We found this circuit in the Radio Electronics magazine of May 1977. The circuit has the frequency given by the components according to the formula next to the diagram.
This circuit uses an SCR as a rectifier and controls the charge of a 7 to 24 V battery. The...
This circuit was obtained in the SGS manual of linear integrated circuits of 1982. The transistor can be...
This filter with the operational 741 passes the frequency range between 300 Hz and 3,400 Hz. This...