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2x8W at 4 Ohm TPA3110 Class-D Audio Amplifier Board Only
Which potentiometer would be adequate for this board? I see several on you site but not sure which one would be best? 5k, 10k, etc..? https://www.parts-express.com/Search.aspx?keyword=potentiometer%20stereo&sitesearch=true
found the answer, 50k per the manual.
Date published: 2014-07-02
Is there a 3.5mm jack there?
Yes this has a 3.5mm jack for an input.
Date published: 2014-01-28
will this power supply give me MAX output.now i know this is the ideal power supply for the lepai 2020A+ but im not sure about this
Yes that power supply will be ideal for that amplifier.
Date published: 2014-01-27
Popping sound when powered on?
I built a little power amp with this board. I turn it on by plugging in the power supply (poor man's on/off switch). When it powers on, a "pop" comes out of the speakers. Does anyone experience this, and if so, what's the best way to remedy it?
that "pop" sound is simply the caps filling up with power, no need to worry
Date published: 2013-09-07
Would I need volume control with a bluetooth module?
I was thinking of using the BT-1A for input. Would I need a potentiometer for volume control or would the volume on the source device be sufficient?
This depends on your source device. If you can control the volume through bluetooth, then yes it will be sufficient
Date published: 2013-07-26
I purchased this board on Amazon and have been very happy with it, but I do have a slight complaint that I think can be worked out with a little help. I am an audio novice so I don't know a whole lot about fixing these issues.I set up this amp with two HiWave BMR12 speakers in parallel on each channel powered by a 12v 1a wall wart power supply. When I plug in the power it creates a low volume hum. Plugging a 3.5mm stereo cord increases the hum greatly, and the act of plugging it in (on either end) creates a lot of crackling. Adding a wire to the ground terminal and hooking it to a metal object reduces the initial hum, but does not help with the later hum.Interestingly, my computer creates a loud hum when plugged in, but my ipod actually reduces the hum. My computer does not create a hum on any other set of speakers.Does anyone have a suggestion on how to reduce the humming both before and after the 3.5mm cable is plugged in? Research tells me it might be a ground loop but I don't know how to fix it.
Your hum could be a couple of things. Ground loop is a possibility, but the 12v 1a wall wart suggest you have noise on your power input.Assuming you have a low cost wall wart, it is most likely unregulated. An unregulated supply should never be used for audio. Not only is there a noisy power input, but the voltage coming from the power supply can be much greater than 12 volts. Search for "unregulated power supply tutorial fun spark" to find out why. To fix it, a simple 12v ic linear regulator after the wall wart with some caps should dramatically improve your amps performance.However before you go buying some more parts, try checking to see if this is the problem. You will have to find a 12v regulated supply or even a 12v battery set up (12V SLA or 12V NiMN pack or even 8 AA in series[they probably wont last long but for testing it should work]). If the noise is still there, then I would try ground loop isolator.Best of luck.
Date published: 2013-07-03