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ricky0066 Posted - Mar 20 2011 : 11:21:22 AM
Hi there

This is what i am trying to get working but not succesfully. Can anyone help please.
We suppose to connect a circuit with use of TL071,2 op-amps (which will be powered by +-15V) to an i-pod or some similar mp3 player with output around 1V. Now the signal is amplified and then divided into bass, middle, treble using low, band and high pass filters to light up LED for each part of the frequency (0 - 100, 100 - 1000, 1000- ... Hz).

5   L A T E S T    R E P L I E S    (Newest First)
audioguru Posted - Apr 30 2011 : 12:21:08 PM
There are many schematic-drawing softwares but I use Microsoft Paint. I Copy and paste parts and pieces of datasheets and other schematics.
Here is the Bass Filter of your circuit:

Download Attachment: bass filter.PNG
7.76 KB

kbyrne Posted - Apr 30 2011 : 11:26:12 AM
How does somebody new to this type of forum get the ability to put schematics on a computer and then post it. What type devise or windows based program do i need to buy or down load and any thing else thatis needed.
audioguru Posted - Mar 20 2011 : 6:28:14 PM
I also chat on this website.
Your schematic and breadboard here show the trimpots P2 and p3 that were removed on the other websites.
ricky0066 Posted - Mar 20 2011 : 11:25:00 AM
http://media.share.ovi.com/m1/s/2847/1b5a7e117a4a4594a7f0e344fa3111b4.jpg
http://media.share.ovi.com/m1/s/2847/800d98adbc7c4fcd9c6e8cd740c066a2.jpg
ricky0066 Posted - Mar 20 2011 : 11:23:13 AM
the circuit

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