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Author Topic: TDA7294  (Read 1489 times)

Offline aze

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TDA7294
« on: July 25, 2011, 08:51:32 PM »
share ko lng po ung pics...  :)





la pa pong cover...  :D
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TDA7294
« on: July 25, 2011, 08:51:32 PM »

Offline j a y k e z

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Re: TDA7294
« Reply #1 on: July 26, 2011, 08:13:13 AM »
wow +1 sis.

post mo naman ung specs nya sis.
tsaka anu ung nasa bandang likod na circuit.  ;D

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Re: TDA7294
« Reply #1 on: July 26, 2011, 08:13:13 AM »

Offline Woots29

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Re: TDA7294
« Reply #2 on: July 26, 2011, 08:40:32 AM »
+1 din. paano mo napgdikit acrylic?

supply ng fan yun ;D

EDIT:

7812 na lang sana thru dropping resistor para sa fan
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Re: TDA7294
« Reply #2 on: July 26, 2011, 08:40:32 AM »

Offline acer

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Re: TDA7294
« Reply #3 on: July 26, 2011, 08:49:50 AM »
naka center top ba transfo mo
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Re: TDA7294
« Reply #3 on: July 26, 2011, 08:49:50 AM »

Offline Woots29

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Re: TDA7294
« Reply #4 on: July 26, 2011, 08:51:38 AM »
may unused windings sa trafo o
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Re: TDA7294
« Reply #4 on: July 26, 2011, 08:51:38 AM »

Offline makuy

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Re: TDA7294
« Reply #5 on: July 26, 2011, 10:43:33 AM »
sir magkano bili mo sa trafo? tsaka saan?
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Offline amadjo01

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Re: TDA7294
« Reply #6 on: July 26, 2011, 10:52:41 AM »
WOW ang GANDA!!!!!!
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Offline Woots29

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Re: TDA7294
« Reply #7 on: July 26, 2011, 11:07:17 AM »
di ko nakita may angle bar ba un? kaya ang linis ng pagkakadikit ;D
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Offline aze

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Re: TDA7294
« Reply #8 on: July 26, 2011, 01:41:49 PM »
@woots
hahaha angle bar na aluminum sis... hiniram kc ung "ribit" gun ko kaya bolt nlng =)
nilagyan ko ng sariling supply ung fan kc wla na akng mkitang pyesa for 12V supply... ^^ lahat kc ng pyesa nyan eh galing sa sirang amplifier din na nkatambak na, maliban lng sa TDA7294.

@makuy
di ko alam ang price ng trafo sis kc kinahoy ko lng yan eh sa sirang ampli.. pero sa palagay ko mahal yan... my nkita kc ako sa isang shop dito samin na ang output voltage is 25 0 25, 1500 petot...

@acer
ung isang trafo na my unused wires ay nka multi tap at ung isa naman ay single lng... ang pangit kc ng multitap nya kc ang liliit ng out like 3V 6V at 9V wla rin 12V ung main supply nman is 20V pag rectify nman aabot ng 34V...

dalawa ung nilagay kng trafo kc -30V 0 +30V ung input voltage ng TDA7294... combine ko nlng ung dalawang trafo.... ganung circuit dn nman ang use nung sirang amplifier na kinunan ko ng trafo... =) all circuit maliban po sa power supply ng fan is nsa net nman. ^^
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Offline aze

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Re: TDA7294
« Reply #9 on: July 26, 2011, 01:45:57 PM »
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Offline acer

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Re: TDA7294
« Reply #10 on: July 26, 2011, 01:48:13 PM »
Quote from: aze on July 26, 2011, 01:41:49 PM
@woots
hahaha angle bar na aluminum sis... hiniram kc ung "ribit" gun ko kaya bolt nlng =)
nilagyan ko ng sariling supply ung fan kc wla na akng mkitang pyesa for 12V supply... ^^ lahat kc ng pyesa nyan eh galing sa sirang amplifier din na nkatambak na, maliban lng sa TDA7294.

@makuy
di ko alam ang price ng trafo sis kc kinahoy ko lng yan eh sa sirang ampli.. pero sa palagay ko mahal yan... my nkita kc ako sa isang shop dito samin na ang output voltage is 25 0 25, 1500 petot...

