This circuit was suggested by Motorola in a 1969 publication. It makes use of components of the time, but both the FET and the bipolar may be general purpose current types.
Originally this 2000 circuit was designed to be a switch to the parallel port, but with 5 V or...
Activating a relay from pulses (from a monostable, for example) can be useful in many types of...
This circuit converts the voltage from small fixed sources of 6 V or 12 V into 3 V for powering...