Category:Bluetooth Audio

From ElectroDragon
Jump to: navigation, search

IC solutions

Bluetooth 2.0

  • OVC3860 - A2DPV1.2, AVRCPV1.4, V2.0+EDR,
  • CSR BlueCore5 - A2DPV1.2, AVRCPV1.4, V2.1+EDR
  • Beken BK8000L, Bluetooth v2.1 + EDR, A2DP v1.2, AVRCP v1.0,
  • CSR8635, CSR8645


Current noise

Power

  • Use soldering instead wires on power, or as short as possible, wires has large resistance.
  • Better use linear regulator, if use DC-DC must avoid ripples, add LC circuits filter. See left side.(L - 10UH, D - 4148, C - 10~100UF)
Bt-audio 01.png
  • For normal AC-DC adapter, inductor can skipped.
  • voltage must be 5V, not over 5V, 5.1-5.4V is not good
  • Must lead out two wires to connect to power ground and audio ground seperatedly.

Other issues

  • avoid interference signal, avoid large-size metals, avoid router, high power unit, etc
  • avoid fully closed metal case
  • Check different ground connection point to see the best place
  • do not touch it
  • If still noise, try to power supply amplifier and bluetooth module board seperately

Weak bluetooth signal

  • Powr supply interference, ripples
  • Power supply incorrect voltage
  • delete former matched modules, and re-pair

Pages in category "Bluetooth Audio"

The following 6 pages are in this category, out of 6 total.