Timer circuit

Timer circuit

Figure 2 shows this timer world. It employs IC NE555 setup in monostable manner. Initially, once you press transition S2, the monostable triggers and its particular output will go high regarding 10 min’s. Thereafter, its production goes low to supply a beep sound in the piezobuzzer as well as lights the red LED (LED2) implying that excitement time is over.

This schematic diagram come from circuit: Simple Electronic Muscular Stimulator.
Go to that page to read the explanation about above circuit design.

In the electrical sector, a schematic diagram is usually used to describe the design or model of equipment. Schematic diagrams are usually utilized for the maintenance and repair of electronic and electromechanical devices / units. Original schematics were made by hand, using standardized templates or pre-printed adhesive symbols, but nowadays Electrical CAD computer software is often used.

In electronic design automation, until the 1980s schematics were virtually the only formal representation for circuits. More lately, using the progress of computer system technology, other representations were introduced and specialized computer languages were developed, because with the explosive development of the complexity of electronic circuits, classic schematics are getting less practical. As an example, hardware description languages are indispensable for contemporary digital circuit design.

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