Hi
I'm developing a project for my school, and I have to get a good grade xD
With Arduino + LedStrip + HC-06 + SoundSensor.
Through an application I will control the colors of LEDSTRIP
But, I have some problems regarding which resistors to use...
I'm powering my arduino with a 9V battery. My Ledstrip consumes 9W, has 30 leds and each led consumes 40mA, works at 5V.
HC-06 (bluetooth) works at 3.3V to 6V. And my soundsensor at 3.3V
Now, which resistance should I use?
Thanks in advance
Hello
run some tutorials and learn how the hardware works.
These results you can de easly used this for your project.
For an electronics class? Do you have any electronics or programming experience? How much time do you have? Just to get you started, here is a little example project I posted a couple of years ago. It should work with your sound sensor but with a 3.3V sensor the bias will be lower so you'll have to change the software value. Or, you can use the bias circuit and connect it to the headphone-output on your computer or phone.
What's the bluetooth for? It makes your project a LOT more complicated.
To reduce the voltage? A resistor won't work. You need two voltage regulators. The voltage regulator for the LEDs should probably be a switching/switchmode type because a regular linear regulator might overheat. For the 3.3V you can probably get-by with a linear regulator.
There are different kinds of LED strips. I assume this is an addressable RGB LED strip? Addressable LEDs don't need a driver circuit but they require a software library so the software is more complicated.
A battery like this? It may not be able to supply the current, and if it can it won't last long. A 5V plug-in power supply would make things easier, and you'd only need a 3.3V regulator. Or, if you skip the bluetooth you can probably power the sound sensor with the Arduino's "little" built-in 3.3V regulator. BTW - There are sound sensors that run on 5V.
Bluetooth to switch color leds, and soundsensor to use the ledstrip reactive to music.
Led strip it an "SK6812" 5V 18W 40mA per led
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