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View Poll Results: Was a good idea to use two lm1875 or a big stk chip
Use stk 8 27.59%
use lm1875 21 72.41%
Voters: 29. You may not vote on this poll

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Old 5th January 2013, 08:56 AM   #11
PetruV is offline PetruV  Romania
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I think the chip is dead it makes a very loud thinking noise even when its not hooked up to my computer,when i conect it to my computer the noise still continues and distorts the music
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Old 5th January 2013, 09:10 AM   #12
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I wouldn't use those ceramic capacitors . They are good for suppressing HF noise on the supply line, and they do the same duty well for reducing bandwidth at input (LP filter) of amplifier .
Use plastic dielectric ones...polyester, styrene, ecc for a Vl of 63-100 V.
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Old 5th January 2013, 09:43 AM   #13
PetruV is offline PetruV  Romania
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Quote:
Originally Posted by picowallspeaker View Post
I wouldn't use those ceramic capacitors . They are good for suppressing HF noise on the supply line, and they do the same duty well for reducing bandwidth at input (LP filter) of amplifier .
Use plastic dielectric ones...polyester, styrene, ecc for a Vl of 63-100 V.
Oh thats why it sounded not bassy when it worked!
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Old 5th January 2013, 07:25 PM   #14
PetruV is offline PetruV  Romania
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Can someone post a good schematic here,with not a lot of components and mostly with the components that are on the schematic just swaped around
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Old 5th January 2013, 09:58 PM   #15
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http://www.ti.com/lit/ds/symlink/lm1875.pdf
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Old 6th January 2013, 08:16 AM   #16
PetruV is offline PetruV  Romania
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I think il use danielwritesbac veroboard version,but my soldering iron burned up since i worked too much with it since i was desperate to her the amp,in coupe minutes il go to the shop with my dad and i will return most probably succesfull in one hour
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Old 6th January 2013, 10:34 AM   #17
PetruV is offline PetruV  Romania
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got a new soldering iron and its so good wow,much better than my old one
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Old 6th January 2013, 11:08 AM   #18
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You can raise the value of the input capacitor .
That will increase bass . 1 till 3 uF are ok
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Old 6th January 2013, 01:05 PM   #19
PetruV is offline PetruV  Romania
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DSCF2873.jpg
This is the schematic im building now,i got a new soldering iron and its so awesome!1!!1
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Old 6th January 2013, 02:38 PM   #20
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This one is now symmetrical supply.
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