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SJ2038 power audio amplifier module (HCMODU0071) 
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Joined: Sun Aug 05, 2012 4:02 pm
Posts: 670
Post SJ2038 power audio amplifier module (HCMODU0071)
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A small 2 channel audio power amplifier module (HCMODU0071) with built-in volume control based on the SJ12038 IC.

Working supply voltage: 2-6V DC
Integrated SJ2038 BTL audio power amplifier.
THD < 10% at 6V supply.
Can drive 2.2W into an 8ohm speaker
Can drive 3.5W into a 4ohm speaker
Convenient screw terminals for speaker connection.
On-board volume control
Dimensions: 36 x 26 (mm)



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Thu Sep 18, 2014 1:49 pm
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Joined: Thu Dec 11, 2014 7:41 pm
Posts: 6
Post Re: SJ2038 power audio amplifier module (HCMODU0071)
anyone know how you wire this up and what you feed in? No instructions or useful spec in the bag.


Thu May 21, 2015 2:43 pm
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Joined: Sun Aug 05, 2012 4:15 pm
Posts: 708
Post Re: SJ2038 power audio amplifier module (HCMODU0071)
The module is pretty basic in the way it works. It is a dual channel audio amplifier in that you can amplify two separate single ended audio signals. You can connect one to INA & GND, and the other to INB and GND. On the output you can connect two 8 ohm speakers, one to OUTA + & -, and the other to OUTB + & -.

To power it connect a 2 to 6V power supply (5V ideal) to the inputs GND (-) and VCC (+). Volume can be adjusted using the dial.

Edit: A diagram has now been added to the first post.

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Fri May 22, 2015 7:32 am
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