According to PJRC ...
"Today most new chips use 3.3V signals, but many legacy products output 5 volt digital signals. These can now be directly connected to Teensy 3.1's digital inputs.
All digital pins are 5 volt tolerant on Teensy 3.1. However, the analog-only pins (A10-A14), AREF, Program and Reset are 3.3V only. "
The primary components of my project are a Teensy 3.1/Octows2811 combination and a nominal 5v 350W/70A power supply and 796 5v ws2811 LEDs.
I have 5 nominally 10K potentiometers (installed on pins A5, A4, A3, A11, A10) which are currently supported (no pun intended!) with that 5.v input. I haven't tested yet but after coming across the preceding PJRC caveat I'm left wondering how to proceed:
still learning
mb
"Today most new chips use 3.3V signals, but many legacy products output 5 volt digital signals. These can now be directly connected to Teensy 3.1's digital inputs.
All digital pins are 5 volt tolerant on Teensy 3.1. However, the analog-only pins (A10-A14), AREF, Program and Reset are 3.3V only. "
The primary components of my project are a Teensy 3.1/Octows2811 combination and a nominal 5v 350W/70A power supply and 796 5v ws2811 LEDs.
I have 5 nominally 10K potentiometers (installed on pins A5, A4, A3, A11, A10) which are currently supported (no pun intended!) with that 5.v input. I haven't tested yet but after coming across the preceding PJRC caveat I'm left wondering how to proceed:
- Will I fry the Teensy with 5v to the pots/analog inputs or will the pot readings simply be unreliable (or will it just magically work)?
- Do I merely need a current limiting resistor in the 5v power line to achieve the 3v max input for the pots/analog pins?
- If yes to above, what value resistor will I need (I know the voltage, natch, but not the current, I don't think)?
- Is there any advantage to reduce the voltage to 3v for the digital pins too?
still learning
mb