Line Sensing. QRE1113 Reflectance Sensor + Arduino

The QRE1113 is a common reflectance sensor often used in robotic line followers. The sensor works by shining an [[IR]] [[LED]] down and seeing how much of that light bounces back using a [[phototransistor]]. Because dark colors will bounce back less of the light, the sensor can be used to tell the difference between white… Continue reading Line Sensing. QRE1113 Reflectance Sensor + Arduino

A Slow Display… E-Paper + Arduino

Most notable for its inclusion in the Kindel and other E-Readers, E-Paper has recently become very popular. But until very recently been out of reach to being used in personal projects. Luckily for us, SparkFun started selling and E-Paper display, and breakout board finally bringing this great technology to a place where we can slap… Continue reading A Slow Display… E-Paper + Arduino

Sensing Barometric Pressure | BMP085 + Arduino

Light, location, temperature… What’s next? Well, how about Barometric pressure? You know.. that thing that determines so much of our weather. Well the BMP085 Barometric Pressure sensor, available at SparkFun is a great little sensor capable of sensing such small changes in barometric pressure it can be used as a pretty precise altimeter as well.… Continue reading Sensing Barometric Pressure | BMP085 + Arduino