LCD Graphic Equalizer

With a Digispark and MSGEQ7 break-out board.

I recently backed a Kickstarter for a Seven Channel Graphic Equalizer Breakout Board for Arduino from a company called cenTex Photonics. I should be receiving it soon. It uses an IC from Mixed Signal Integration (MSI) called the MSGEQ7 . This IC takes an analog signal input and provides an analog output representing the amplitude in each of seven different frequency bands. I thought it would be fun to tinker with.

For this project, I used a Digispark and an I2C LCD Shield Kit, both from Digistump. I also did some looking around on eBay and found another MSGEQ7 breakout board . The cool thing about the one I found on eBay, is that you can solder a 3.5mm audio jack right to the board.

Schematic of circuit:

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Here's a decent video for testing it:

MSGEQ7 Datasheet

Component List:

MSGEQ7 breakout board from cenTex Photonics for $10.00 from https://www.tindie.com/stores/cenTexPhotonics/

MSGEQ7 breakout board from madeatrade for $12.95 on eBay http://www.ebay.com/itm/301210655107

Digispark for $8.95 from http://www.digistump.com

I2C LCD Shield for $17.95 from http://www.digistump.com

I also picked up three stereo audio jacks for $0.99 from http://www.ebay.com/itm/321044251226 . While these audio jacks were very inexpensive, I would probably find another source for them. It took weeks for them to arrive from Asia.