Car Parking Guard Circuit Electronic

Car Parking Guard Circuit Electronic

Car Parking Guard Circuit Electronic

Simple Explanation:

The Q1 photo detector picks-up the infrared beam generated by IR LED1 and IR LED2 and reflected by the surface placed in front of it.
IR LED1, IR LED2 and Q1 are placed facing the car on the same line, a couple of centimeters apart, on a short breadboard strip fastened to the wall. Q1 picks-up the infra-red beam which generated by IR LED1 and IR LED2, and reflected by the surface placed in front of it.
If there is a obstacle the IR beam will radiate back to the IR sensor and the 20KHz modulated signal is given to the pin3 of LM567 through photo Darlington transistor, at this point the pin8 of the LM567 is turned to low and also gets locked to detect the 20Khz signal. By this the LM555 is turned low and disabled by this the led will remain lighting and buzzer makes the continuous sound to alert the driver.

This schematic diagram come from circuit: Car Parking Guard based IR Sensor.
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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