Good morning to you all. I’m half way of building my tonuino and I have faced another problem. I want to connect the dfplayer to an amplifier board, as I want a big rich sound with stereo speakers and some 50 watts. I tried to power both arduino and amplifier from the same lithium battery, taking tw…

[IMG_3892] a photo of my amp board, in case there is someone with a great idea!

[Bild] dabenza: I tried to separate the power supplies (1battery for the amp and another independent for the arduino) The big starting noise stays but the noise hiss is much better. You could try to use the Arduino with 12V on Vin. It needs more energie because the heat to transorm, but it it…

[Bild] dabenza: The big starting noise stays For direct speakers many users use two mosfets [Bild] Geräusch beim Start der Box, allerdings nicht bei jedem Start Hardware Ich hab es gelöst! Ein MOSFET war zu wenig, aber mit zweien gehts. Antiserielle Schaltung hei…

Some noise comes from the step up. It uses frequenzy to make the higher Voltage. And some boise comes fromthe df player itself. This is a low budget projekt for kids, no hifi. At first you need a clean power supply. It would be better if you find an amp that works with 6-7V and use two Batterys

If you want use another amp, try to get an amp with mute Pin. Than you can connect the mute input with the Nano for mute the amp while the Tonuino is starting.

I’ve also had trouble with the dfplayer and a amplifier in a different project. I could reduce the noise with a Tesla B0505S.

my batteries are 3,7 lithium, I dont really understand what I get from feeding the arduino 12 volts. I will have to use the same battery as I was intended to do primarily

Do you mean using an amplifier with 2 mosfets per channel? I think it is going to be a big thing, for a small project, not sure I want that, besides, it will need probably a lot of energy from just a battery…

Thanks for the replies! i fully understand this is no hifi, but there must be a way to reduce the noise to bearable levels. At the moment the background noise is only good enough with separate batteries. But I have no idea how to put 2 independent batteries, that feed two elements separately but are…

Why did you want 50W on a Battery device? Did you ever trued the 3W from.the DFPlayer on your speaker? The little box i have gets really loud. What kind of speaker do you use? can you make some pictures? Is there a posibility to youse a stationary power supply? Or a smaller amo with less supply …

Tonuino with amplifier big noise

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raznz_snasna 24. November 2021 um 07:16 4

For direct speakers many users use two mosfets

maybe you try 4 Mosfets for stereo signal