Staircase light circuit electronic
Switches S1 and S2 are definitely the two micro-switches, which give low inputs towards the respective de-bouncing circuits. Every de-bouncing circuit is constructed close to two NAND gates linked back to back. The de-bouncing circuits make sure a clean, bounce-free pulse at the output each time the micro-switch is pushed and released. The outputs from the two de-bouncing circuits are ORed working with diodes D1 and D2 (1N4001). So each time you push and release both of the micro-switches, you will get a positive-going pulse at the junction of the cathodes of diodes D1 and D2.
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.