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 well-known configuration, used in many car radios, is from the Philips Data Book of 1990. The...
With this circuit it is possible to expand the voltage range of a common multimeter, also...
This circuit for very long-time intervals was found in the March 1993 Radio Electronics magazine. Times...