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  1. Challenger2011

    Teensy 4.1 - Internal Equivalent Schematic of Digital I/O Pins

    Thanks for the reference, I note in the RT1060 Processor Reference Manual that there seems to be three options... Other threads have suggested this too. 47k, 100k, or 22k. Ive used all options on pin 14 (A0) to see if my math will display the correct capacitance values and no dice. I...
  2. Challenger2011

    [Teensy 4.1] I/O Pin Internal Capacitor and Resistor Values

    Ive been looking into how I would do this, and it is a little unclear to me. As an example, I could get a 1k ohm resistor and put it in another analog pin, set that to charge with R_PULLUP in my code set to 1k, and then keep the discharge pin as is? Wouldn't the 1k resistor just add to the...
  3. Challenger2011

    Teensy 4.1 - Internal Equivalent Schematic of Digital I/O Pins

    Hello, I am making a teensy4.1 capacitance meter running the adc at 12 bits. My code is posted below for one of my two code snippets, the one below is for small capacitors which is simply being charged and discharged via two analog pins. I am in need of the 4.1's internal I/O pin equivalent...
  4. Challenger2011

    [Teensy 4.1] I/O Pin Internal Capacitor and Resistor Values

    I see. Thanks for the input ~ so this method of measurement is pretty much impossible to setup on the teensy I take it? In the video, the measurements are at 9:36. Thanks again. :)
  5. Challenger2011

    [Teensy 4.1] I/O Pin Internal Capacitor and Resistor Values

    I am making a capacitance meter with a teensy 4.1. I have two circuits, one for higher values and one for lower values. I am working with the lower capacitance circuit currently, which is simply the capacitor connected to analog A0 and A2. I am looking for the ARM Cortex-M7 internal equivalent...
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