20150103 - Arduino based LC meters

Post date: Jan 3, 2015 12:49:52 AM

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...