This is a faster approach compared to typing using a keyboard. What is the range of the sound sensor? This sensor is capable of determining noise levels within 100 dB's or decibels at 3 kHz, 6 kHz ...

Ultrasonic Sensor Arduino Circuit Diagram and Explanation. The circuit diagram for arduino and ultrasonic sensor is shown above to measure the distance. In circuit connections Ultrasonic sensor module ...

Fig. 1: Author’s prototype Fig. 2: Block diagram of motion sensor alarm Circuit and working. The circuit diagram of the motion sensor alarm is shown in Fig. 3. It consists of a PIR motion sensor (MS1) ...