Teensy 4.1 MQS

[danieltsz]

Hi, I have a little question. I'm using Teensy 4.1's MQS to have an input on my digital power amplifier. These ports use the MOSI MISO and CS port of Teensy 4.1 (SPI_1). My question is, can I the MQS port and use the SPI port at the same time or do I need to use the 2nd SPI port? Thank you.

 

[KurtE]

If you are using MQS pins on pins 10 and 12, you will most likely not be able to use them for SPI at the same time. So you probably need to use a different SPI object.

 

[danieltsz]

okay thank you sir @KurtE

 

[danieltsz]

Hi, follow-up question. When using Teensy's MQS, is it safe to connect directly to an 8ohm speaker? I noticed that after 2 weeks of testing, my teensy suddenly stopped working when the speaker was connected to the MQS port.

 

[PaulS]

When using Teensy's MQS, is it safe to connect directly to an 8ohm speaker?

No, it's definitely not safe! A load of 8 ohm on a digital output pin is too much and may have killed the Teensy.

Paul

 

[danieltsz]

What do I need to put in between Teensy board and my speaker sir @PaulS?

 

[PaulS]

Basically an audio amplifier. There are a lot of options ofcourse. Here is just an example.
You may want to put an RC filter between Teensy and amplifier, see this message.

Paul

 

[danieltsz]

Basically an audio amplifier. There are a lot of options ofcourse. Here is just an example.
You may want to put an RC filter between Teensy and amplifier, see this message.

Paul

Thank you very much sir @PaulS