https://w.electrodragon.com/w/index.php?title=1743NRZ&feed=atom&action=history1743NRZ - Revision history2024-03-29T00:55:04ZRevision history for this page on the wikiMediaWiki 1.37.2https://w.electrodragon.com/w/index.php?title=1743NRZ&diff=20073&oldid=prevChao at 08:19, 5 July 20182018-07-05T08:19:47Z<p></p>
<p><b>New page</b></p><div>== Pin Definition ==<br />
{| class="wikitable sortable"<br />
|-<br />
! Pin !! Description !! Connection !! Circuits<br />
|-<br />
| +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<br />
|-<br />
| GND || power ground, audio ground. Short as possible || Must lead out two wires to connect to power ground and audio ground seperatedly. || -<br />
|-<br />
| Left channel || (1) || to amplifier left channel || via a capacitor (depending on the input matching the amplifier)<br />
|-<br />
| Right channel || (1) || to amplifier right channel || via a capacitor (depending on the input matching the amplifier)<br />
|-<br />
| Mute || default - 3V / mute - low, or use transistor to reverse TTL || to amplifier mute || -<br />
|-<br />
| The status indicator || flash - not connected / non-flash - connected, weak drive, use red LED or transistor to gain high drive || - || resistor + LED<br />
|-<br />
| Reserved port || default - high / power-down - low || - || can use with switch<br />
|}<br />
# It is recommended to connect a capacitor (depending on the input matching the amplifier) at the output port.<br />
<gallery><br />
File:Bt-audio_02.png | main circuit diagram<br />
File:Bt-audio_03.png | reverse mute signal logic high / low<br />
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.<br />
File:Wiring_and_noise_01.png | wiring and elimate noise 01<br />
File:Wiring_and_noise_02.png | wiring and elimate noise 02<br />
File:Wiring_and_noise_03.png | wiring and elimate noise 03<br />
File:Wiring_and_noise_04.png | wiring and elimate noise 04<br />
File:Wiring_and_noise_05.png | wiring and elimate noise 05<br />
File:Wiring_and_noise_06.png | wiring and elimate noise 06<br />
<br />
</gallery><br />
<br />
* For debug please see on this page. [[:category: Bluetooth Audio]]<br />
<br />
[[category: BT Audio]]</div>Chao