This circuit was found in the Linear Applications Handbook of the National Semiconductor of 1994. Some of the components used are not easy to obtain, but equivalents can be used.
This sensitive sound or noise activated key can be used in an alarm system. The circuit is from an...
This experimental flip-flip changes its state by the command of two push-buttons. The state is...
The transformer in this power supply can have a secondary winding from 1 to 15 A of current....