Unit 9.1_Lesson 4_CD Resource 4a_Sensors and flowcharts Sensors and Flowcharts.

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Unit 9.1_Lesson 4_CD Resource 4a_Sensors and flowcharts Sensors and Flowcharts

Unit 9.1_Lesson 4_CD Resource 4a_Sensors and flowcharts Flowchart symbols Process Start / Stop Input / Output Decision Process Subroutine

Unit 9.1_Lesson 4_CD Resource 4a_Sensors and flowcharts Security light Identify what instructions would need to go in the flowchart boxes to operate the security light.

Unit 9.1_Lesson 4_CD Resource 4a_Sensors and flowcharts Sensor asks: Is movement detected? Sensor asks: Is movement detected? Start Turn on light Turn on light Turn off light Turn off light YES NO Construct a flowchart to operate the security light. Security light

Unit 9.1_Lesson 4_CD Resource 4a_Sensors and flowcharts YES NO Sensor asks: Is movement detected? Sensor asks: Is movement detected? Turn on light Turn on light Start Turn off light Turn off light Can you add a delay? Where would you put it? Security light

Unit 9.1_Lesson 4_CD Resource 4a_Sensors and flowcharts YES NO Sensor asks: Is movement detected? Sensor asks: Is movement detected? Turn on light Turn on light Start Turn off light Turn off light Delay 10 seconds Security light with delay

Unit 9.1_Lesson 4_CD Resource 4a_Sensors and flowcharts Sensor asks: Is anyone there? Open door Delay 10 Close door Start Yes No Automatic door

Unit 9.1_Lesson 4_CD Resource 4a_Sensors and flowcharts Automatic door – solution 1 No Yes Close door Sensor asks: Is anyone there? Open door Delay 10 Start What is the problem with this solution? How could you change it?

Unit 9.1_Lesson 4_CD Resource 4a_Sensors and flowcharts Automatic door – solution 2 (safe version) No Yes Sensor asks: Is anyone there? Open door Start Delay 10 Close door