Found in American documentation from the 90s, this circuit triggers a buzzer with a Sonalert-type oscillator when the temperature of the sensor reaches a certain value set in R2.
This circuit was found in a 1987 edition of the United States' Hands-On Electronics magazine. The...
The presented project is simple, but efficient in medium distance irrigation. In this circuit, the time...
This circuit mimics the sound of a siren when we turn the axis of the small DC motor. The...