Grade 3 Lesson 5 Smart Doorbell WarmUp Can

Grade 3 Lesson 5 Smart Doorbell

Warm-Up Can you get to the other side of the classroom without disrupting the lasers?

Mini-lesson What is the function of these sensors? Motion Sensor Temperature Sensor Smoke Sensor Are they suitable for their purpose?

Mini-lesson How can the design of a doorbell be made more effective using sensors?

Keywords Complete the keyword activity in your Student Handout: Sensor Doorbell Laser Function Smart Technology

Let’s Discuss 1. Which type of sensor would set off an alert if someone stepped on it? a. A Smoke Sensor. b. A Heat Sensor. c. A Pressure Sensor. 2. With a partner, discuss how a sensor could be used to improve a doorbell for a user with hearing or sight impairment.

Let’s Discuss 1. Which type of sensor would set off an alert if someone stepped on it? c. A Pressure Sensor.

Let’s Build! Utilize a sensor in the system Light Sensor: ‘As a sensor’ RGB LED: Select a color

Challenge 1 Create a doorbell with an audio and visual alert that is activated when someone approaches The On/Off activates the Sound Player which needs a True/False input Filter Select ‘ 0 -15’ Sound Player: ‘Doorbell’

Checks for Understanding 1. Why is a Filter block used in the system? a. It allows a set range of values through. b. It ensures the system stays on. c. It allows any light reading to activate the system. 2. What is a sensor? a. A device which detects or measures an input and makes sure nothing changes. b. A device which changes every few minutes. c. A device which detects or measures an input and records or responds to it.

Checks for Understanding 1. Why is a Filter block used in the system? a. It allows a set range of values through. 2. What is a sensor? c. A device which detects or measures an input and records or responds to it.

Debug It! How can we ensure the Sound Player sounds at a set time interval? Interval: 6 seconds

Challenge 2 Create an improved system: ● Add an image capture feature ● Make it more effective for users with hearing impairments Add 1 virtual RGB LED: Set two different colors Add 2 Intervals: ● set one to 3 seconds ● set one to 5 seconds The Camera will activate at the same interval that has been set for the Sound Player.

Checks for Understanding 1. What is the role of the Interval block in the system? a. It enables the outputs to be activated continuously. b. It enables the output to be activated at set time intervals. c. It enables the output to be activated every minute. 2. What is it that makes this system reflect ‘smart’ technology? a. The system is created on an app. b. The system uses electricity. c. A sensor is used.

Checks for Understanding 1. What is the role of the Interval block in the system? b. It enables the output to be activated at set time intervals. 2. What is it that makes this system reflect ‘smart’ technology? c. A sensor is used.

Chilli Challenges Experiment with the Cycle Colors and Cycle Brightness blocks. Can you create a more effective light alert for your ‘smart doorbell’? Experiment with the Buzzer and Hold blocks. Can you create a more effective sound alert for your ‘smart doorbell’? Experiment with adding a DC Motor block. Can you create a moving element to your ‘smart doorbell’?

Exit Ticket What have you learned today? Can you draw your system?