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How can you connect new BT 4.2 WTS audio receiver module with TPA3118 mono noiseless
How can you connect new BT 4.2 WTS audio receiver module with TPA3118 mono noiseless
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Old 22nd July 2018, 09:06 PM   #21
oxl is offline oxl  Denmark
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I decided to try to use this CSRA64215 APTXLL Stereo Bluetooth 4.2 Audio Receiver Board TWS Car Bluetooth Receiver Module For Amplifier Speaker DIY together with the TPA3118 PBTL mono 60W.
Can I make the CSRA64215 control the mute function of the TPA3118, so it mutes the amp when there is no audio from the BT module (paused or muted) ? Does the TPA3118 still use significant power when muted (is it still amplifying) ?

Aiyima CSRA64215 APTXLL Stereo Bluetooth 4.2 Audio Receiver Board TWS Car Bluetooth Receiver Module For Amplifier Speaker DIY-in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group

Last edited by oxl; 22nd July 2018 at 09:13 PM.
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Old 3rd August 2018, 09:25 AM   #22
oxl is offline oxl  Denmark
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The BT has a Mute pin that goes logical high when there is an audio signal (otherwise logical low). How can I use this with the AMP (Sanwu TPA3118 PBTL mono) Mute pins ?
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Old 4th August 2018, 11:20 AM   #23
oxl is offline oxl  Denmark
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Click the image to open in full size.
BT mono AMP 60W (35x75 mm)

Last edited by oxl; 4th August 2018 at 11:25 AM.
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Old 8th August 2018, 04:19 PM   #24
Nenola is offline Nenola  Finland
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The amplifier section is mono but you only get left channel signal from the BT-module. Some recordings might sound a bit weird. Or am I missing something here?
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Old 8th August 2018, 09:54 PM   #25
oxl is offline oxl  Denmark
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It is because I am using two of these with TWS (would be easier if I could find some with CSRA64110 - composite mono)

Last edited by oxl; 8th August 2018 at 09:57 PM.
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Old 16th August 2018, 12:40 PM   #26
oxl is offline oxl  Denmark
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Or I could connect the two outputs via two 100 ohm resistors to input
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Old 24th August 2018, 10:30 PM   #27
nigelwright7557 is offline nigelwright7557  United Kingdom
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I just finished a project doing a similar thing.
I dropped 12 volts down to 5 volts for the BT using 7805 wit hheatsink and it worked fine. I had a few problems connecting Bluetooth to pc but managed in the end.
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