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CircuitsRadio, a resource for engineers, hobbyists, inventors & consultants, is a collection of 12,000+ electronic circuits or electronic schematics cross-referenced into 500+ categories to find quick solutions for electronic design problems. Bad links are removed and new circuits or schematics are added frequently.
This site contains lots of FREE electronic circuits (schematics) & do-it-yourself (DIY) circuit diagrams for hobbyists, students, professionals etc. covering a wide range of categories in electronics like audio, music,home/garden related,computer hardware,radio,robotics etc to name a few. There are also links to sites that offer hobby electronic kits and other electronics hobby related stuff. Use the menu on the left to browse different circuit categories.

OVER 10.000 SCHEMATICS & DIAGRAMS (Catalogue of Electronic Circuits)

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Electronic schematics: Filters (Found: 24)

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1.	"A" Weighting Filter For Audio Measurements Source: http://www.sound.au.com/
2.	29.85 MHZ bandpass filter schematic Source: http://www.wa4dsy.net/
3.	29.85 MHZ notch filter schematic Source: http://www.wa4dsy.net/
4.	3KHz low-pass filter plus audio amp (PDF) [ File in a format pdf ] Source: http://www.discovercircuits.com/
5.	Active 2nd Order Filters Source: http://ourworld.compuserve.com/
6.	Active bandpass filters Source: http://www.electronics-tutorials.com/
7.	Bandpass filters Source: http://www.electronics-tutorials.com/
8.	Bandpass filters Source: http://www.qrp.pops.net/
9.	Biquad Active Bandpass Filter Schematic Source: http://www.qsl.net/
10.	Butterworth filters [ File in a format pdf ] Source: http://www.formulations.ab.ca/

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