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Sainsmart uno starter kit thermometer PDF Afdrukken E-mailadres
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LaagsteHoogste 

This is a Sainsmart uno showing the temperature on a 4 digit 7 segment common cathode display.

The temperature sensor is LM35. All these parts are from the Sainsmart uno Starter kit.

 

I built this using this tutorial on randomnerdtutorials.com

At first it didn't work because he uses a common anode display so i had to change the code. I also changed the code to work with the LM35 sensor. I smoothed out the display by only reading the temp every xxx display updates. I could not get the decimal point to work so i messed some more with the code and added a c symbol. I am not a programmer so i guess it is a bit messy and not very optimal but it works.

After all the modifications i made this fritzing schematic, i hope it is easy to copy for the beginners like me.

On the left of the breadboard i show you the positions of the resistors and the wires on the display. Don't build this on your breadboard.

Get the code from pastebin here
Original code by Rui Santos, http://randomnerdtutorials.com