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  1. Replies
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    Count ADC multiplexing delay

    Dears,

    I want to count the delay in multiplexing ADC modifying this code:



    #define ADC_RING_SIZE 0x2000

    DMAMEM
    volatile uint16_t
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    for small projects you only need a good...

    for small projects you only need a good thermocouple (without sheath to fast response) and a solidstate rele to make you own reflow oven...
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    take a care if you need the gps to get the...

    take a care if you need the gps to get the position or time, if you need the gps to sync a RTC, use a gps with PPS, like this http://www.adafruit.com/product/746, or make you own module with this...
  4. cut out for the "USB Cable, Micro-B to Standard-B Panel Mount Adaptor"

    Hi,

    Can I get the cut out for the "USB Cable, Micro-B to Standard-B Panel Mount Adaptor":
    https://www.pjrc.com/store/cable_usb_panel_micro.html

    I would like something like this:...
  5. Thanks!!! I'm trying to resume your work in...

    Thanks!!! I'm trying to resume your work in Github with a fork of qemu (mirror repository) https://github.com/lsaavedr/qemu
  6. from https://www.pjrc.com/teensy/td_uart.html for...

    from https://www.pjrc.com/teensy/td_uart.html for use with a RS232 hardware try:



    void setup() {
    Serial1.begin(38400, SERIAL_8N1_RXINV_TXINV);
    }


    regards!
  7. yes, this type of noise increase in pines close...

    yes, this type of noise increase in pines close to CLK pin, I don't know why, perhaps is a pcb bug??? or is a bug in the mcu design???
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    Teensy 3.1 temperature rating

    Hello all, reading this thread, Paul say that the crystal is the limiting part, with a minimum spec at -10C, my question is if there exist a possibility of reemplace this crystal for get a lower...
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    b3) A really good LDO option for Teensy3.1 is...

    b3) A really good LDO option for Teensy3.1 is LT1962, teensy3.1 have two chips, the MK20DX256 (with 185mA max. supply current) and MINI54TAN (with 120mA max. supply current), I suspect that it is...
  10. that filter is for the dígital 3.3v?

    that filter is for the dígital 3.3v?
  11. why is necessary decoupling capacitors if the...

    why is necessary decoupling capacitors if the batteries of 5v and 3.3v are different? (they aren't already decoupled?). The only conection between they is the inductance in the teensy board, of...
  12. the waveform was writing in the microSD with the...

    the waveform was writing in the microSD with the teensy 3.1 board at 4ksps

    you can see the complete circuit in the upverter repo (upverter is very slow and almost unproductive):...
  13. whith a separate battery and 3.3v LDO.

    whith a separate battery and 3.3v LDO.
  14. Some steps to mitigate this noise, but without...

    Some steps to mitigate this noise, but without success:

    * Use GND for the microSD circuit and AGND for everything else.
    * The only connection between AGND and GND is found in the teensy.
    *...
  15. How to avoid noise when writing to the microSD?

    In any ADC acquisition system, there are a moment when your must be write in the microSD, but when this happen the noise induced when are writing in the microSD are registered whith the ADC...
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    thanks!

    Thanks!!!, in the link don't specify if the 10k resistor is needed, and the final question is... is the pullup 10k resistor (in the MISO pin) needed for some reason???
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    sd-adaptor for teensy 3.*

    Hi,

    Is it possible to avoid the 74LCX125 to make a more simple sd-adapter for the teensy 3.*?

    regards!
  18. Great t3andy!!!, I'm also working on a datalogger...

    Great t3andy!!!, I'm also working on a datalogger with teensy 3.0:
    https://github.com/lsaavedr/centinela without power manager and PCB, but I would like to integrate your contributions, is this...
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    sdadaptor in the protoboard with and without...

    sdadaptor in the protoboard with and without boards: 662 663

    and the benchmarck with Sandisk Extreme Pro:



    Does anyone know why "Free RAM: -89" in the last test?

    regards!
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    Thanks!!! Good Job!!! ¿there exist some "revision...

    Thanks!!! Good Job!!! ¿there exist some "revision control" to contribute or get some devel branch of Teensyduino?
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    Teensy 3.0 PCB layouts

    Hi Paul,

    there exist a posibility of view the teensy 3.0 PCB layouts in pdf or in any other format, only with the intension of compare their layout with the factory recomendations, or some other...
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    See pag.96 of K20P64M50SF0RM.pdf, any of the...

    See pag.96 of K20P64M50SF0RM.pdf, any of the ADxxa is reserved, Can you try with A9, A7 or A6???, for example...
  23. use sample.h as guide only, you can try also with...

    use sample.h as guide only, you can try also with centinela.ino, I am currently working on improving it, regards!

    PD1: There exist a lot of cmason MACROS different from the original, I hope I do...
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    There exist some possibility to add public...

    There exist some possibility to add public functions to IntervalTimer class, like:


    public:
    ...
    void enable() { *PIT_TCTRL = 3; };
    void disable() { *PIT_TCTRL = 2; };
    ...
    ...
  25. 300-8763-ND and 300-8303-ND are the same!, see...

    300-8763-ND and 300-8303-ND are the same!, see the datasheet!
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