Circuit diagram of intelligent travel speed limit and exhaustion wake-up

Circuit diagram of intelligent travel speed limit and exhaustion wake-up

Nowadays, motor vehicles have entered ordinary families, but it also brings hidden dangers to traffic safety. In order to eliminate the hidden dangers of driving safety, the author has designed a circuit that can monitor the driving speed at any time; when driving on the speed limit section, you can set the upper and lower limits of the speed, or set the upper and lower limits at the same time. Use a tired wake-up device. The device has simple structure, low cost and convenient use, and has good development prospects.
1. The speed collection uses mechanical contact detection speed (using light to detect the speed of the tube, the cost is too high), the cost is low and the use effect is very good. Every time the wheel rotates, it triggers once, and the single-chip computer counts once.
2. When the range setting needs to set the range, press the upper and lower limit keys to enter the numerical setting, and the setting will automatically enter the working state after the setting is completed. It can be set at any time during work.
3. Each time the single-chip computer mechanical contact is triggered, the single-chip computer count value is increased by one, and the count value is calculated and sent to display every 1 second. If the range is set, the count value is compared with the set value, the green light below the lower limit lights up, and the red light above the upper limit lights up.
4. Tired wake-up uses timing control. When the scheduled time expires, the music piece is triggered to prompt.

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