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Forum Index : Microcontroller and PC projects : Nice little amp for the Pico etc.

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matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 9201
Posted: 12:42pm 02 Nov 2024
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12V barrel jack power and the output seems pretty immune from noise on the supply. Quoted as 15W per channel. Take that with a pinch of salt but still plenty of oomph with no obvious distortion. 3.5mm stereo jack input and screw terminals for the speakers. Works like a treat on the pico using volhout's magic filter.




This is the module

and here is the stl for the box 52mm x 48mm x 30mm


ampbox.zip
Edited 2024-11-02 22:43 by matherp
 
Mixtel90

Guru

Joined: 05/10/2019
Location: United Kingdom
Posts: 6870
Posted: 12:59pm 02 Nov 2024
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Extortionate price, of course. :)

Your ears will love you if you stick to a maximum of 8W per channel into 8Ω with a 12V supply, giving 0.1% THD. That is soddin' loud in the average living room though. :)
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
JanVolk
Senior Member

Joined: 28/01/2023
Location: Netherlands
Posts: 146
Posted: 02:19pm 02 Nov 2024
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Look at AliExpress for even cheaper prices. Already seen under 3 Euro including shipping costs.
Has excellent specifications.
Power at 12V DC
    5W 8Ω --> THD+N=0.1%
    8W 8Ω --> THD+N=1.0%
   10W 8Ω --> THD+N=10%
   15W 4Ω --> THD+N=0.1%
   Efficiency: >90%
It says here that it is a 2x10W with this configuration and if a larger heat sink is used, 2x15W.
Also nice to use the extra connections such as mute and the power switch.

Jan.
 
stanleyella

Guru

Joined: 25/06/2022
Location: United Kingdom
Posts: 2158
Posted: 06:57pm 02 Nov 2024
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so many stereo amps eg https://www.ebay.co.uk/itm/176549329564
https://www.ebay.co.uk/itm/166138117595
 
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