Teensy 3.6 connecting a 3.5mm Jack

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Wumbo

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Hi,

I am trying to connect a 3.5mm jack to my teensy 3.6. I would like to read the audio levels coming in and then analyze them to control leds. I am stuck on connecting the jack to my teensy. It is a 3 prong jack with red-hot, blue-cold, and black-ground.



IMG_0515.jpg

Any advice or help would be great. If i am not able to analyze the signals would a spectrum shield be a good idea, https://www.sparkfun.com/products/13116. I would have to figure out how to connect that to a tennsy 3.6 as well.

Thanks
 
It isn't clear to me what you consider to be "a good idea", as I don't clearly know what this project is connected to. Simply connecting your 3.5 mm jack to an analog input is too simplistic, and not "a good idea" to me. The audio signal must be within 0v and 3.3V, a unipolar signal. Your source may be a bipolar signal and could well exceed the ADC voltage limits, but would also need to be offset so that the peak to peak signal is between 0V and 3.3V. Hence an interface, like the audio shield would be a better idea to start with. https://www.pjrc.com/store/teensy3_audio.html

How do you plan to control your LEDs?
 
It isn't clear to me what you consider to be "a good idea", as I don't clearly know what this project is connected to. Simply connecting your 3.5 mm jack to an analog input is too simplistic, and not "a good idea" to me. The audio signal must be within 0v and 3.3V, a unipolar signal. Your source may be a bipolar signal and could well exceed the ADC voltage limits, but would also need to be offset so that the peak to peak signal is between 0V and 3.3V. Hence an interface, like the audio shield would be a better idea to start with. https://www.pjrc.com/store/teensy3_audio.html

How do you plan to control your LEDs?

Currently i am controlling my leds with the neopixel library and my teensy 3.6. I ordered the shield for the teensy. Are there any boards compatible with the teensy with a MSGEQ7 graphic equalizer display filter? Or will i have to make my own. I would like to use this so i can split the signal into the 7 bands and then create different effects for each frequency range. So far no issues driving the leds or powering them.

Thanks
 
I could only find this which is for an Arduino, but you may be able to use your Teensy 3.6 board too. I don't have the changes you would need to make.
 
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