Multimeters can be as cheap as $10.00 but go up to thousands for professional, laboratory-quality ones. You can buy an excellent multimeter of sufficiently tough build quality and functionality ...

His solution is to repurpose an analog multimeter. The meter is interface with the toggle pin and a trimpot calibrates the needle. This way the needle jumps when the processor is busy and returns ...

But what if instead of a cheap-and-cheerful bench instrument your needs extend to a high-precision device, a really good multimeter? It’s a path [jaromir.sukuba] has trodden with his 6.5 digit ...