon. I plan to run the L9110s off board with the below trimmed down circuit, but currently the motor driver circuit is slightly different than the diagram. The unit will also have an optional off grid system with a small solar panel to trickle charge the system. I am considering running the Atmega off board as well, but undecided on that. The manual door option is not yet implemented either.
I've had seemingly endless little issues with this circuit, but mainly I have blown two Arduino's so far in not very much time. The first one blew the serial port so I couldn't upload any code and the second one took out the voltage reg (I assume, as it was blazing hot) and the 5V output was pushing 5.68V.
Are these flukes from prototyping and banging wires together or are there some issues with the circuit? Almost everything is soldered directly, as we were initially having issues with loose wires. Unfortunately, that makes swapping Unos a real bear. I was attempting to implement a motor voltage spike monitor system on pins A4 and A5 to act as endstops for the door. Worked perfectly on a different board with a basic circuit, I added it to this circuit and I just starting getting wild voltage fluctuations on the scope, with over a 5V swing. I started poking around and thats when I noticed the high rail voltage and the warm board. Previously I had endstop switches on digital pins to 5V with pulldowns to GND, pretty basic.
Apologies for the poor convention and hand drawn circuit, it's been a few years since working on any significant EE projects.
I would really appreciate any help you can offer!
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