# Connect a piezo sensor board to audio-jack

**URL:** <https://forum.arduino.cc/t/connect-a-piezo-sensor-board-to-audio-jack/183505>\
**Category:** Audio\
**Created:** [September 15, 2013, 4:26pm UTC](https://forum.arduino.cc/t/connect-a-piezo-sensor-board-to-audio-jack/183505 "2013-09-15T16:26:41Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [September 15, 2013, 4:26pm UTC](https://forum.arduino.cc/t/connect-a-piezo-sensor-board-to-audio-jack/183505/1 "2013-09-15T16:26:41Z")

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Hi,

I’ll like to connect the “Grove - Piezo Vibration Sensor” to an audio-jack, but I have some doubts about the connections.

"Grove - Piezo Vibration Sensor" connections : OUT; VCC; GND

OUT -\> audio-jack (+)  
? -\> audio-jack (-)

VCC -\> arduino (5V)  
GND -\> arduino (gnd)

How I make the ? (gnd) connection to the audio-jack (-) ?  
(from a gnd of the arduino?)

[http://www.seeedstudio.com/depot/grove-piezo-vibration-sensor-p-1411.html?cPath=25\_26](http://www.seeedstudio.com/depot/grove-piezo-vibration-sensor-p-1411.html?cPath=25_26)  
[http://www.seeedstudio.com/wiki/Grove-\_Piezo\_Vibration\_Sensor](http://www.seeedstudio.com/wiki/Grove-_Piezo_Vibration_Sensor)

thanks,  
Carlos Esteves

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**Author:** ![marco\_c](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/marco_c/32/215057_2.png) [@marco\_c](https://forum.arduino.cc/u/marco_c)\
**Post date:** [September 16, 2013, 12:11am UTC](https://forum.arduino.cc/t/connect-a-piezo-sensor-board-to-audio-jack/183505/2 "2013-09-16T00:11:35Z")

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You are going to have to give us more clues as to the application you are trying to do.

Generally all the grounds in a circuit need to be connected together or the 'ground' will be different in the different part of the system.

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<div class="post-metadata">

**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [September 16, 2013, 2:33am UTC](https://forum.arduino.cc/t/connect-a-piezo-sensor-board-to-audio-jack/183505/3 "2013-09-16T02:33:18Z")

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Hi,

I simply want to connect this piezo board to a 1/4 audio jack to connect an audio-interface.  
It will not be possible?  
Or should I connect the GND to the audio jack instead of connecting to the arduino?

thanks

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<div class="post-metadata">

**Author:** ![marco\_c](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/marco_c/32/215057_2.png) [@marco\_c](https://forum.arduino.cc/u/marco_c)\
**Post date:** [September 16, 2013, 4:35am UTC](https://forum.arduino.cc/t/connect-a-piezo-sensor-board-to-audio-jack/183505/4 "2013-09-16T04:35:59Z")

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All the GND should be connected together (Arduino, Piezo, jack).

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**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [May 6, 2021, 4:15am UTC](https://forum.arduino.cc/t/connect-a-piezo-sensor-board-to-audio-jack/183505/5 "2021-05-06T04:15:01Z")

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