The circuit shown was found in Intersil documentation from the 90s. The formula allows to calculate the voltage obtained as a function of the values of the resistors.
This circuit was found in Popular Electronics from 1993. The 1458 consists of a double 555. The...
In this application we use an additional input circuit to enable the logic command with keys,...
This configuration was found in an old American documentation from the 80's. The circuit admits more...