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gev 30th November 2012 06:50 AM

TDA7294 all in one
7 Attachment(s)
TDA7294, vumeter, tone control and DC rectification filter all in one single PCB (pcb program proteus ares)

test video; TDA7294 Komple 100W Amplifikatör Vu Metre Ton Kontrol - YouTube

PCB desing: Ahmet YERLİ

littlerick 30th November 2012 09:48 AM

Nice.... but, how would you mount it in a enclosure. The VU would be inside or the controls will be on bottom?

geraldfryjr 30th November 2012 12:00 PM

Replace the LED's with one of these,

10 segment led bargraph - Google Search

and use a small length of ribbon cable or some 30Ga.WireWrap hook up wire to make an umbilical cord type of cable cable to the display.
Use standard 20pin IC socket to solder to, so that you don't risk over heating the display while you are soldering the connections.
Add then just plug the display in to the socket or you can make a little board to mount the socket on and mount it to the chassis via mounting holes in the display board.

jer :)

gev 30th November 2012 12:49 PM

1 Attachment(s)
thanks @geraldfryjr

alternative pc ide hdd, floppy cable or to mount horizontally leds

geraldfryjr 30th November 2012 02:26 PM


That Works !!


jer :)

dudaindc 30th November 2012 04:52 PM


Originally Posted by gev (
thanks @geraldfryjr

alternative pc ide hdd, floppy cable or to mount horizontally leds

I love that idea - brilliant! :up:

danielwritesbac 1st December 2012 04:13 PM

You can reduce the built in bass blocker by changing the NFB cap from 22u to 220u and changing the bootstrap cap from 22u to 47u. If this doesn't make super low notes clear, change the 680R feedback-shunt and the 22k feedback resistor to higher values like 1.8k, 47k or even higher. If the amplifier is non-inverting, you won't have to change any other parts to do this. See the datasheet notes section for more information about bass.
With the bass blockers removed, now turning up the bass will do more than just boom--you'll have some thunder too.

gev 6th December 2012 12:27 PM

thanks @danielwritesbac

JMFahey 7th December 2012 12:23 AM

Congratulations on your excellent design ;)

auto pilot 22nd December 2012 04:13 PM

thank you for what is given ......!!!!!
yesterday I've tried to figure this pcb but there are constraints
1. utility power and make noise on my tranformer
2. on the two resistors 2k2 5w, two 12v zener that what it means?
3. A number used kiprok
I apologize for Indonesian people who can not speak english

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