Teensy 3.xx and h/w (DIN) MIDI

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ForestCat

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Hi,

My understanding is that the 3.xx series is fundamentally a 3v system w/ 5v 'tolerance' on the digital pins. I'm currently using a Mega 2560 for it's 4 UARTS, but it's running out of steam for my app.

Given the variety of MIDI h/w deviations out there, can the the Teensy 3.2 safely be used to connect to the outside MIDI world through an optocoupler on the inputs and a 220v resistor, etc., on the outputs? I guess what I need to know is whether the Tx/Rx lines are '5v tolerant'.

Thanks much.
 
Use this scematic modified as per the text for 3.3v teensy 3.x . Works for me ... note that because you are using an opto coupler, you don't need to stress about the rx input pin ... power the optocoupler with 3.3v!
 
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Thank you, Adrian. As many times as I've referred to that schematic when using my Teensy 2.0's, I never caught the text about the 3.xx resistors. Cripes, I'm getting old...
 
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Cool ... thanks .... I use perf board... note the lack of decoupling caps OMG!
 
For lot of people familiar with Arduino boards, think of Teensy 2.0 as good Uno, Teensy++ 2.0 as a better Mega2560 and Teensy 3.0 as a Due done right .It predates the Due
 
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