That’s true for these Vu meters repurposed as gauges for a Raspberry Pi server ... We saw a similar CPU load meter a few months back, and there was this mash-up of Nixies and old meters for ...
On a microcontroller, though, you’ll have to roll your own CPU load meter with a few parts, some code, and a voltmeter. We like [Dave Marples]’s simple approach to quantifying something as ...