TDA3122 test amp. - diyAudio
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Old 14th September 2012, 11:38 PM   #1
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Default TDA3122 test amp.

Hi all, got some free TPA3122 chips to play with. I've copied my layout for stripboard onto paper and am sorting all bits out that I need.

Now I have a 2 x 12v torroid which I hope to use, as its AC I will need to use a rectifier to connect the amp. I have a rectifier board and parts from a LM4780 audiosector kit. Would this be any good for what I'm planning or will I have to use something else.

Sorry for noob question, but 4780 is only kit I've built. Now I'm hooked and want to learn more.

***EDIT*** See messed up already its TPA3122.. got 4 of em so i can blow 3 in an attempt for a stereo or 2 for bridged

Last edited by littlerick; 14th September 2012 at 11:41 PM.
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Old 15th September 2012, 03:25 PM   #2
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Anybody help? Sat with my soldering iron poised for action for 12 hrs now he he!
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Old 16th September 2012, 09:23 AM   #3
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I have made a rectifier using 8 1n4001 diodes with 100uf smoothing caps. Using a 2 x 12v transformer which is putting out 12.3v on each output. running it through rectifier i'm getting 20.1 v dc output.

hoping to build amp boards during the week, still trying to translate schematic to stripboard and getting stuff into place. Not blown myself up or had a flash of not working, so going good upto now.
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Old 16th September 2012, 12:00 PM   #4
Pafi is offline Pafi  Hungary
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100 uF is too small, I recommend 2200 uF at least.
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Old 16th September 2012, 12:27 PM   #5
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ok will that change my output value or just smooth the ac better?
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