@acer
ung isang trafo na my unused wires ay nka multi tap at ung isa naman ay single lng... ang pangit kc ng multitap nya kc ang liliit ng out like 3V 6V at 9V wla rin 12V ung main supply nman is 20V pag rectify nman aabot ng 34V...

dalawa ung nilagay kng trafo kc -30V 0 +30V ung input voltage ng TDA7294... combine ko nlng ung dalawang trafo.... ganung circuit dn nman ang use nung sirang amplifier na kinunan ko ng trafo... =) all circuit maliban po sa power supply ng fan is nsa net nman. ^^

kaya pala ako nalito 2 tranfo 6 caps hehehe
1 points  po
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Offline ™(◣◢)™

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Re: TDA7294
« Reply #11 on: July 27, 2011, 01:33:24 PM »
magkano 7294 ngayun?
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Offline jaguar3275

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Re: TDA7294
« Reply #12 on: July 27, 2011, 03:52:17 PM »
sir aze na try mo na ba ganito sa TDA7294 mo?



anu kaya magiging effect sa ganyan mode.. sana mapag experimentohan to..
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Offline JojoD818

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Re: TDA7294
« Reply #13 on: July 27, 2011, 04:10:38 PM »
ahh that's bootstrapping or more commonly known in the Gainclone world as afterburner... should work but be mindful of stray oscillations or you'll end up with a lot of busted output devices...

I think I have built one of those before...
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Offline JojoD818

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Re: TDA7294
« Reply #14 on: July 27, 2011, 04:17:58 PM »
Quote from: jrsexpress on July 27, 2011, 03:52:17 PM
sir aze na try mo na ba ganito sa TDA7294 mo?



anu kaya magiging effect sa ganyan mode.. sana mapag experimentohan to..



there you are, told you I've done one before... ;D


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Offline j a y k e z

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Re: TDA7294
« Reply #15 on: July 27, 2011, 04:23:09 PM »
wow sir jojo +1 asteeg naman nyan.
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bootstrapping or more commonly known in the Gainclone world as afterburner
may natutunan ako d2 ah  ::)
pwede po pa copy ng pcb hehehe ;D
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Offline aze

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Re: TDA7294
« Reply #16 on: July 27, 2011, 04:38:04 PM »
Quote from: Jayke™ on July 27, 2011, 04:23:09 PM
wow sir jojo +1 asteeg naman nyan.may natutunan ako d2 ah  ::)
pwede po pa copy ng pcb hehehe ;D

ou nga sir jojo pashare.... astig! +point po..
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Offline JojoD818

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Re: TDA7294
« Reply #17 on: July 27, 2011, 05:11:33 PM »
Quote from: Jayke™ on July 27, 2011, 04:23:09 PM
wow sir jojo +1 asteeg naman nyan.may natutunan ako d2 ah  ::)
pwede po pa copy ng pcb hehehe ;D

Quote from: aze on July 27, 2011, 04:38:04 PM
ou nga sir jojo pashare.... astig! +point po..


sorry mga sis but I sold the whole circuit design which also includes the pcb design and I'm legally bound not to make it public. :(

pero ang point dito is IT WORKS! so kaunting buting-ting lang sa Eagle cad and you're all set to go.

Hint: Kahit ano gainclone pwede yan, TDA7293, TDA7294, LM3875, LM3886, LM1875, etc. Just adopt and adjust gain and be careful with pcb design to minimize stray capacitance and oscillations.

Yun isang sikat na subwoofer brand ganyan topology ang gamit sa loob (huwag sana maintindihan ng mga kano itong post ko hehehe) :D



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Offline amadjo01

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Re: TDA7294
« Reply #18 on: July 28, 2011, 10:12:26 AM »
magkano po ba yung IC na yan?
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Offline taqui

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Re: TDA7294
« Reply #19 on: July 28, 2011, 12:42:07 PM »
ang linis ng pagkakagawa. plus sir ts
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Re: TDA7294
« Reply #19 on: July 28, 2011, 12:42:07 PM »
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