Found in a 90s Popular Electronics, this circuit can power a miniature railroad with voltages of 15 V and currents up to 1 A. The circuit has soft start effects.
This circuit was obtained in a 1994 documentation. The assembly is very critical, and the circuit...
This circuit is from the 80's documentation. The integrated circuit is from the time but can be...
This sensitive sound or noise activated key can be used in an alarm system. The circuit is from an...