Variable Bandpass Audio Filter Circuit


Posted on Jan 4, 2013

This circuit is a variable audio bandpass filter that has a low cutoff variable from about 25 Hz to 700 Hz and a high cutoff variable from 2.5 kHz to over 20 kHz. Rolloff is 12 dB/octave on both high and low ends.


Variable Bandpass Audio Filter Circuit
Click here to download the full size of the above Circuit.

R2-a-b and R6-a-b are ganged potentiometers for setting lower and upper cutoff frequencies, respectively.




Leave Comment

characters left:

in3elx   Jun 2, 2020

What loads does it work for? Small 4 OHM speakers, small 8 OHM spacker (0,5 or 1W), or even 20/40 OHM headphones?

New Circuits

.

 


Popular Circuits

Light timer switch with PIC12F629
Three-phase factor controller
Sound-activated-decoder
Flashing Led Controller
ICL7665S CMOS Micropower Over/Under Voltage Detector
Classic 8051 Memory Layout
Outdoor surveillance with condenser microphones
CD4541 circuit diagram of Ni-Cd battery is automatically charged
Three-start circuit current relay
FS810 integrated power amplifier circuit diagram



Top