My 10k resistor mod to override the amplifier mute, is causing problems with speaker thump. Also, checking a different method of enabling the aux input (which doesn't work). Explaining the function of the 2 DIP switches.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
You don't need a switch to mute the amplifier when switching on. Leave the 10k resistor connected, and connect an electrolytic or tantalum capacitor between the mute terminal and 0V. (Perhaps you can increase the resistor value to 100k and use a 10 uF tantalum capacitor to give a 1 second time constant).
You might need to connect a diode across the resistor to discharge the capacitor when switching off.
What about latency? Is that good?
have you tried any resistor rating.? may be it would work in less resistance
Got same (well, it looks the same, but as we know that means nothing :-)) board that I've not played with yet. Just wondering how bluetooth security works. If my bluetooth source isn't connected, can my neighbour randomly connect? Was kinda hoping you have to put the thing in pairing mode but the video seems to suggest that's not the case 🙁
Anyone know?
Mine dose this and i have not modified it
Hey Julian I was wondering how this project was coming along. (How you plan to charge the completed project.) I was wanting to do a similar project. Perhaps not that specific bt amp but something around 15w per chan. And a USB charging circuit for an iPod / phone
Berta, das Ei ist hart! Das Ei ist hart!
So why did I watch this? Was it to remind us you have a bluetooth amp module and 1 speaker still connected by loose wires?
Why would you even upload a failed test of the 3 second mute thing.
Seems like a lot work for a cheap piece of shit amp.
Is there a way that you could tie into the microcontroller to perhaps reprogram it? I mean it just occurs to me something like that might be possible with some bodge wires and a little patients. Provided that is, that they haven't scrubbed the numbers off the chip or used something that doesn't come up with any kind of schematic when you search for it. I think that might be something worth looking into because if you can just add the code to unmute it after the 3 second key-press that would make more sense to me than having to fit a switch into your project. I mean why make it more complicated than it has to be. And yes I do quite thoroughly realize the irony of that last statement considering the context…
rather than a switch use a relay and a capacitor so the relay closes a couple of seconds after switch on?
Ok my play pause idea didnt work with this module, worth a try
Cant you do a lil delay circuit between the power button and the resistor with a transistor and a cap limited by a resistor to make it charge up in 2-3 seconds then triggering the transistor to then put the resistor in series ?
This might not work with the power off doh but by the looks of things the power on was the most extreme.
julian, what about putting a capacitor in series with the output?
Hmm, I noticed that when you boosted the speaker volume it interfered with the focusing on your camera.
Possibly the force of the sound waves was moving the camera slightly?
Maybe you could do some testing of that?
Have you tried connecting the 3.5 audio in plug after the unit is switched on in case that auto switches it .