This variable frequency oscillator for radio transmission covers the range from 1.6 MHz to 20 MHz, depending only on the coil used. The circuit is very stable and can be used in amateur equipment.
This circuit uses a common multimeter on the voltage scale to measure the beta gain of a...
This simple optical alarm circuit was found in the 1991 Electronics Experimenter Handbook. The...
This circuit uses an audio output transformer found in old transistor radios. Power output is...