This circuit was found in the December 1992 Radio Electronics magazine. Range depends on optical capabilities and also weather conditions.
Using Linear Technology's LTC4252-1, this circuit was found in a 2005 manual. The circuit makes use of...
The mark-space relationship or active cycle of this oscillator can be programmed by the values of...
This simple alarm with integrated CMOS sounds a piezoelectric transducer when the sensor circuit...