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  1. also, make sure you feel confident about the USB...

    also, make sure you feel confident about the USB hardware on your computer...
    This morning I couldn't connect to / upload code to my teensy and kept returning to software explanations until I simply...
  2. Hey MuShoo, thanks for the reply yeah i...

    Hey MuShoo, thanks for the reply


    yeah i tried something similar where i said if the current value (which is the immediate reading at the A0 minus the first stored position when finger makes...
  3. Can there be negative control values in MIDI?

    Hi - I am using my teensy 3.1 to turn sensor data into MIDI which is sent to my computer over usb and used in MAX MSP. I would like have MAXMSP receive data that is positive in one direction in...
  4. Here is a picture of the scope when my finger is...

    Here is a picture of the scope when my finger is released from the sensor - each grid column is 20 milliseconds.
    Pressing down on the sensor looks the same but opposite direction of course.

    3246
  5. Paul - thanks for the response, and sorry for my...

    Paul - thanks for the response, and sorry for my delay, just getting back to this project now.

    You are completely right - the sensor is sensitive to more than position. I hooked it up to an...
  6. Hey Steve - the Serial.print is only outputting...

    Hey Steve - the Serial.print is only outputting if it detects a large enough change in value, so I don't think it is being blasted. The delay(100) wont work because I need to have immediate sensing...
  7. Teensy 3.1 ADC lag issues. taking 10-20ms to detect immediate changes in voltage.

    I have been trying to get a soft pot (touch strip potentiometer) working with the teensy for a music controller project. https://www.sparkfun.com/products/8680. Here is my circuit.
    3143

    It is...
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    Has anyone had the teesny audio board short...

    Has anyone had the teesny audio board short itself?

    my teensy shut itself off after opening File>Examples>Audio>Analysis>DialTone_Serial --- and also shut down my computer!

    2841

    Any ideas?...
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    ok great - i had version 1.0 stable downloaded ...

    ok great - i had version 1.0 stable downloaded

    however on the teensy3.1 technical specifications page

    https://www.pjrc.com/teensy/teensy31.html#specs

    under the communications table

    it...
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    ADC objects - multiple audio inputs? The Audio...

    ADC objects - multiple audio inputs?

    The Audio System Design Tool allows you to create multiple adc objects. however each of them say to use pin A2 for audio input. Is it possible to have multiple...
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    now that I have 1.0.6 installed and check...

    now that I have 1.0.6 installed and check Arduino>About Arduino i can see clearly that teensyduino 1.20-rc5 is on the about page - beforehand (1.0.5) it didn't mention its existence at all so i...
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    got it to work - i had arduino 1.0.5 installed ...

    got it to work - i had arduino 1.0.5 installed

    the teensyduino 1.20-rc installer says that it work with 1.0.5, but it wouldnt for me...

    once i installed arduino 1.0.6 - i had to reinstall...
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    has anyone checked the teensyduino 1.20-rc5...

    has anyone checked the teensyduino 1.20-rc5 install on a mac yet?
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    i selected arduino.app as the folder and checked...

    i selected arduino.app as the folder and checked 'all' for additional libraries to install
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    yes sorry 1.2 not 2.0 its very odd...I have...

    yes sorry 1.2 not 2.0

    its very odd...I have installed 1.20-rc5

    after it not working for a while i ended up installing it again and still doesnt work
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    Pensive - you are able to compile your arduino...

    Pensive - you are able to compile your arduino sketches by simpling copying the export file from the audio system design tool into a new arduino sketch? do you add a setup() and loop()?
    are you able...
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    Yeah I also tried compiling before I downloaded...

    Yeah I also tried compiling before I downloaded teensy2.0 - didn't work then either
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    Hi - forgive me if this has already been...

    Hi - forgive me if this has already been addressed/isnt the right spot to post...I haven't looked through the entire thread.

    I can't compile my arduino sketches that are generated by audio system...
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    Teensy Audio Board size?

    The audio adapter board looks awesome - excited to try it out. I can't seem to find the dimensions for it on the page though - how big is it?
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    hey guys - is it possible to do variable speed...

    hey guys - is it possible to do variable speed sample playback with this library?
    Thanks
    Zach
  21. Exposed ground line a problem in teensy board bount?

    Hey guys - Im soldering my teensy and two multiplexers onto a board and wanted to make a ground line since there are so many parts of my circuit that get pulled to ground. Im using some 22 gauge...
  22. I have seen this suggested a few times in...

    I have seen this suggested a few times in multiple sources and am confused by it. Don't capacitors only work as a filter where current is flowing in both directions? I understand how they work in the...
  23. great - thanks! did you mean to say to...

    great - thanks!



    did you mean to say to twist the signal wire around the ground wire?
  24. yepyep thanks guys - I'm thinking if I had looked...

    yepyep thanks guys - I'm thinking if I had looked close enough maybe the first 127 numbers of the stream of 0-1023 would have been linear in the MIDI stream, and then crazy after that.

    Mushoo -...
  25. maybe ill just put it directly into pcb board...

    maybe ill just put it directly into pcb board with a .1uf cap and cross fingers
  26. I am using digital ground...what does analog...

