Automatic water pump

Automatic water pump
While the Water Alarm built a few days ago was still working great, having to remove the accumulated water frequently is still not a pleasurable task. Therefore, I decided to automate the work by automatically pumping the water away form the small container to a bigger bucket. The Water Pump Quickly found a €4 12V mini ...

Connected thermometer

Connected thermometer
Thingspeak is a very interesting site. It collects (and display) a lot of data from different sensors, contributed (of course) by end users. It is interesting to see what it is like to connect a just built thermometer using a Spark Core and a TMP36 temperature sensor to Thingspeak. Currently, it is measuring the temperature ...

Water level alarm

Water level alarm
The water outlet for the air conditioner was broken recently. The water get nowhere to go so we have to collect it in a tin bucket and empty it regularly to avoid overflow.  An egg timer was tried and it is kind of annoying since the time for the water to collect to a certain level was not ...

OLED message board

OLED message board
The low cost, small 3.3cm OLED display is fun to play with. The original one I bought has a built-in ROM for some retarded (Simplified) Chinese characters. The ROM is accessible via SPI and the display itself via I2C. Even though getting the characters from the ROM is doable, there is only a very limited ...