First of all thanks for the attention & help I might get here.
I wanted to make some sound reactive LED strips. Im learning a bit of Arduino programming and i would like to do this project in Arduino.
The second thing I already ordered is a microphone sensor.
Also i got the Kumani Starter Kit:
Which additional hardware do I need?
Could you please help me select a power supply? Oh, and how can I connect the LEDs to the power supply? I saw some shields and I also saw that my Kumani Kit has a sort of shield but I dont know how to connect to the 12V.
Thanks for reading and for your help, hope u have a nice day /night
zX
[u]Adafruit[/u] is probably the best place to start learning about "NeoPixels" (WS2811)… How to wire them up & power them, and drive them etc. They are pretty simple... The software & timing is a bit tricky but they have a library that does most of the software "work".
You have to add a resistor and supply power, and that's about if for wiring (on the output-LED side).
As far as the power supply goes, usually power supplies are rated for voltage and current, rather than wattage. But, Watts = Volts x Amps so it's easy to calculate. With a "normal" power supply the voltage is fixed and the current supplied is determined by the load. So, a 12V power supply rated for more current is OK, and in fact you usually want a little extra "safety margin" so you're not running the power supply at it's maximum. And, I think you're supposed to allow for 20mA per-LED per-color (60mA per LED) but you can check that/
But, in this case you'll probably rarely be running all LEDs on all-colors all the time so you shouldn't be stressing the power supply.
The second thing I already ordered is a microphone sensor.
What sound sensor? There are 3 "kinds" of sound sensors. Or, it's common to connect the Arduino to a line-level (or headphone level) audio signal so you're not picking-up sounds from the room.
I only speak & read English but I don't see the actual specs.
I see A0 (analog) and D0 (digital) pins. The digital pin is probably a "threshold" output that goes high when the sound is above the threshold (depending on the pot setting).
The analog output could be a biased audio signal or a varying DC level relative to signal level. If it's a biased audio signal the Arduino ADC should read about 512 (half of the 10-bit 1023 range) with silence. If it's varying DC it should read about zero with silence.
If it's biased audio you'll typically want to subtract-out the bias in software. Then, you'll typically want to find the peaks or you can do FFT if you want frequency information.
If if's varying DC, you don't get any frequency information.
connecting it to PC via AUX sounds great actually
You do need to bias the input because the Arduino can be damaged by the negative half of the AC audio waveform and/or the signal can be "damaged" (distorted). It requires 2 equal-value resistors and a capacitor. There's a little schematic at the bottom of [u]this post[/u] (and also a little code to get you started).
