Instructables

Arduino Automatic Temperature& Humidity Controller for Pets

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Picture of Arduino Automatic Temperature& Humidity Controller for Pets
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    Jack and Jose, a pair of beautiful hamster, has accompanied me over 100 days and nights. Their soft white fur makes me quiet and warm, especially when I coding in the winner.

    But the very tragic things happened in the last week. As the cold air from Siberia, Shenzhen has suffered low temperature and humidity for than 10 days. The temperature is about 10 degree, makes me fell chilling every day. The very bad thing happened: Jack and Jose, leaved me away……

    It was such a sad afternoon. After I buried them, I had a new idea on my way home: I need to create a house, a house with floor heating, air conditioning, for my further new friends.
 
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Step 1: Module Preparing

Picture of Module Preparing

    As a software engineer, I am not good at hardware, So i decided to use the most easy-to-use platform: Arduino

    After browsing on the web, I got the following modules:

1. Crwoduino: an Arduino compatible platform, with some upgrading features to make it easy to use.

2. Temperature & Humidity Sensor and a 4.7K Resistor. I need this sensor to report the controller the current temperature and humidity.

3. LCD Keypad Shield. With this LCD I can monitor the current temperature and humidity, thus to make this project practical in my daily life.

4. 2-Channel Relay Module. As the Ultrasonic Nebulizer uses power more than 5V, so a relay module was used to control the Ultrasonic Nebulizer on/off.

5.A  Ultrasonic Nebulizer to increase the air humidity.

6. Screw Shield , this shield helps me connecting the wires easier.

7. Thermal Tablet: this thermal tablet acts as heater for the pet house.

8. Some Wires or Wires would be needed

    Basically, the temperature& humidity sensor reports to the Crowduino how cold it is now. If the Crowduino “think” it is too cold, then it will open the thermal tablet to warm the hamster or the ultrasonic nebulizer to begin the air humidification.

dreamreaper7 months ago
i want do decrease the humidity, what should i do?
Build_it_Bob8 months ago

Jack and Jose will be honored by the steps you took to prevent the mishap from repeating itself . Will the wiring and electronics be separated from the enclosure ? The reason I ask is your new friends may chew on any exposed parts which could be tragic. Under a glass sheet or cutting board comes to mind , but I am sure there are better options to keep things safe .

Very nice project , thank you for sharing !

Build_it_Bob

You could take and thermal glue the thermal pad to the underside of the glass aquarium. It would be messy, but it would flawlessly transfer the heat from the pad into the glass, generating the same effect, but with absolutely no parts inside of the enclosure. also, you could have the humidifier in a corner of the enclosure, and have a fine wire mesh, with gaps no bigger than 1 mm, and seal that corner of the enclosure, forming (looking down from the top) a triangle out of that corner. I feel that this would provide adequate protection.

boocat8 months ago

I am so sorry you lost your beautiful hamsters. I lost mine last year and it still hurts. They are very dear little creatures. Thank you for this great tutorial.

sabeena8 months ago

So sorry. I feel the same about my little citters (Gerbils). We had a very bad snow storm this winter and the power lines came down and the mayor told us to expect no power for a few days. We drove our critters to a friend with power when the house became too cold for them (14 Cel). ALSO at night we drop the temperature to 18 Cel and that may be too cold for our gerbils, so we have a "foot" heater to keep them warm. It radiates consistant heat. This photo shows them sleeping in the food dish because it is warmer by the heater.

critters.jpg
kipluck8 months ago

My condolences on your loss of Jack and Jose. I applaud you by turning your grief into ingenuity and elbow grease, though! Would this heat enough as an undertank heater? I ask because I find anytime wires are accessible, a hamster/gerbil/what-have-you WILL eat the wires.

Hey, nice idea. I'm just missing the powerOff trigger teperature and humidity. Dont let your little friends overheat and get a too moist enviroment.
amulder18 months ago
thermal tablets are usually used on the outside of the cage. When using a glas or plastic cage this works great. If you have a insulating cage I would suggest making a false glas bottom to go over the thermal tablet. Makes it easier to clean too!
bob30308 months ago
I'm sorry for your loss. But, it is heartwarming to know that out of this tragedy you were able to develop a system that can be used to protect future furry friends. Thank you for sharing and thank you for all the little ones lives you have saved by sharing.
KB9VZH8 months ago

How do you prevent them from eating the wires or heater pad? My daughter has a hampster and it will try to eat anything that is not food.

Jobar0078 months ago

Is your thermal tablet waterproof? I would hate to see some fried hamsters due to the electrical conductivity of urine.

This is a good idea. I've been working on doing the same thing but with a smaller form factor (and cheaper) arduino so I can leave it in the installation.

The tablet won't fry the hamsters, it just runs 12V, but I wouldn't
place it at the bottom, I had hamsters and they started to smell bad
after a week or so, heating the padding would keep the hamsters warm but
will also spread the urine odor.

P.D: I've noticed the hamster cage is made out of plastic, make sure they have a good ventilation too.