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Bluetooth Speaker (retro-fit)

A rear speaker from a surround system is retro-fitted with a 10w amp and a Bluetooth audio (A2DP) module

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Whilst I wait for delivery of the main audio processor for my other project (WiFi Center Speaker), this 48 hour project will fill the void of silence (that is the lack of music playing in the background). Fully enclosed, independent, powered speaker w/ Bluetooth (A2DP) connectivity.

Overall a complete success, easy to use, connect to (via Bluetooth) and easy use both volume controls (from the Bluetooth device [mobile / tablet etc] and from the rear volume control).
  • 1 × TDA2003 10 watt amplifier The main amplifier IC in a TO220 casing. Audio quality is not bad considering the ease of use overall.
  • 1 × 7812 Power Management ICs / Linear Voltage Regulators
  • 1 × 7805 Power Management ICs / Linear Voltage Regulators
  • 4 × 2200uF Capacitor Used to feed surges in power by the amplifier
  • 1 × Audio Transformer A cheap line isolation unit (LIU) that eliminates the digital noise from the Bluetooth module

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Discussions

mhm_khaledi wrote 04/12/2016 at 16:58 point

Hi buddy ..
Is there any way to send contact name and make a call to that name by xs3868 ?

  Are you sure? yes | no

Stuart Longland wrote 04/12/2016 at 17:44 point

A quick search seems to suggest the XS3868 is a module based on the OVC3860, for which there's an AT command set here: http://www.electrodragon.com/w/images/4/4b/BLK-MD-SPK-B_AT_Commands_OVC3860_List.pdf

(Gah, hit enter for a newline, then it posts!)

By the looks of things though, the unit implements A2DP, HSP and HFP profiles, you'd need OBEX or something to be able to transfer address book items to look up the number.  So that chip will let you dial a number, but won't let you do a name-based look-up as it doesn't appear to implement that Bluetooth profile.

  Are you sure? yes | no

mhm_khaledi wrote 04/13/2016 at 12:29 point

thanks ;)

  Are you sure? yes | no

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