Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: Andy Belov

Search: Search took 0.00 seconds.

  1. From diagram, to PCB, to plastic case

    I'm ready to make my new awesome electronic instrument.
    I need to design a PCB, make a 3D model of it and design a plastic case for the PCB.

    I tried KiCAD and rejected it because it doesn't move...
  2. Replies
    23
    Views
    239

    @KurtE, thanks for such a detailed response....

    @KurtE, thanks for such a detailed response.
    These are pretty expansive, indeed. I'm sure eBay will come to the rescue.

    Also, I posted this question about CAP1188 on Adafruit forum:...
  3. Thanks so much. This is what I was looking for....

    Thanks so much. This is what I was looking for. I'll try that, as I am in possession of a good analog oscilloscope.
    But the screen and the sensors "sound" differently, so I may need 2 filters.
  4. Replies
    23
    Views
    239

    Thanks, Michael. This is as affordable as it...

    Thanks, Michael.
    This is as affordable as it gets: $29 for each.
    I still hope for the other people to do the tedious work for me (he-he).

    Maybe I need to start looking for an alternative to...
  5. Adding guitar preamp to the line input

    I have added a guitar input to the Audio Board (rev. D). It's based on TS922 op amp.
    I put a capacitor on the preamp output, 10uF was all I had, just before connecting it to the Line In of the Audio...
  6. Replies
    23
    Views
    239

    Wow, that's advanced. I need to start learning...

    Wow, that's advanced. I need to start learning about all this Logic Analyzer thingy. Which one do you use? Hope it's not too expansive.

    My guess is that Teensy 4.0 is so much fast than anything...
  7. Replies
    23
    Views
    239

    Thanks, Kurt. I have no idea how you figured...

    Thanks, Kurt.

    I have no idea how you figured it out, but that was the first half of the solution.
    Addind the "delay(1);" in readRegister fixes the reading.

    What I also found that it fixes the...
  8. Just got the TS922 today:...

    Just got the TS922 today: http://www.digikey.com/products/en?keywords=497-6035-1
    Did my usual "wire mounted device" technique:
    17919

    It is much more quiet than the LM358 and I think it just...
  9. Ok. That concludes my research here. I didn't...

    Ok. That concludes my research here. I didn't know about the high latency of A2DP. I guess it's good for playing musing, but not for something requiring latency below 10 msec.
    I'm not giving up on...
  10. Had no idea about this. Good to know. All I'm...

    Had no idea about this. Good to know. All I'm looking for is to save time digging around how to connect all this. I'm going to try it all anyway and see if it's good enough for an amature guitar...
  11. Thanks, Chip. Very valuable information. I think...

    Thanks, Chip. Very valuable information. I think I'll do just that and add yet another simple bluetooth just for talking to the phone.
  12. This is exactly what I need. I'm making a guitar...

    This is exactly what I need. I'm making a guitar "pedal" and want it to work as a wireless guitar transmitter, so that you can run around like young Eddie Van Halen. I'll use the Audio Board line out...
  13. Replies
    23
    Views
    239

    Thanks, Paul and Kurt. Appreciate all the help.

    Thanks, Paul and Kurt. Appreciate all the help.
  14. Need bluetooth for sound streaming and data transfer

    I have this crazy idea of having a bluetooth module connected to Teensy 4.0, which can stream sound from the Audio Board to bluetooth headphones or a sound system, and at the same time be connected...
  15. Replies
    23
    Views
    239

    1 or 3, same thing.

    1 or 3, same thing.
  16. Replies
    23
    Views
    239

    Tried to change the "if" like below. Still see...

    Tried to change the "if" like below. Still see the "?????" in the monitor. Don't understand how it can print "0x1" and fail to compare to it.
    Anyway, I commented the "if" out and can see the...
  17. Replies
    23
    Views
    239

    Forgot to mention. It's Teensy 4.0 Love it. Want...

    Forgot to mention. It's Teensy 4.0
    Love it. Want to stuff it with everything I can.
  18. Replies
    23
    Views
    239

    Yesterday I downloaded the latest of everything....

    Yesterday I downloaded the latest of everything.
    Checking now.
    Adduino help says Adruino 1.8.10 and Teensyduino 1.48
    The Adafruit library I downloaded today.
  19. Replies
    23
    Views
    239

    Sorry, forgot the connections and the monitor...

    Sorry, forgot the connections and the monitor output.
    I just thought that the fact that the I2C scanner finds all boards proves that the connections are good.
    I use I2C on pins 18 and 19.

    Here...
  20. Replies
    23
    Views
    239

    Just got 3 of these:...

    Just got 3 of these: https://learn.adafruit.com/adafruit-cap1188-breakout/wiring
    Put them on the breadboard, ran I2C scanner and says that it found all 3, but the Adafruit example says "CAP1188 not...
  21. Got a MIDI keyboard working with Teensy 4.0

    I'm absolutely astonished! It all worked the first time.
    For the first time in my life I soldered an SMD chip with hot air gun:...
  22. Found it: C:\Program Files...

    Found it:
    C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\USBHost_t36\examples\Serial\MIDI\InputFunctions

    I just got the connector and the current limiter. Will try it this weekend....
  23. Teensy 4.0: need an example of using USB host

    I want to connect a MIDI keyboard to the USB host on Teensy 4.
    Just can' t find any examples of reading from it.

    If anybody has an example of reading data from the USB Host (D+/D-) port on Teensy...
  24. Appreciate the advice. I'm new to guitar preamps...

    Appreciate the advice. I'm new to guitar preamps and just followed SparkFun's proto pedal diagram.
    I'll try that.

