This filter, with a cut-off frequency of approximately 1 kHz, has a high Q and employs two operational ones. The power supply must be symmetrical.
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....