This circuit is from an old American documentation from the 70s. Transistor 2N3904 can be replaced by BC548. The relay must have 100 mA of maximum current.
Small inverters can help to obtain high voltages from batteries. Although the switched inverters that...
It is an ideal assembly to be implemented as work by students of digital electronics courses, as...
In this very simple circuit, the LED flashes at a frequency of 60 Hz. It is convenient to check the...