This IR light sensor circuit was found in the July 1992 issue of Radio Electronics magazine. It is tuned for 20 kHz modulated light.
This circuit is from a 70s documentation. The maximum sampling rate is 800 Hz. The operational...
This standing wave alarm (SWR) warns when a high SWR value may mean an overload for the...
This circuit has a very high input impedance and a very low output impedance. We found it on a...