Cheap Bluetooth audio receivers explained: pros, cons, how to use

Рет қаралды 949

Күн бұрын

Time to explore the peculiarities of these cheap Bluetooth receiver modules. They let you easily and cheaply add Bluetooth audio connectivity to sound systems with analog input: old stereos and radios, iPod docks, car hi-fi and more. They offer okay sound at a very low price. For DIY enthusiasts, these Bluetooth modules can be used for making cheap wireless speakers.
But shopping for these can be a gamble. Sometimes the range is great, sometimes - not so much. Noise could be an issue too if the wiring is less than optimal.
🛒 Shopping links*:
🟢 Bluetooth AUDIO RECEIVER:
➡️ Amazon US amzn.to/3yA6y2g - according to the reviews, these are reliable and don't have the Chinese lady voice
➡️ AliExpress: bit.ly/3V5SzJ1
⚠️ As mentioned in the video, it is hard to tell how these modules behave exactly looking at the shopping page alone.
🟢 The oscilloscope I use: amzn.to/3J71k02 (Amazon US)
🟢 The wireless microphone I use: amzn.to/4bGMnPh (Amazon US)
🟢 OLFA cutting mat: amzn.to/3HX3Ipp (Amazon US)
🟢 A Basic Multimeter: amzn.to/43Cjnom (Amazon US)
🟢 Mini Breadboards:
Amazon US: amzn.to/3vvFtfC
AliExpress: bit.ly/brdbd1
🟢 3.5mm Breakout Board:
Amazon US: amzn.to/3V36ilb
AliExpress: bit.ly/3UItDr0
🟢 OLFA Cutting Mat: amzn.to/3HX3Ipp
*Affiliate links. I may make a small commission, but the price you pay DOES NOT change. Your support helps me make more videos. Thank you!
Stock Photo Credits:
Anna Tarazevich/Pexels: www.pexels.com/photo/stereo-a...
Ivan Rudoy/Unsplash: unsplash.com/photos/a-bunch-o...
CHAPTERS:
0:00 Introduction
0:19 What do Bluetooth receivers do?
2:03 What they cannot do
3:01 How to power them
5:16 How to connect to speakers?
5:56 Bluetooth range
6:45 Sound quality
7:23 Bluetooth noise issues?
9:01 Chinese lady voice
9:56 Conclusion
#electronics #diy #bluetooth
*******
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Пікірлер: 19

@DrFailov Ай бұрын

Good video and useful information

@Loujemouse Ай бұрын

Great video! I was thinking of upgrading my old speakers so they would work with bluetooth

@mykflyst 2 күн бұрын

💯

@parsipax6337 Ай бұрын

get the m18, it has key pinout for controls 😊

@309electronics5 11 күн бұрын

Unfortunatly there is no way of turning of the voice. Its included by default in the sdk and usually manufacturers dont change much and just compile in the default template because it saves money and they wont need to hire programming people. Also the sdk is not really fully documented well. Some boards that dont have usb sound card functionality can still have it implemented in the firmware and board layout (becauss again manufacturers are lazy to desugn their own thing and use premade schematics) but they just dont place a resistor or jumper disconnecting the usb data lines but leaving pads that can be bridged. I had some models like that. Also if you do plan on tinkering with the firmware, they can be programmed using usb in DFU mode. You have to put a specific signal across the usb pins to put it into dfu mode. The Dfu mode is burned into the bootrom of the ic so you wont erase the functionality. The chips also use UBOOT as their bootloader. They use JieLi's sdk to compile and flash the code onto the flash

@LeftyMaker 11 күн бұрын

Very useful info!

@shadowhunterxxx5891 Ай бұрын

There is many bluetooth module with amplifier that used common power supply without any noise but when used tow seprated module with LC filter and short wires still there is ground loop noise

@LeftyMaker Ай бұрын

Yes, I have come across good ones, but all I've tested with a JieLi Bluetooth chip have had beeping noises. The better the speakers, the more you can hear them. CSR BT modules are much less noisy and have never had lady voices too

@myshticaanimo2169 Ай бұрын

Can't find these JL ic data sheet 😭

@LeftyMaker Ай бұрын

search JieLi on LCSC.com and one/some of the chips there are probably on these boards

@myshticaanimo2169 Ай бұрын

@@LeftyMaker I will try Thank you😇 it work I was trying to find this manufacturer from long time

@309electronics5 11 күн бұрын

These ics dont really have any great documentation and it requires some digging. Also the number on the ics dont match with any datasheets and are likely firmware revisions and id number of the mfr. Most are from the JL ac69xxxx family

@myshticaanimo2169 11 күн бұрын

@@309electronics5 thanks❤️😇 But somehow almost every Bluetooth ICs are from them

@VandalIO 14 күн бұрын

You had the Bluetooth transmitter in the floor ! You should have tested the range when the transmitter was atlas 1.5 meters off the floor

@LeftyMaker 14 күн бұрын

is the floor lava or something?

@VandalIO 14 күн бұрын

@@LeftyMaker 🤦‍♀️

@VandalIO 14 күн бұрын

@@LeftyMaker comment was meant as constructive feedback ! It’s radio transmission 101, transmitters ideally need to be above ground or sea level to reduce *multi-path interference* and reduce *fresnel zone interference* having them higher than ground could have produced more meaningful result in real world scenarios