This circuit was obtained from an 80s factory manual. The integrated circuits used are uncommon today, but the diagram is for reference only.
The circuit below was found in the March 1990 issue of Radio Electronics magazine. The circuit...
The circuit shown in the figure causes the lamp to light up after a certain time determined by the...
This circuit uses a selector switch to select resistors for timings given in seconds. Capacitor C1 can be...