EEVblog #831 – Power A Micro With No Power Pin!

In this Fundamental Friday Dave will blow your mind as he shows you how you can power a microcontroller *without* a power or ground pin!
A potentially big trap for young and old players alike.
Can you guess how it’s done before the secret is revealed?
Forum HERE

SPOILER:
A tutorial on how ESD protection diodes in chips work and how they can be used, mostly inadvertently to power a chip through the input and output pins without having the power or ground pin connected.
This example uses an MSP430 microcontroller, but is applicable to almost any complex or simple CMOS chip.

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3 comments

  1. The first spin of the ARM processor was tested on a development board and functioned perfectly. They didn’t discover until later that the VCC line wasn’t even connected on the dev board. So there’s definitely examples out there of this.

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