QT PY not reliable / burning out

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NuTrix
 
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QT PY not reliable / burning out

Post by NuTrix »

I have a very simple circuit, a 5s battery pack going to your 21v to 5v buck converter and then to the QT PY 5v with a 1N4001 diode.

I am using one PWM output to drive a speed controller for a motor.

It worked for 2-3 hours, then nothing, the QT PY was smoking hot and dead.
I put another QT PY in, good for a few hours then I also noticed it was VERY hot and then kaput.

Nothing else is hooked up, what's wrong??

Thanks

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NuTrix
 
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Re: QT PY not reliable / burning out

Post by NuTrix »

It is the QT PY SAMD21.

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Re: QT PY not reliable / burning out

Post by adafruit_support_carter »

Please post a photo of your setup showing how everything is connected. Including the speed controller.

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NuTrix
 
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Re: QT PY not reliable / burning out

Post by NuTrix »

Here is how everything is connected (diagram attached)..

When the battery is plugged, my code outputs a neutral PWM signal to arm the ESC and then after 10 seconds, it starts the motor
at a low RPM. And then the QT PY overheats and burn. Last time it worked fine for 2-3 hours.
Attachments
setup.png
setup.png (219.13 KiB) Viewed 143 times

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Re: QT PY not reliable / burning out

Post by adafruit_support_carter »

Can you post a photo of the actual setup?

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Re: QT PY not reliable / burning out

Post by NuTrix »

Sorry, it is disassembled now, but it was wired exactly as shown above.
Thanks

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