Submit your Ask an Engineer questions for tonight’s show #AskAnEngineer

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  3. Reply to this blog post.

We’re looking forward to seeing your questions answered on the Adafruit Ask an Engineer videocast tonight, Wednesday March 12, 2025.

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1 Comment

  1. John S
    March 12, 2025 at 2:16 pm

    Hey, I want to power a small board using a SuperCap so that I have enough time to run some shutdown stuff (like sending some IR commands, etc) which don't have to run to completion.

    So I figure I need to limit unrush current, and I also want my MCU to have brownout detection so I know when the power goes away, so it can start the shutdown process.

    The basic idea is to power the device from a TV, when the TV goes on, check if the other device is on. If not, send IR power command. If it is, goto sleep. Loop forever checking for status.

    If the source power (TV) gets shutdown, the SuperCap provides enough power to send the shutdown IR command(s) to the remote device if it's not already turned off.

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