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In this instructable we will be building a simple circuit that will allow us to control a solenoid using the popular physical computing platform ardui...
• Arduino board • USB cable for programming and powering the Arduino • Breadboard • Some jumper cables • A 1K resistor • TIP120 transistor (TIP102 wi...
USB powers the arduino, the batteries power the solenoid. A jumper grounds the two together.
When the transistors labeled side is facing up the legs (from left to right) are B, C, E: Base, Collector, Emitter. We will connect the output pin o...
The "ground" leg of the solenoid is connected to the collector leg of the transistor. The "power" goes to the high voltage power channel (from our ba...
Now just program the Arduino to drive the appropriate output pins and enjoy. I've connected the transistor to pin 13 so I can see the built-in LED wo...
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