without going into amplifier design…and types generally …
it uses the same ground point for each channel in this and most cases…its just duplicated …
so you would connect your leads to this board by joining both grounds to its ground pad…or just use a 3.5 mm phono stereo to rca lead and use the onboard audio jack
in the case of bridged amplifiers…etc and alike.they have two separate grounds or earths if you will…
depending of the amplifier class design
You typically only need separate grounds on the output of the amplifier (particularly when you have an amplifier per channel). For line level outputs like on this board, you can get away with a common ground.
Hey. I was thinking of getting this to make a bluetooth speaker, and I was wondering, Can I attach LED’s to the Wired Speaker Output (the Left, Ground, and Right pads), and if so, what ones should I use?
There is an LED indicator already on the module, what are you hoping to achieve by connecting LEDs to the audio output?
The audio output is expecting an inductive load, usually around 4 Ohms, connecting a diode there might produce some strange results.
Ahh, you probably want something that does a fast fourier transform. I’m sure I’ve seen a dedicated chip in the past that does exactly that and makes it really easy to implement but I can’t seem to find the one I’m looking for atm.
An MSGEQ7 is chip that will be able to achieve this. It is much more computationally intense to compute in software vs the chip, the math is quite interesting as well, especially trying to compute it in real time.
While you will be able to change the name you have to reprogram the chip presumably using the 4 pads on the back, I found a trail somewhere online and once I find some more info I’ll get back to you
EDIT: it looks like theyre on holidays at the moment so it might be a while… No worries though, if you zoom in on your phone with the flashlight on you might be able to get the letters and numbers on the chip
Hi. I have a couple of these boards and they work very well, but the range is short in comparison to other Bluetooth devices I have. Is there any easy way of extended the range with some kind of external aerial? Thanks, John