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1  Using Arduino / Audio / FHT library with electret and lm386 on: May 12, 2013, 09:21:55 am
Hey everyone, I'm a noob when it comes to code and I just want to write something simple using the fht or fft library (from http://wiki.openmusiclabs.com/wiki/ArduinoFHT) to test the circuit. I want to see seven columns of readings in the serial monitor. Or 5 if that is possible. Can anyone assist on where to begin with the code?

Thanks smiley
2  Using Arduino / Audio / Re: MSGEQ7 and electret on: March 09, 2013, 09:17:54 am
Wow that's a cool tool! Once I get it set up that will be very useful since I dont have an oscilloscope and all.

https://www.youtube.com/watch?v=ZHyVWfwPMOs

I used the diagram from this video to wire to mic. I just put the analog output into the input pin on the MSGEQ7. It's supposed to be a preamp but I'm thinking of grabbing a LM386 and trying that instead.

and here's what I did with the chipp: http://www.instructables.com/id/Extreme-Nightlight-Color-Organ/step4/Wiring-Up-the-MSGEQ7-Chip/

thank you!
3  Using Arduino / Audio / MSGEQ7 and electret on: March 09, 2013, 12:22:15 am
Hello all, I am trying to use an electret microphone to feed a signal to the MSGEQ7 chip. I want to eventually have five strips of LEDs respond to five different frequencies of live music on five different pins. I have followed several online tutorials and nothing is just right. I'm thinking that the analog signal from the microphone going into the chip is not strong enough. Or possibly too strong.

Anyone have any insight on how to get these two to work together??
4  Using Arduino / Audio / Re: reading audio with arduino on: February 01, 2013, 02:21:40 pm
awesome tutorial!! so what if I bought a graphic equalizer? could I hook it up to the arduino??
5  Using Arduino / Audio / Re: reading audio with arduino on: February 01, 2013, 10:34:13 am
oh this is cool! there are even some youtubes out there showing me how it works. so is this the only other part I would need? Or do I need a slew of resistors and capacitors to make it work?

Thanks for the reply
6  Using Arduino / Audio / reading audio with arduino on: January 31, 2013, 11:56:38 pm
I have LED strips that I would like to control based off of frequencies picked up from a microphone. Ideally there would be six different sections controlled independently, depending on the frequencies that the microphone picks up. Say one pin would be the lowest tones up to a fifth or sixth pin being the highest tones. The LEDs add up to about 10amps and 12V. I have previously powered them using mosfets on the analog side of my UNO, attached to an appropriate power source of course.

How do I add a microphone into the circuit? Will there be other pieces of hardware necessary? I have used a DIY kit with an electret microphone before and hooked it up to a motor which then responded to sound, but it had nothing to do with an arduino, just basically used the microphone as a switch. I would just use that but I'm not sure how to add it in either and I would like to include the arduino so the lights can fade on/off and blink in different patterns instead of just to the beat.

Thank you!
7  Using Arduino / General Electronics / Re: managing current on: December 21, 2012, 07:03:24 pm
If anyone would be willing to just help me design a little circuit completely I would be so appreciative...
8  Using Arduino / General Electronics / Re: managing current on: December 21, 2012, 07:01:58 pm
Thanks everyone!

So how do I know what mosfet to choose? Like I said I have six strands of LEDs, 3.6 amps down to .12 amps. Would I use the same mosfet for each strand?
9  Using Arduino / General Electronics / Re: managing current on: December 20, 2012, 10:01:04 am
so is this what it will look like? A strand of lights to a resistor to the gate and then the arduino to the source??

I think I'm going to utilize the other 7 pins as well so I guess I will need a heat sink. They will be connected to more strands of LEDs.

 I really appreciate the help! I am just shy of physics 2, therefore a noob.
10  Using Arduino / General Electronics / Re: managing current on: December 19, 2012, 09:22:57 pm
so there would be a MOSFET on each pin I use? or one MOSFET for the whole setup?
11  Using Arduino / General Electronics / managing current on: December 19, 2012, 08:21:48 pm
I am trying to control led strips with my arduino using only the pwm capable pins. The diagram shows how they are wired... three LEDs in series, wired in parallel with other groups of three. The LEDs are bright white 3528 smds, 20mA and 3.4 V. Therefore each strand requires 12V.

My question is how do I go about wiring this together? The 6 pins will have as many groups of three LEDs as follows:

1: 168 (3360mA)
2: 132 (2640 mA)
3: 96 (1920 mA)
4: 60 (1200 mA)
5: 24 (480 mA)
6: 6 (120 mA)
12  Using Arduino / Project Guidance / strobe light timer on: October 27, 2012, 02:49:23 pm
I have a couple strobe lights that I want to set to a timer to give a lightning effect. Is this possible with arduino? I want to be able to just plug the lights in to the timer and not have to take them apart.

Thanks!
13  Using Arduino / General Electronics / Re: powering multiple leds on: September 26, 2012, 10:18:50 pm
Is there another way to set the pin to high voltage?
14  Using Arduino / General Electronics / Re: powering multiple leds on: September 26, 2012, 10:18:07 pm
They are set to output so I'm not sure what's going on.
15  Using Arduino / General Electronics / powering multiple leds on: September 26, 2012, 01:19:11 pm
I am controlling a simple set up, 9 leds, 3.3v and 20mA each, each connected to a 100ohm resistor and plugged into pins 3-13 (skipping a couple) and they are turning on but they are very dim. Is it because they are not receiving enough voltage?
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