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.
Pulses in sequence 1 to 10 are produced by this circuit. The pulses can be used to drive output...
This calibrated circuit was found in documentation from the 1980s. It makes use of an integrated circuit...
This is a amplifier for XTAL high impedance earphones or piezoelectric types. Current drain is...