This circuit was found in a Popular Electronics documentation from the 90s. It is possible to switch the frequency of an oscillator by voltage. The circuit can act as a shield.
This circuit was found in Radio Electronics magazine from September 1959. The circuit emits a loud...
This interesting game was found in a 1987 publication, but it is very simple and can be easily...
This circuit for the logic control of the 555 in a power supply was found in the October 1989...