    I am using digital ground...what does analog ground mean?(besides that you're supposed to use it for analog...)

    what determines how many bits of resolution I am using? the type of variable I am...
  27. capacitors best option for removing analog sensor noise?

    It seems a lot of people get stuck in a catch 22 with sensor noise such as this - I don't want to solder my components all into a board yet, because I want to make sure I can get it working before I...
  28. usbMIDI read of analog values uncooperative while multimeter read voltages OK

    I am simply trying to read the value of a linear potentiometer with the Teensy 3.1, and convert this to MIDI.

    1576

    here is the code
    _____________________
    int a0 =0;
    void setup(){...
  29. great -thanks!

    great -thanks!
  30. Thread: Dead Link

    by zalterman
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    boom drjohn

    boom drjohn
  31. Thread: Dead Link

    by zalterman
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    1,578

    Dead Link

    the link to Philip Cunningham's MIDI Controller

    on the USB MIDI page
    http://www.pjrc.com/teensy/td_midi.html

    seems he deleted this page

    -Zach
  32. I am confused by the use of Vee for this pin. Why...

    I am confused by the use of Vee for this pin. Why is there a negative voltage with DC electronics? (i dont have EE training)
    and what is the channel on resistance? is this the resistance between the...
  33. PROBLEM SOLVED for some reason, when running...

    PROBLEM SOLVED

    for some reason, when running off of 3.3V instead of 5V, the multiplexer needs 100microseconds of delay time between addressing and reading the input of the common pin.

    Can...
  34. the multiplexer is not exactly '74HC4051' it is...

    the multiplexer is not exactly '74HC4051'
    it is
    http://www.mouser.com/ProductDetail/Texas-Instruments/CD4051BE/?qs=q2XTDbzbm6DxulBsMcV7tA%3D%3D

    but this still says operating voltage minimum...
  35. hmmm - when i switch the power rail from the 5V...

    hmmm - when i switch the power rail from the 5V to the 3.3V (and not changing anything else) it no longer works - pressing down the buttons doesn't pull the common pin to ground...cant seem to figure...
  36. PROBLEM SOLVED. i was using the internal pullup...

    PROBLEM SOLVED. i was using the internal pullup resistor of the teensy for the common in/out pin, but I was powering the multiplexer with the VUSB 5v from the teensy. I stupidly didn't realize until...
  37. Per my last comment - I tested with arduino...

    Per my last comment - I tested with arduino instead of teensy 3.1 and still am not seeing connection between common pin and input on the 4051 with my multimeter (even though the multiplexer is...
  38. What I'm not quite understanding is that when I...

    What I'm not quite understanding is that when I use use my multimeter to check connection between the common out/in pin and the selected input channel, I am not finding connection.
    I have a sketch...
  39. yep 4.94 volts I'm getting power from the VUSB...

    yep 4.94 volts

    I'm getting power from the VUSB pin

    1562

    this isnt apparent in my previous photo because my pin header is displaced at that row- you just cant see
  40. 4051 multiplexer not working correctly with teensy 3.1, but works with arduino

    Hello everyone

    I am trying to get 16 buttons into my teensy 3.1 with as little pins as possible. I have been using the 4051 multiplexer
    ...
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    here is a picture of a prototype of the drum...

    here is a picture of a prototype of the drum mount

    this is with a 25pin connector going 6 feet to a breakout board - breadboard with pulldowns and some capacitors, into arduino, into computer. ...
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    won't the resistors create a voltage drop and...

    won't the resistors create a voltage drop and conflict with the voltage expecations of the teensy RX pins?
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    this will probably not work, as the circuitry is...

    this will probably not work, as the circuitry is embedded within a drum kit with a lot of physical motion - my legs will often go through the line of sight of infared, and the board with sensors/data...
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    pictographer - I need imperceivable latency with...

    pictographer - I need imperceivable latency with the data (it is for music controllers that need to be rhythmically precise). Doesn't IR usually have at least a .25 second lag? I know my TV remotes I...
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    Hey Paul -thanks for your detailed response. I...

    Hey Paul -thanks for your detailed response. I will connect the Vin of my PIC to the VUSB of the teensy to get the 5v. Will ground differences still be a problem if I connect the ground of my PIC to...
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    Thanks for the reply - yeah I figured there is 5V...

    Thanks for the reply - yeah I figured there is 5V somewhere on the teensy - I just cant figure out if there is actually a pin out for it. The pin diagrams indicate it doesnt exist.

    Ha good...
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    teensy 3.1 5V output?

    It seems as though the teensy cannot output 5v - I am correct about this or is there a work around?
    I was planning on using my teensy to power/receive data from a PIC16F873 microcontroller about 6...
  48. Teensy receiving serial data from PIC16F873 microcontroller - how to unpack?

    Hey guys - I'm new to the teensy platform, but so far am finding it more efficient and understandable than other microcontroller packages I've used - and this community seems awesome! Excited to dig...
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    sorry - "I will just keep 'it' in there..." was...

    sorry - "I will just keep 'it' in there..." was in reference to usbMIDI.read()
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    yeah I will just keep it in there for now and...

    yeah I will just keep it in there for now and maybe its role will become more clear with time.

    I tried compiling the code as is and it wouldn't, and then after clearing that bracket - it did. The...
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