Both IR sensors are connected to the interrupt pin of Arduino, and they detect the falling wave. The purpose of using interrupt is that, it improves the efficiency of system. A LCD is connected to Arduino and measured speed is shown on LCD. When car moves in front of the first sensor, ...
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Arduino Nano: Size 44x18x15mm Weight 5g Endurance power generator sketch Arduino generator for the laser (power and period) Endurance MO1 PCB Endurance MO1 PCB is needed to use Arduino board. Size 50x23x5mm Weight 6g Input voltmeter (optional) Input voltmeter measures input voltage. Input curr...
So whenever a metal is brought near the coil, the impedance of RLC changes making the signal to change resulting in variation to sound generated in speaker. You can also check this Arduino based metal detector. Common Tips: Enamel should be removed at the tips of coil for soldering connection...