Chao at 08:19, 5 July 2018

2018-07-05T08:19:47Z

New page

== Pin Definition ==
{| class="wikitable sortable"
|-
! Pin !! Description !! Connection !! Circuits
|-
| +5V power supply || positive power supply, the voltage range of 3.4V ~ 4.5V, this range may damage the module, or lead to abnormal work. || to amplifier power || with two external capacitors if amplifier does not have
|-
| GND || power ground, audio ground. Short as possible || Must lead out two wires to connect to power ground and audio ground seperatedly. || -
|-
| Left channel || (1) || to amplifier left channel || via a capacitor (depending on the input matching the amplifier)
|-
| Right channel || (1) || to amplifier right channel || via a capacitor (depending on the input matching the amplifier)
|-
| Mute || default - 3V / mute - low, or use transistor to reverse TTL || to amplifier mute || -
|-
| The status indicator || flash - not connected / non-flash - connected, weak drive, use red LED or transistor to gain high drive || - || resistor + LED
|-
| Reserved port || default - high / power-down - low || - || can use with switch
|}
# It is recommended to connect a capacitor (depending on the input matching the amplifier) at the output port.
<gallery>
File:Bt-audio_02.png | main circuit diagram
File:Bt-audio_03.png | reverse mute signal logic high / low
File:Bt-audio_04.png | add external mute circits for amplifier which has no mute, 7002 up connect to L or R output, left to mute.
File:Wiring_and_noise_01.png | wiring and elimate noise 01
File:Wiring_and_noise_02.png | wiring and elimate noise 02
File:Wiring_and_noise_03.png | wiring and elimate noise 03
File:Wiring_and_noise_04.png | wiring and elimate noise 04
File:Wiring_and_noise_05.png | wiring and elimate noise 05
File:Wiring_and_noise_06.png | wiring and elimate noise 06

</gallery>

* For debug please see on this page. [[:category: Bluetooth Audio]]

[[category: BT Audio]]

1743NRZ - Revision history

Chao at 08:19, 5 July 2018