Found in a Popular Electronics from the 90s, this circuit uses common components with several operational options, including the use of an optocoupler that allows its application in a shield.
This circuit was obtained from a European magazine of the 1990s. The integrated circuit used is...
Using a ceramic resonator, it is possible to vary the frequency between 4.9 MHz and 5 MHz. The...
In the figure we have the way to obtain a monostable action by lighting an LED for a certain time...