Difference between revisions of "ElectroBlocks/C2/Temperature-Indicator/English"

Title Slide

Learning Objectives

• Build a set of blocks for Temperature Indicator
• Check the output of the experiment using the simulator

System requirement

• Ubuntu Linux OS version 22.04
• Google Chrome browser
• A working internet connection to use Electroblocks

https://electroblocks.org/

Required Sections

• Logic
• Thermister
• LED
• Math

Here, when the temperature value is greater than the defined value the LED is turned ON.

Otherwise the LED is turned OFF.

Let us build this circuit using ElectroBlocks.

Click on the Logic section

Point to if-then-else block

Drag the if then else block and place it inside the loop block.

Click on the Logic option available on the left hand side of the screen.

The third block represents the Comparison block.

Select and place this block in the if section of the if then else block.

Click on the Sensors section

Click on the Sensors section and Click on the Thermistor.

Select the Thermistor Setup block and drag it in the working area.

By default, this button will be connected to analog pin A0 of Arduino.

Click on the number box and change the value to 25.

Note that, in the simulation window, the temperature changes to 25 °C as well.

Check the Copy All checkbox.

This setting will set the temperature of the thermistor to 25 degrees for all the 3 loops.

Click on the Thermistor option.

Place this block in the 1st section of the comparison block.

Click on the Thermistor.

Select the Read temperature block and drag it in the working area.

Now place this block in the first section of the Comparison block.

Let us set the condition for the temperature reading for the thermistor.

select the condition to greater than equal to

Select the condition to greater than equal to as shown.

Select the number block.

Select the number block and place this block in the 2nd section of the Comparison block.

Click on the number block and change the number to 20.

Select and drag the Turn on LED.

Select the Turn a LED ON block and place this block in the then section of the If then else block.

The LED is connected to pin 2 of the Arduino.

Select the wait for 0.2 second block

Drag it in the working area.

Place this block below Turn a LED ON

Change the time to 1 second

Point to if then block

Select the wait for 0.2 second block and place this block below the Turn a LED ON block.

Change the time in the wait block to 2 seconds.

We have set the blocks for LED to turn ON for 2 seconds if the temperature value is above 20 °C

Right click on the Turn on LED block and select the Duplicate option.

Drag and place this new block inside the else section of If then else block.

Click on the dropdown arrow and select OFF

Drag and place this block inside the else section of If then else block.

To change the state of the LED, click on the dropdown arrow and select OFF.

Now we have completed the block setup for this experiment.

Highlight the code on right side

The code includes self-explanatory comments for better understanding.

In the thermistor setup block, change the temperature value to 15 ^oC.

play the simulation button to see the output.

This is because the thermistor temperature is 25°C which is greater than the comparison block .

We will create a situation, where the thermistor reading is below 20^oC.

In the thermistor setup block, change the temperature value to 15 ^oC.

Now, play the simulation again to see the output.

Notice, the LED remains OFF.

Summary

In this tutorial, we learnt how to:

• Build a set of blocks for Temperature Indicator
• Check the output of experiment using the simulator

Assignment:

1. Connect a LED to pin 5
2. Turn ON the LED when the temperature is below 25°C

Thank you