Plug speaker on Teensy Audio Shield without using jack adapter

S

samyrabih

Member
Hi all !
I saw L/R/GND pins near jack adapter on Teensy Audio Shield, is it possible to connect 4 ohms speaker on it ? (with amplifier between speaker and shield)

Can I use the shield ground instead of this GND "without hole" pin ?

Or should I use line out pins to connect my speakers?
 
samyrabih said:
EDIT : I will test with a multimeter if the L/R/VGND of the board are connected with jack contacts
Click to expand...

Note, I'm a software guy, but IIRC, the 3.5mm jack on the audio adapter is set up for headphones while the L/R/GND pins are set up as line level. You can use the following member functions to control which port is used:

  • muteHeadphone (void);
  • unmuteHeadphone (void);
  • muteLineout (void);
  • unmuteLineout (void);
  • inputSelect (AUDIO_INPUT_LINEIN);
  • inputSelect (AUDIO_INPUT_MIC);
  • headphoneSelect (AUDIO_HEADPHONE_DAC);
  • headphoneSelect (AUDIO_HEADPHONE_LINEIN);
  • lineOutLevel (uint8_t n);
  • lineOutLevel (uint8_t left, uint8_t right);
  • dacVolume (float n);
  • dacVolume (float left, float right);

Here is a link I found via a google search:

 
[SOLVED] Plug speaker on Teensy Audio Shield without using jack adapter

Thanks Michael for your answer, but I was not very clear in my explanation.

I talked about the L/R/GND pins near the jack:

Sans titre.png

EDIT : I made tests today and it appears (using two poles jack connector):
- One wire is linked to L pin
- the other wire is linked to GND and R pins

I was able to hear audio by connecting on L and R pins :)
 
Last edited:
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