Introduction: Tempy -A Cute Temperature Controlled Smiley

By github


Note- I welcome any suggestions or improvements, either for this instructable or for the project itself.


Now, let's introduce your new friend: Tempy.


Tempy is a cute little LED-based smiley with an ATTiny 45 at its heart, developed using the Arduino IDE within the core files. The expression of Tempy changes based on the temperature it senses.


When the temperature is within a comfortable range for humans (20-25.4 degrees Celsius), Tempy will appear happy. When it gets slightly hot (25.5-28 degrees Celsius), Tempy's expression will change to "meh" (represented by " : / "). As the temperature drops below 20 degrees Celsius, Tempy will shiver. And when it gets too hot (above 30 degrees Celsius), Tempy will sweat and appear sad.


Let's begin this project by discussing what needs to be done and proceed to the bill of materials.


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Now, let's dive into the project details and explore the necessary materials.

Step 1: Bill of Materials

1. 7 LED's In total , 2 for Eyes (choosen blue), And 4 for smile (choosen green) and 1 for sweat drop (choosen white) 0.4$

2. 2 sheets of photopaper (For light filters).0.1 $

3. wires

4. ATTINY 45 2$

5 AVRISP/USBASP

6 A charging Connector 0.3$

7 . A Circular Plastic Body. Recycled or 3D Printed(Stl will be shortly uploaded to thingiverse)

8 . A transparent circular plastic plate (i've used from a sewing needle packaging..).

9. 10K Thermistor 0.12$

10. ls7805 , 5V Voltage Regulator 0.2$

11. 1 a4 Size printer sheet.

Step 2: Light Filter for Tempy

To create the light filter for your project, follow these steps:


1. Cut four circular discs from photopaper, making sure they are the same size as the transparent shield cover.


2. Use the pictures provided as a guide to create holes for the eyes, smile, and sweat drop on the circular discs.


3. The purpose of these holes is to highlight the differences between the smile and meh expressions.


4. Glue all four photopaper discs together, ensuring they are aligned properly.


5. Cut a circle from a printer sheet that matches the size of the filters. This circle should not have any holes.


6. Using a glue gun, carefully attach the printer sheet circle onto the thick filter.


7. Once the glue has dried, fix the bottom of the filter to the shield. Ensure it is securely attached.


Following these steps will allow you to create the light filter for your project.

Step 3: Setting Up the Leds and the Circuit.

Assemble the circuit as In the pictures Or from the Github Repository (Which has a board and schematics files.and the arduino's Sketch)

Step 4: The Arduino SKetch and Board Files

Download From Github .

Step 5: Enjoy

Power Up the module Using A MiniUSB or any sort of 5V Power source . and you're done

Step 6: Updates

Updates will Appear here. soon. report Bugs in comments.