This circuit allows control of loads of up to 1 A with voltages from 3 to 15 V. The transistor must be equipped with a heat sink and the power supply must not be of the type without a transformer.
We can use this circuit to connect low impedance microphones and even small speakers used as a...
This alarm circuit is from a 1987 publication, however the components used are still modern. The...
In the figure we have the way to implement a comparator for voltages of opposite polarities. The...