I am having difficulties with a project I have been working on for some time.
I thought I had it working, but I get intermittent issues\overheating, and am unsure what the problem is.
I’ve basically got an OLED screen, DFPlayer and rotating switch. All seemed to function nicely, but now the DFPlayer keeps overheating\blowing.
I’m happy to pay someone in the UK who can take a look at my setup and see what the issue is\fix it. I need someone in the UK, as I would like to post out everything for you to test\fix.
Please let me know if you can help, look forward to any replies.
I have an Oled monitor with SDcard, which steps through various images, and stops on the final image. This image is a selection page. The rotational switch lets the user change to different objects on that final screen. When the switch is rotated another image is shown, and a sound plays from the DFPlayer. There is also a button which when pressed will play a different sound. Its for a cosplay prop.
Without a wiring diagram, a knowledgeable person would have to personally inspect your setup and create one, before offering advice. Schematic diagrams and symbols explained
6V on the USB connector is likely to cause problems. 5V on the USB connector is fine. I think, but not everyone agrees with me, that 5V on the 5V pin is okay (but not more than 5V). 6V on Vin probably won't cause any harm, but might not work properly.
No.
A Nano Every already has a built-in buck converter.
Just power the Every on the V-in pin with 9volt, comprised of AA batteries.
You can then draw almost 1Amp from the 5volt pin to power the MP3 module.
I assume you didn't do something wrong with the speaker, like connecting one pin to ground. The speaker for this module must be connected between the two speaker outputs.
Leo..
The setup already has some electronics which are powered by a Ni-MH 6.0V 5000mAh Hump Battery. I wanted to utilise this existing battery to power my arduino.
So 6v is not enough for the 7v min vin pin, but too much for the 5v USB connection?
What is the best way to use this battery? Put a buck converter between the battery and the USB input on the arduino?
It's quite an ambitious project if you really are starting from scratch.
You need to understand all the components, power requirements, maximum ratings etc.
Invest your time in getting the basics to work, individually, then put it all together.
If you are "blowing" these DFPlayer modules, then some parameter is being exceeded or is out of specification.
You aren't going to learn anything by getting someone else to do it for you.
You should be learning from mistakes. Finding out why something fails is where to learn things.
There's always an urge to get it all running, but time spent in preparation is time well spent.
That speaker is OK. Wattage of a speaker is irrelevant.
The amp of a DFPlayer is "bridge-mode Class AB", which in theory can produce <1.5W in a 16 Ohm load.
Leo..
Ok so a wiring diagram. This is being powered by the USB via PC or a wall socket (at the moment). The idea is to get it powered by a 6.0v 5000mah battery.
If everything will run off 5-volts and you want to power it from 6-volts (battery), then you don't have a lot of headroom.
6-volts is nominal, might be higher, might be lower.
Look for a Low Dropout (LDO) buck regulator.
The dropout figure for the regulator will tell you how low you can take the battery voltage before the regulator plays up.
A nickel hydride cell is about 1.2-volts charged, so if it has 5 cells, it's 6-volts.
You might get away with it, but a higher voltage would give you a better headroom to work with.
