jetlib.sec » Tags » ir-emitter

You know you’ve got a good hardware platform if you can easily repurpose it with a code rewrite. And that’s what [Eric] continues to do with these little Hexbugs. This time around he’s bent the IR emitter and receiver downward to use as a reflectance sensor. This gives it the ability to follow a dark [...]

Tags:  code Hardware hexbug eric line-follower ir-emitter hardware-platform toy hacks  

Ever wonder how to calculate revolutions per minute using a microcontroller? This project shows you how by purposing an IR emitter and detector and a computer fan. As the fan blades spin they disrupt the beam of infrared light between the emitter and the receiver. This results in a waveform on the receiver’s circuit which [...]

Tags:  fan emitter receiver revolutions-per-minute ir-emitter computer-fan microcontrollers