    And I just found out that MPR121 (12 capacitive sensors in one chip) is no longer...
  25. For the amp, you need to find what you need. I...

    For the amp, you need to find what you need. I used a very small one, to fit my instrument. For the accordion you need something loud, just mind the battery drain for it.

    For the headphones you...
  26. The charger is integrated. It charges from the...

    The charger is integrated. It charges from the USB, just like your phone.
    The only thing I added is a 3 contact switch. In the Off position, it connects USB power to the VIN, as it did before you...
  27. Here is the charger I use with Teensy 3.6 and...

    Here is the charger I use with Teensy 3.6 and 4.0: https://www.adafruit.com/product/2124
    Battery I use: https://www.adafruit.com/product/2011
    I make something a little similar: QuantoGraph.com
    ...
  28. Replies
    23
    Views
    239

    Did anybody use CAP1188?

    I just found out that MPR121 (12 capacitive sensors in one chip) is no longer made and has been replaces with CAP1188 (same thing, only 8 sensors).
    Did anybody try it yet with Teensy?

    I'm going...
  29. Replies
    1
    Views
    66

    Hi Rob, Yes the documentation is never on the...

    Hi Rob,

    Yes the documentation is never on the top of the list of any good programmers. They just make things awesome and superfast.

    For speed, the text is drawn without touching the background,...
  30. I see what you mean, Derek, but my guitar buffer...

    I see what you mean, Derek, but my guitar buffer (LM358) is powered by the same Teensy.
    Everything is on the same board, powered by the same battery, connected to the same ground.
    The guitar...
  31. Buzzing noise with audio line input from cap sensors

    I have 3 Adafruit_MPR121 capacitive sensors and a touch screen with my Teensy 4.0.
    When I touch or release the screen or the sensors, I hear a pretty loud buzzing sound from the Audio Board, but...
  32. I got it working, both the Audio Board and the...

    I got it working, both the Audio Board and the screen, but only as long as I keep the SD card out of the Audio Board.
    As soon as I just stick the SD card back into the slot, the screen doesn't show...
  33. Hi Derek, Good to know that I'm not alone in...

    Hi Derek,
    Good to know that I'm not alone in this. I'm making a compact (big pocket size) musical instrument which needs a screen, the Audio Board, about 30 capacitive sensors, bluetooth with A2DP,...
  34. Sorry, forgot to ask what SD card reader will fit...

    Sorry, forgot to ask what SD card reader will fit on Teensy 4.0 (bottom side) ? I've never done it and they all look so different.
    Can somebody point out one for me on Amazon, preferably?
    Thanks...
  35. Teensy 4.0 with Audio Board and ILI9341 screen wiring

    Did somebody already wire the ILI9341 screen to Teensy 4.0 stacked with the new Audio Board? Ideally, without using the bottom connectors.
    Just trying to save myself some time figuring it out....
  36. Thanks for sharing, Bill. What a dramatic...

    Thanks for sharing, Bill.
    What a dramatic difference!
    I guess I'll design my board for soldering Teensy 4 so that I can use both the USB host port and the on-board SD reader.
    Looks like it was...
  37. Appreciate the response, Michael. I guess the...

    Appreciate the response, Michael.
    I guess the short answer is "4 times faster", but "paint in the neck, if you can't afford the breakout board due to size constraints and need the host USB".

    I...
  38. SD card speed on Teensy 4.0 vs. Audio Board

    Is there a difference in read/write speed of SD card between the one soldered directly onto Teensy 4.0 vs. one on the new Audio Board?
    I'd like to use the one on Teensy 4.0, but I also need the USB...
  39. Thank you, Paul. It worked. Here is what I did:...

    Thank you, Paul. It worked. Here is what I did: 17428
    Here is a video about it: https://www.youtube.com/watch?v=mB_wPn7nOT8&feature=youtu.be
    If anybody needs to do the same, watch the video and see...
  40. Breakout Board for Teensy 4.0 and Audio Shield - not working

    Just got my Breakout Board for Teensy 4.0, soldered just the Teensy and the audio board in - no sound. The audio board works fine with Teensy 3.6, but when I put it into the new board, there is only...
  41. Replies
    71
    Views
    5,033

    I fixed that by wrapping all wires between Teensy...

    I fixed that by wrapping all wires between Teensy 3.6 and the audio shield in copper foil. Then I soldered the foil to Teensy's ground. Didn't try it with Teensy 4.0
    Today I'm getting the breakout...
  42. Thank you for your kind words, EddieLeo. The idea...

    Thank you for your kind words, EddieLeo. The idea is to make a smart musical instrument which you can play and use for music learning.

    One feature would be an "electronic music teacher", which...
  43. Take a look at my Voice to MIDI (pitch recognition) work in progress

    Here: http://www.youtube.com/watch?v=lTb-eU1CPKY&feature=youtu.be

    It kind of works, but still needs improvements. The pitch recognition is fast and about 95% accurate for now. I think I need to...
  44. Replies
    2
    Views
    189

    Thanks, man. I'm going to put more details on my...

    Thanks, man. I'm going to put more details on my website. The library is simple and functional, too. I'm going to expand it to make much more interesting. Just wanted to see if there is any interest...
  45. Replies
    2
    Views
    189

    New prototype of my musical instrument

    Check it out: http://QuantoGraph.com
    Teensy 3.6, 18 touch sensors, MIDI synthesizer, Bluetooth.
    The Arduino code is there, too.
  46. Replies
    1
    Views
    215

    Electronic Musical Instrument

    Hello, everybody. Just wanted do share my first prototype of an electronic musical instrument based on Teensy 3.6
    It has touch sensors, MIDI synthesizer and a touch screen. It imitates saxophone,...
Results 1 to 46 of 47