If you don’t have at least one twittering appliance in your household, you’re getting behind. The latest addition to the spread is a twittering washing machine. [Ryan] tells us that he kept accidentally forgetting to retrieve his clothing from the washing machine, resulting in smelly mildewy clothes. Now, his washing machine twitters to announce it is done. It also has a sign in the house that displays its status to help him remember. We’ve seen unborn babies and toasters twitter, what’s left? Remember those refrigerators that were supposed to let you know that you’re out of certain food? Why don’t we see a twittering fridge yet?
[Max] sent us his dorm room RFID controlled lock. While RFID door locks are nothing new, his implementation is very slick. The entire unit is attached with suction cups to a mirror on the inside of the door. It looks like it could be removed and put elsewhere in a matter of seconds. That’s pretty slick. Much cleaner than the touch sensitive dorm lock we saw last year.
Microchip’s TC74 is an inexpensive digital temperature sensor with a simple I2C interface. It has a resolution of 1 degree Celsius, and a range of -40 to +125 degrees. This is an easy way to add temperature measurement to a project without an analog to digital converter. We’ll show you how to use the TC74 below.