Arduino Projects > Arduino LCD/Temperature/Humidity Display

 Arduino Uno R3

The Arduino Uno R3 - I added some red electrical tape to keep from shorting against the USB connector.

Working Project

Here is the working project.

March 26, 2012: If you read about my previous project, you would have seen how easy it was to output something to a LCD. I had picked up a DHT11 temperature and humidity sensor off of eBay. They are inexpensive and easy to fine. Well, no time at all and I had it outputting to the serial console... Thanks to! They have the data sheet and libraries need for this arduino project. Go and check them out!

I had very little trouble hooking up the DHT11 to the Arduino. The fun bits happened when I was making my own PCB. I used my Toner Transfer method. It had been so long that I had to remember how to do it all over again. The main thing to remember is to scuff up the board enough to get the toner to adhere to it.

As always, here is the Arduino sketch that I used (get it here Note: I was just apprised that this wasn't the current code. I have fixed it! Sorry for the confusion.) The DipTrace board files can be found here( I converted an Eagle board file to DipTrace and then made my board. I think it worked out rather well. I was thinking I could put this inside a computer and or anything that I needed to track humidity and temperature. It could be modified further with alarms for temperature or humidity very easily. I was just really impressed with how easy it all came together.

If you have any questions about this project, email me.

Breadboarded project

Here is the breadboarded project. Not very sturdy or pretty (see next pic...).

Closeup of the mess

Here is a close up of the mess...

DHT11 Sensor

DHT11 Digital Temperature and Humidity Sensor

DHT11 Sensor Wired

The DHT11 wired to hook up.

LCD Display

LCD Displaying the data

LCD Display wired

LCD display wired up. Pin 1 has the red stripe.

Backside of the Shield

Back side of the shield. You can see some of the magazine paper imprint into the copper.

Top of Shield

Top view of the shield.


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