1. Touch the power switch to turn on ELF mini V2.0.
2. Press number button 7 on IR remote control.
3. Ultrasonic sensor will detect if any car needs to
enter the parking lot; if yes, open the gate that
controlled by servo, and count 4 Digital LED Module.
4. If a car needs to leave the parking lot, use IR
remote control to open the gate, and number on
LED segment display will reduce by 1.
Coding - Parking Lot System
How to play
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