This circuit was obtained from a 1967 General Electric manual. The circuit makes use of absolutely current components. Similar versions from other sources can be found in this section.
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...