This circuit emits a warning sound when night falls. The circuit is from a Hands On Electronics from the 90s. The Sensor is a common LDR and R6 adjusts the trigger point.
This wireless stapler transmits telephone conversations to an FM receiver at up to 50 meters. The...
This automatic switch for multiple loads was shown in the May 1983 issue of Radio Electronics...
Created to serve as a booster for TV signals in the UHF band, this circuit was found in the March...