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Swapping coins cells for capacitors for noise filtering
Posted: March 27th, 2010, 11:00am MDT by Mike Szczys
Here’s an interesting idea: replace a disposable coin cell battery with a capacitor in order to filter the noise from an external power supply. [David Cook] is taking advantage of the falling costs of digital calipers. He’s mounted one on his milling machine but noticed that with an external power supply the readings would sometimes [...]