High-Power Control: Arduino + TIP120 Transistor

Up until now, we have talked about working with a lot of low-power devices. [[Sensors]], [[LED]]s, [[IC]]s, and the like are all capable of being powered directly from your Arduino, but as many awesome 5 and 3.3v [[components]] as there are, eventually you will find yourself holding a 12v [[solenoid]], [[motor]], or light and wondering… Continue reading High-Power Control: Arduino + TIP120 Transistor

Tap, Tap, Drop. ADXL345 Accelerometer + Arduino

You know [[accelerometers]] right? Yeah… the things that tell your phone how it is orientated. But, believe it or not accelerometers are best suited for something other than sensing orientation. Excuse my oversimplification here, but this is going to help those who don’t know what’s going on. [[Accelerometers]] for all intents and purposes sense movement,… Continue reading Tap, Tap, Drop. ADXL345 Accelerometer + Arduino

Are we getting close? Proximity Sensors + Arduino

In past tutorials, we have covered temperature, color, time, direction, but never distance or proximity. I think I strayed away from this because most of the lower cost proximity sensors are pretty drop-dead-simple to use and thought it might not be that useful. But the time has come, I’m writing about some distance/proximity sensors. While… Continue reading Are we getting close? Proximity Sensors + Arduino