Circuit Help needed for graphic equalizer using LM3915 - Page 3 - diyAudio
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Old 13th September 2013, 06:30 PM   #21
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Join Date: Sep 2013
These are clickable now. Looks like the main differences are the caps used to split the bands.

Band 1 uses a .047 prior to going in to the LM3900 and another .047 that goes around and meets up on the output.
Band 2 uses a .012 before going in and another to the output.
Band 3 uses a .001 prior to going in and a .0022 that goes to the output.

So I wonder if I change the caps to somewhere around .006 for a new band and 2 .024 on the other if that will give me 2 more near the middle. Then I can use 2 of these kits to provide the 5 different bands I need.


Use the link below to see larger image:

Click the image to open in full size.
http://reactivelights.com/wp-content...9/canakit1.jpg

Click the image to open in full size.
http://reactivelights.com/wp-content...9/canakit2.jpg

Click the image to open in full size.
http://reactivelights.com/wp-content...9/canakit3.jpg

Click the image to open in full size.
http://reactivelights.com/wp-content...3/09/myeq1.jpg

Click the image to open in full size.
http://reactivelights.com/wp-content...3/09/myeq2.jpg
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Old 16th September 2013, 06:09 PM   #22
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Join Date: Sep 2013
Success! Well, so far... I swapped out the caps and it still works!

I will be doing a full scale test of the LED panel that I made later today and will post images. In the meantime, if you want to see the progress, you can check out my website Reactive Lights | Audio Reactive Lighting Systems

Both of my kids are soldering now, so we are having a good time!
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