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How to create a Bluetooth amplfiier that runs off of its own portable power supply circuitry help - Electronoobs Q&A

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+1 vote

Hey mmate hope you are well!

I have been stuck for a while now on how I wire up correctly this Bluetooth amplifier that you used a long time ago back in feb 2017. In the video you use the TDA7492P CSR8635 Bluetooth 4.0.

You say in the desciption that you didnt use a protection circuit and give a link to an image showing how it should be updated. However, I dont understand how I can wire this up to the amplifier PCB correctly because in the circuit diagram you show it doesnt lead to the PCB.

All i am asking is could you please explain how I could wire this up correctly as im doing it for a school project and my teachers and I are stuck on how to get it working.

Thank you in advanvce mate if you see this message, mate!

Charlie Alexander

asked by (150 points)

1 Answer

0 votes

Sorry for late , i know the frustration of a project waiting...lets get into it

There are 2 types of lithium battery charging module available in market as you shown both uses tp4056 cc cv but one (the larger one consisting 2 chips) has 1 extra tiny ic for auto cut at low voltage generally at 3.3 v to 3.5 v it can be adjusted if you remove 1 of the smd resistors and replace that with potentiometer..any way were getting out of topic...if you have any questions regarding that fell free to ask...


Only the first image supports auto cut

Heres how to connet can see the output has 4 wholes 1 pair + - and 1 pair B+B-

Connect the B terminals to battery as mentioned and the load to adjucent +- terminals the and you may keep the circuit plug in through usb or you may directly attach wires through top wholes..

I wish your question has been answered, let me know if i missed something

Happy building..

answered by