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20150103 - Arduino based LC meters

posted Jan 2, 2015, 4:49 PM by Onno Benschop
Denis VK6FADF writes in:

Daniel talked of unknown capacitance. Brought to mind the arduino-based LC meter designs I've seen. 

Came across another just now...
The above uses a pulse to excite the LC tank circuit and then measures the decay frequency. Others use a fee runnig oscillator and measure the frequency of the stable output.

Similar to the below...