![]() ![]() To flash the strobe light, you need to turn the Arduino's output pin on and off for specified amounts of time. Breadboard diagram showing how to connect the RGB LED strip with an Arduino and an N-channel MOSFET. All components have a common ground.įigure 1. The RGB LED strip's +12V pin is connected to an external 12V power supply through the switch on the breadboard. The drain is connected to the red, green, and blue pins of an RGB LED strip. The MOSFET's gate is connected to Arduino pin 3 and its source pin is connected to ground. The breadboard contains an N-channel MOSFET and an SPDT slide switch. See the reference from Adafruit in the Bibliography to learn more about the LED strips.ĭiagram showing an Arduino next to a breadboard. If you wanted to control the colors independently, you would need three separate MOSFETs. This means that all the LEDs will turn on at once, generating white light. Note that Figure 1 shows the wires for the red, green, and blue LEDs all connected to the same row on the breadboard. ![]() When the Arduino's output pin goes low, the LED strip will turn off. When the digital output pin from the Arduino goes high, the MOSFET will switch on, allowing current to flow through the LED strip. The LED strip requires more power than your Arduino's pins can provide directly, so you control it with a type of transistor called a MOSFET and an external 12 volt (V) power supply (Figure 1). The video at the beginning of this project demonstrates an analog RGB LED strip, which has separate red, green, and blue LEDs that can be combined to make different colors. There are many different types of LED strips available. Note that you can purchase an Arduino starter kit like the Elegoo UNO Super Starter Kit that will contain many of the parts you need, but you will need to purchase the LED strip separately. This project will guide you through the process of connecting an LED strip to an Arduino and writing a program to control it. This can be trickier than it seems at first. The challenge is that you will need to write your own program to control the frequency and duty cycle of the strobe light. This setup will work better to demonstrate the levitating water illusion, especially if you want to film it. You can build your own much brighter strobe light using an Arduino™ and an LED strip. The disadvantage is that your phone only has a single LED, which is not very bright compared to a strobe light with many LEDs. ![]() The advantage of doing this is that the app lets you easily control the frequency and duty cycle of the strobe. The project has you use a strobe light app on your phone. ![]()
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