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Step 7Controlling the LEDs
To control the LEDs we will need a transistor. Since we want to be able to change colors we will need to control each color (pin) of the LEDs meaning 3 total transistors. For this job TIP 120 transistors should work fine. Wire them up according to the sketch below. wire them to the same breadboard already attached to the foam board with the sensors.
Make sure to connect the collector pins of the transistors to PWM pins on the arduino as we want to change the intensity of the lights and can only do so with pulse width modulation.
Make sure to connect the collector pins of the transistors to PWM pins on the arduino as we want to change the intensity of the lights and can only do so with pulse width modulation.
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