Diferential audio preamplifier for(example) bluetooth modules, requires only positive power source, no negative rail requiredDesigned by Tomas Kovacik in Slovakia
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Audio preamplifier with differential input for bluetooth modules based on OVC3860 chip, in my case: blk-md-spk-b S3860M-S XS3868 BK8000L I made this (based on online documentation, and reverssing...Read More…
Audio preamplifier with differential input for bluetooth modules based on OVC3860 chip, in my case:
I made this (based on online documentation, and reverssing from pictures of discontinued product) just for easy development, becaose output ground of this modules can't be connected to power ground ( it has 0.9V offset, in case of OV3860 based modules)
also this could work with F-3188 BLE bluetooth 4.0 module based on CSR8645
It used 12V, I used NE5532 (no luck with LM358), but you can used whatever you want. Also I can populate it or give you parts.
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Fabio | Sept. 19, 2019
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