We found this circuit in the March 1995 issue of Electronics Now magazine. The circuit has a frequency range determined by C1 and R3. The signal generated is square.
This circuit was obtained in a manual for radio amateurs from 1975. It is a circuit that allows the...
With this circuit we can control a load from 500 mA to 1 A, depending on the transistor, using a low...
This shield from the 60's uses a germanium transistor of the time and a common type of relay of...