teensy 3.0 hardware questions

[manitou]

Paul,

what is the part number (or data sheet) for crystal on teensy 3.0?

teensy 3.0 can only source/sink 9 ma (correct?). If I'm driving an IR LED with PWM (at 38kHz), do I need to worry about that 9ma current limit, or does PWM give me some (how much) headroom? 100 ohm with IR LED (1.2v forward voltage) draws 20ma.

thanks for helping a software guy.

 

[Qumefox]

I think it's 18mA. 9mA is for the low power version of the ARM chip.

I know my teensy 3 has no issues with directly driving normal visible LED's. You will have to keep in mind that the outputs on the teensy 3 are 3.3v though.