PIR sensor and Bluetooth Module

(a)   is a sensor used to sense motion?

What is the name of the round metal can with a rectangle in the centre of the PIR sensor?

(a)  

What is the name of the lens on a PIR sensor?

• fesnel

• fresnel

• frensel

• frasnel

Which sensor is best for a burglary alarm?

• Ultrasonic sensor

• Pir sensor

tone(pin-number, __?)

• frequency

• speed

• sound

(a)   is a function used to stop the sound of a buzzer?

How many pins are on the pir sensor?

• 3

• 5

• 2

• 2

How many pins are on the Bluetooth module?

• 4

• 6

• 5

• 7

What pins are on the pir sensor?

• vcc, out, gnd

• vcc, signal, gnd

• vcc, in , gnd

What is the default baud rate of HC-05 in command mode for the Bluetooth module?

• 38400

• 9600