In the figure we have the way to implement a sinusoidal oscillator with the 4093 IC. The component values are given by the table. The circuit is from a Popular Electronics from the 90s.
We found this circuit in a Radio Electronics from May 1966. The sensor is a photocell, and the...
By pressing and releasing S1 the relay closes its contacts for a time that depends on the value of the...
The correct connection of speakers and tweeters in a speaker to obtain better sound quality,...