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  1. protecting digital counting pins - 74HC4050 ?

    I want to use a shaft encoder that can output up to 12v square wave

    the 74HC4050 chip looks like it can be used to protect the pins and will take an overvoltage of 15v
    ...
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    Do you have a link to your tindie page ?

    Do you have a link to your tindie page ?
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    i would be happy to buy at $40 - much cheaper...

    i would be happy to buy at $40 - much cheaper than making them myself

    if you want to make some prototypes, I would be happy to commit to buying some

    I kind of see it like a ruggedTeesnsy shield
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    i reckon PJRC should sell a small screw sheild...

    i reckon PJRC should sell a small screw sheild adaptor that the Teensy plugs into that automatically protects the inputs and outputs - i would order one with every chip - there may be more profit in...
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    Measure over 3.3 v

    I will need a voltage divider to reduce the voltage of an input signal ie 12v

    Is there a chip / breakout board suited to this task

    Is there an easy way to allow the resistor to be adjusted for...
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    the problem was fixed by setting ...

    the problem was fixed by setting

    Serial.setTimeout(0);


    :)
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    FreqCount on multiple pins ? T3.2

    I see that freqCount uses Pin 13

    is it possible to use FreqCout on more than one pin at the same time ?

    Ideally 5 channels

    Is interrupts my best option (the frequency is typically under...
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    Hi Paul, yes I am looking to raise the voltage of...

    Hi Paul, yes I am looking to raise the voltage of a pwm output so i can drive another device.

    Can you recommend a circuit or a transistor that will perform.
  9. Me too ! I can move forwards now :)

    Me too ! I can move forwards now :)
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    Hi Paul A logic level convertor should to the...

    Hi Paul

    A logic level convertor should to the trick. Can they jump 3.3v up to 5v as well as 5v down to 3.3v
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    T3.2 output 5v ?

    The 3.2 is 5v tolerant

    Is it possible to get the pwm channels to output 5v instead of 3.3v
  12. Setting Serial.setTimeout(0) seems to have got...

    Setting Serial.setTimeout(0) seems to have got rid of the delays in the pwm timer
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    ok disabling interrupts did not work i then...

    ok disabling interrupts did not work
    i then tried ending serial and starting it again after the analogue reads - again no change

    in the setup i set Serial.setTimeout(0); was set to 1

    this...
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    thank you for the advice - i will try disabling...

    thank you for the advice - i will try disabling interrupts first :)
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    PaulStoffregen - what do you think is going wrong...

    PaulStoffregen - what do you think is going wrong here ?

    are the Serial interrupts interfering with the pwm timers ?
  16. "2. Will the interrupts for the serial...

    "2. Will the interrupts for the serial communication interfere with the PWM timers for the motor driver? In other words, when receiving data will the PWM waveform be effected or will it hold it's...
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    original post is here --...

    original post is here -- https://forum.pjrc.com/threads/56198-analogWriteResolution

    basically :-
    the pc sends data to a Teensy 3.2
    there are issues trying to process the data cleanly and getting...
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    update - i tried the Nano sending data with a 5ms...

    update - i tried the Nano sending data with a 5ms delay and the Teesny goes through periods of stuttering and then stuttering after a while it seems ok, then it struggles again (at 10ms delay there...
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    for some reason I don't seem able to get 2...

    for some reason I don't seem able to get 2 Teensys to talk to each other like the Nano / Teensy did earlier :(

    but either way i think this experiment shows the problem is in the Teensy not the...
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    Ok - i made some progress today with getting to...

    Ok - i made some progress today with getting to the bottom of the problem

    i wrote some code to an arduino nano - to replace the windows app and talk to the serial port directly




    int PWMVal...
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    this board is quite neat and uses a plug in...

    this board is quite neat and uses a plug in teensy

    http://www.plantation-productions.com/Electronics/Weensy/Weensy.html
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    i programmed this sketch // // Teensy...

    i programmed this sketch


    //
    // Teensy 3.x/LC simple internal temperature
    //

    #include <InternalTemperature.h>

    InternalTemperature Temperature;
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    the files got corrupted with xml information when...

    the files got corrupted with xml information when i downloaded them !

    all sorted
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    5v tolerant ?

    I see the Teensy 3.5 is 5v tolerant but the 3.6 is not

    what is the difference - is it the way the board is built or the actual chip itself ?
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    you need to deisign a board using a bare chip -...

    you need to deisign a board using a bare chip - or make a board that has 2x carriers so you can plug the Teensy 3.6 straight in - a bit like a motherboard / daughterboard
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    I cant seem to get this library to compile :S ...

