This circuit is from 1999 documentation. The integrated circuit used is not very common today. Both transistors are used if the motor current is greater than 500 mA.
This circuit is from an August 1984 Radio Electronics magazine. It monitors the state of a RAM...
Analog Devices suggests this circuit in documentation from the 1990s. The circuit is for 75-ohm...
This circuit, which can be built with several CMOS gates, was found in the March 1996 issue of...