This circuit also appears elsewhere on this site, obtained from other sources. This is an 80's American schematic book. Instead the lamp can be used white high-brightness LEDs.
Found in Popular Electronics from the 90s, this circuit turns off an appliance at the end of the...
The integrated circuit used in this application is no longer common. The circuit is from the...
In the figure we have an audio amplifier suitable for portable applications in both mono and...