    I cant seem to get this library to compile :S

    Archiving built core (caching) in:...
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    this is a great solution for the Teensy - it is...

    this is a great solution for the Teensy - it is designed for the nano and has an extra set of pins - but a very simple solution
    ...
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    wow internal temp sensor - thats awesome ! i...

    wow internal temp sensor - thats awesome !

    i will load a sketch and see what temp we are talking about
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    Hi Paul, thanks for the information and link...

    Hi Paul,

    thanks for the information and link to the code

    i am away for a few days and will think about a plan when i return

    i will get 2x teensy to talk to each other first and then try and...
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    overheating / dead 3.2 ?

    Yesterday i had a Teensy 3.2 fail

    it would intermittently power up - then stopped working

    I noticed the chip was quite warm


    today i was reading a frequency from another board using a...
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    thank you for your feedback and suggestions ...

    thank you for your feedback and suggestions

    using another teensy - thats a great idea !

    i will program another teensy to send data and report back the results

    ( i am also investigating how...
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    the windows app uses a custom control for serial...

    the windows app uses a custom control for serial communication called Tcomport

    https://sourceforge.net/projects/comport/

    The problem could be this -- i need to consider a way to write to the...
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    large volumes of serial data ?

    I have a windows app that transmits pwm information to a Teensy 3.2 (it is a replacement for an older board)

    i was finding some delays in the Teensy outputting the desired pwm and discovered the...
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    the delays i programmed have ruined the app - too...

    the delays i programmed have ruined the app - too much delay in the system now :(
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    I programmed some delays in the windows app...

    I programmed some delays in the windows app transmitting the data and the problem went away.

    However i can not use this as a solution, the teensy is replacing the existing board and it needs to be...
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    How do you access the pins on your dual backpack...

    How do you access the pins on your dual backpack ?

    Have you thought of a screw shield

    Might be an idea to sell on tindie
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    basically the windows app sends for example...

    basically the windows app sends for example "CH1500"

    CH1 is the channel Number followed by the PWM value

    it appears the first channel always send the data cleanly
    the second channel is sent...
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    small program to cycle pwm it seems to work...

    small program to cycle pwm

    it seems to work perfectly with no steps :)





    int PWMVal = 0;
    int I = 0;
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    Hi Paul, I was just thinking the same and came...

    Hi Paul,

    I was just thinking the same and came to check the forum !

    I think the serial communication is tripping over itself and the allocation of the first channel is getting updated whilst...
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    i have tried different pins and different...

    i have tried different pins and different frequencies- the problem is still there

    it appears if i sweep the pwm up and down the second pwm channel is stepping


    /*

    */
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    an article here using arduino ...

    an article here using arduino

    https://www.arduino.cc/en/Tutorial/AnalogToMidi
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    pitch to midi converter ??

    i was in the loft today and i found my old analogue synth and bass guitar

    I would like to play a note on the bass and convert the note to midi and play the synth !

    has anyone done a pitch to...
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    analogWriteResolution ?

    using TEENSY 3.2

    does analogWriteResolution(16) set the resolution of all pins or only certain pins ?

    i am using pwm on pins 5 and 6 and it appears the pin 6 is a lower resolution and its...
  44. i tried the program using an arduino nano instead...

    i tried the program using an arduino nano instead and it worked !

    after some experimentation it appears my windows app needed a delay when allocating port number
    a simple wait for 1 second is all...
  45. Driver problems Windows 10 vs Windows 7 ?

    I have a windows app that talks to the Teensy over the serial port

    on a windows 7 machine i can send data from the app to the Teesnsy 3.2

    on a windows 10 machine it is not possible to send data...
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    Does the slower 16mhz teensy 2.0 use less power ?...

    Does the slower 16mhz teensy 2.0 use less power ?

    What environment are you in ? Can you use a solar panel ?
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    Hi Paul, thank you for the reply you mentioned...

    Hi Paul, thank you for the reply

    you mentioned a buffer chip - is an optoisolator a buffer chip ?
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    Thanks Paul - I will stick with a Teesny 3.2 for...

    Thanks Paul - I will stick with a Teesny 3.2 for this project :)
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    Hi Frank basically I want to protect them...

    Hi Frank

    basically I want to protect them against static and an overvoltage of around 12 to 24 v
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    16bit PWM output on Teensy 2.0

    I looked at the spec of the Teensy 2.0 - it says it can output pwm of 16 bit

    do you need to interfere with the timers to get this to work ?
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