This circuit generates short pulses. The transistor can be a 2N2222 or BC548 and the frequency is given by the resistors and the capacitor that can be changed.
This basic voltage comparator circuit has a reference voltage given by a zener diode. The input...
With this circuit we can activate a relay with a simple touch on the sensor. The relay can be 6 or...
This circuit uses a thermistor or NTC as a temperature sensor and provides the indication on an...