This bench circuit was found in Radio Electronics magazine from June 1958. The circuit does not have an external power supply. The circuit generates signals from 12 Hz to 180 kHz in 4 bands.
This circuit is from an Italian magazine Radio Elettronica of January 1977. The circuit shows how...
This is one of the possible timer configurations with the 555. We found it in October 1986 Radio...
This circuit was found in a 1969 US documentation. It provides a signal that can be externally...