In this episode we are going to build a bluetooth speaker amplifier based on the TDA7492P class D audio amplifier coupled with a Bluetooth 4 module. We are not actually going to build the amplifier module because we can get that from China, very affordable, it only costs around $12 shipped which is way less that it would cost us to buy the bluetooth module and the TDA7492P individually not to mention the cost of fabricating a PCB of this size.
So we are actually going to use this module and build the final product with a nice enclosure and a suitable external power supply
Here are some links for the parts used to build this project:
- Bluetooth Audio Amplifier With Enclosure TDA7492P
- Bluetooth Audio Amplifier PCB Module TDA7492P
- Switching Power Supply Brick 24V 3A
- Aluminium Enclosure 110x66x24
- DC Power Jack Panel Mount
- 3.5mm Stereo Jack Panel Mount
- 4 Way Speaker Terminal
- Mini Rocker Switch On/Off 3A
- 100x100x0.5mm Thermal Silicone Pad
- 20x20x15 Aluminium Heatsink
- Countersunk Screw 3x6mm
- Brass Standoffs Kit
- Self Adhesive Rubber Feet
Wiring diagram below:
Great vid and write-up. I’m doing something similar and this helped quite a bit. Quick question. I want to have an LED indicate Bluetooth connectivity. I read that you just connected to the existing board pads for your power LED. Did you remove the existing red LED, or just solder to the contacts. The Bluetooth lamps look bit challenging to remove.
Again thanks for the write-up
I removed the existing LED, you can remove it using hot air or by creating a big blog of solder over the LED, this way heating/melting both solder joints.
Hi, where are the wiring diagrams for this build, I couldn’t find it in the description or in this link.
Thanka
I have added a picture to this article.
Very cool, BTW how does the red indicator light get wired to the board?
Thanks
connect to the existing led pads, after removing the smd led.