The transistor can be a BC548 and the coil has the following characteristics for 1 MHz. L1 has 80 turns of wire 28 in a ferrite rod and L2 of 30 and 40 turns.
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...