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.
We found this circuit in the March 1992 issue of Radio Electronics magazine. The circuit has a...
This circuit is from a 1988 documentation, but uses components quite common today. The circuit...
Twin-T oscillator are designed to produce sine low frequency signals. These oscillator are...