All Questions
61
questions
2
votes
2
answers
96
views
What is the function of the inductor in this Bluetooth audio module?
I found the circuit below for a Bluetooth sudio module that included a 100 mH inductor in series and then a 10 uF capacitor in parallel to the power input.
Image source: Iranian electronics seller ...
- 43
0
votes
0
answers
38
views
Audio noise when Bluetooth is connected
I'm making a Bluetooth speaker with a rechargeable Li-po battery. I had some noise coming from the speaker that I suppressed connecting a capacitor at the Bluetooth board's power source. Apparently I'...
- 111
0
votes
0
answers
53
views
Bluetooth transmitter headphone jack soldering points
I am in the process of modding a 7th gen iPod.
I have purchased a Bluetooth transmitter/receiver from AliExpress (VALORO 2 IN 1 transmitter) andtaken the PCB out. Noe I am unsure what points to solder ...
0
votes
1
answer
262
views
Is a matching receiver module needed in order to use a Bluetooth audio transmitter/transceiver/emitter module?
I'm using this audio Bluetooth emitter.
I connected it like so, the LED flashes, but no Bluetooth device is displayed on my phone or PC. How do I troubleshoot this or do I need a matching receiver ...
- 677
0
votes
1
answer
311
views
Indentifying a JL chip marked 'EE4222-1BB'
I'm new to electronics and my Bluetooth speaker broke and I want to fix it. This is the chip I think I need to replace.
Can you help me identify this IC marked 'EE4222-1BB'?
0
votes
2
answers
1k
views
Can an ESP32 be fed an audio signal and then output that audio to a Bluetooth speaker?
I have a CODEC circuit with a AUX audio output. Is it possible to connect that output back to the ESP32 and transmit to a Bluetooth speaker using the ESP32-A2DP library?
If so, would this be the ...
- 677
0
votes
0
answers
134
views
Audio mixer, one output to multiple inputs
I'm trying to create a device that will take one stereo input and send it to 4 or more audio Bluetooth transmitters. This way, I can connect my prjoector to it and everyone watching can listen in on ...
1
vote
0
answers
34
views
RN52 Custom Circuit Board Generating a Loud Buzz While Playing Audio
I'm in the process of creating a custom circuit board using an RN52 with a PIC16 controller to hack into my car's stereo and pretend to be a CD changer. The device does work, but while the audio plays ...
1
vote
2
answers
63
views
Noise in Audio Circuit Using BT Module
I recently built a simple audio circuit which includes an mp3 BT module. However, I discovered that it produced quite a disturbing noise (I don't have an oscilloscope, but from the sound it produced, ...
- 11
10
votes
3
answers
7k
views
Why are there no WiFi earbuds?
Because Bluetooth earbuds struggle in my home, due to its layout and electronic noise, I hoped to switch to WiFi technology, which has a good signal throughout the house. Either to connect earbuds and ...
- 219
3
votes
4
answers
2k
views
Audio frequency response over Bluetooth
Introduction :
Using some binaural beat meditation, the vendor claims that their sound frequency goes down to 5 Hz to get better meditation quality. Even though the human ear can't hear 5Hz, the brain ...
- 593
0
votes
1
answer
437
views
How to disable Bluetooth temporarily for line in to work in mini hifi amplifier TDA7492P? [closed]
The TDA7492P, a mini hifi amplifier with Bluetooth and line in does not allow line in, it jumps to Bluetooth soon after the start and blocks the line in signal.
It goes like this:
Power on line in.
...
- 203
1
vote
0
answers
210
views
Cheap Bluetooth receiver noise reduction
I bought this cheap audio receiver on a whim and found it was quite noisy on the audio channel.
I know it's a piece of junk, but I thought it would be an interesting exercise to learn what was wrong ...
- 74
0
votes
2
answers
238
views
How to enhance existing Bluetooth antenna on audio device (Pro-Ject BT Box E)?
I recently got a Pro-Ject BT Box E which is a BT receiver and DAC that sends the sound to an audio amplifier. The problem is that the range is so lame (less than 2m for undisrupted listening.)
I've ...
- 1
1
vote
2
answers
139
views
Bluetooth range extender for audio component
I have a Tascam CD-200BT audio component that is a Bluetooth receiver that I have installed in my school's gymnasium. Because of the location of the rack mount, I'm worried that the internal antenna ...
- 11