Me too! I have a blog that is just for Arduino projects. You can see it here.
I can never seem to remember the registry settings for this so here it is for review. This works for Windows XP thru 7 to the best of my knowledge.
On my last project– which still isn’t done yet- the buttons for changing the temp display are very unresponsive.
The reason of course is because the Arduino has to loop through all the main code before getting around to checking the button status.
I found the cure! Interrupts!
It occurred to me that the tri-temp project doesn’t have to be limited to the DHT22 sensor. Duh!
What is attached to the three externally accessible ports is totally up to software. I think maybe I’ll add a pressure sensor too.
This kit is the best! I love using the 16×2 LCD screens in projects but they take up way to many digital io ports. The LCD117 fixes this and makes the LCD serial. Using ONE digital pin. Yeah!
The kit comes from moderndevice.com and comes preassembled or as a kit. Get the kit- it’s way more fun to build it. Pictures below.
This is the first version of the Tri-Temp code. If you find any errors or add any features let me know so I can update it. Continue reading “Tri-Temp Standard Code v1.0”
This is the Tri-Temp project. It comes in two flavors- Standard and Ethernet. The Standard version outputs all readings on an LCD. The Ethernet adds output to HTML via a web browser. I did not design this to use an Ethernet shield- only the Arduino Ethernet- it’s more compact.So what’s this all about? Reading the Temp and Humidity! Nothing special going on here, just reading the digital data from three DHT22 sensors and displaying it.
You’ve seen them. Those really nice graphic depictions of arduino boards and their wiring schematics. They’re all over arduino.cc and their examples.
I’ve looked for them. I thought they could be Visio templates or something.
Well I finally found them!! They come from a software program called Fritzing. It’s an electronic design automation program. Check it out!
It’s free too! Now I can make pretty schematics!! Thanks to fritzing.org!!
I’ll post a review soon.
Coming soon- the mostly completed Tri-Temp box. Two editions- Standard and Ethernet. I’m still finishing it up and have lots of pictures.
- Measure temperature and humidity from three locations via digital probes
- Self contained in a small project box
- Standard uses Arduino UNO
- Ethernet uses Arduino Ethernet
- Uses 16×2 LCD to display on Standard version
- Ethernet uses LCD plus web interface!
- LCD interfaces with Arduino via serial- no hogging all the digital lines!
- It has its own logo!
- Internal temp monitoring….just because
- 3 wire External digital probes are pluggable and cheap!
- Runs on 9v battery (don’t know how long yet….)
- 4 interface buttons on project box to control the display
I should have it wrapped up and posted soon. The code will no doubt be a constant work in progress but the hardware is almost complete.
This is a Panasonic SPST Normally open latching single coil relay. P/N 255-2375-ND
My original purpose for this relay is to switch 12V DC.