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It is currently 17 Oct 2017, 19:13

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PostPosted: 09 Oct 2017, 09:34 
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Joined: 20 Sep 2017, 08:08
Posts: 1
Made myself a networkplayer with this nice little amp:

Attachment:
P_20171008_143220s.jpg


Here is the amp-part:

Attachment:
P_20170920_201923s.jpg


It's battery powered and sounds really nice! The digital part consists of a raspberry pi and hifiberry plus, for those who might be interested.

It was a fun to build and I am really happy you shared it. Thank you!


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PostPosted: 12 Oct 2017, 07:00 
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Joined: 19 Feb 2013, 05:16
Posts: 1
Just build this nice amp to a protoboard for testing but for some reason the other mosfet and R4 are warming quite a lot and the original 0.6W R4 was smoking. So I swapped 8.2ohm 5W in place for R4 and measured 520 mA through it. The other channel's R4 draws only 137 mA which i think is normal. Any tips for troubleshooting? I haven't noticed any mistakes in wiring and it's pretty much identical to the other channel.

The amp otherwise is working and I can hear both channels and they seem to in balance.


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PostPosted: 14 Oct 2017, 08:44 
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Joined: 13 Oct 2017, 04:14
Posts: 1
Built this little amp a week ago and i just can´t get it to work... every voltage seems to be fine, the voltages on the pins, on the mosfet and the lm317. But no sound. I tried diffrent potentiometers, inputs, headphone jacks and no diffrence. Can the MOSFET´s be damaged if they put out the right voltages?

Thanks for replies! ;)


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