This circuit was found in the April 1973 issue of Radio Electronics magazine. Using TTL technology, it was recommended for vehicles of the time. The circuit was connected to the contact breaker.
This antenna for the frequencies 146 or 440 MHz was found in a magazine 73 for Amateur Radio of...
This circuit produces 1 kHz square signals using the CMOS IC 4070. The frequency is given by the...
Found in a 90s PE Hobbyst Handbook, this circuit mimics the sound of a space gun. The components...