This circuit uses common components at the time of its publication in the 1980s. The circuit can be made with modern equivalent transistors. The input signal is sinusoidal.
Found in a Popular Electronics from the 90s, this circuit is suitable for communication between rider...
This crystal oscillator produces a signal in the 27 MHz band, depending on the crystal. The...
This circuit operates at the frequency of a small transmitter up to 27 MHz, triggering a relay from...