This lead-acid battery charger was found in a Popular Electronics from the 90s. The circuit has a maximum current of 2 A, being suitable for powering inverters in emergency lighting systems.
Found in a 1990 Electronics Handbook, this circuit causes an LED to flash when the phototransistor receives...
The circuit shown in the figure is recommended for applications where a visual indication is...
This circuit is a siren with manual modulation that, instead of exciting a speaker, excites...