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    What would cause the Teensy audio shield to go silent after power cycle?

    How can I check for that? I am using the hex file for m8 headless. Is there a voltage I can read on the pins, to verify if everything is fine? If I flash the Teensy first with the audio demo, and then put the hex file for M8 headless it works; but if I power cycle the Teensy then there is no...
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    What would cause the Teensy audio shield to go silent after power cycle?

    Troubleshooting what happens when I power cycle the teensy 4.1 running M8 headless. I basically lose audio output as I power cycle the board. I hear no audio at all unless I re-flash the board. Then once I power cycle it again the audio does not output anymore from the Teensy audio shield. I...
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    New Teensy 4.1 DIY Synthesizer

    Really amazing; and thanks for making this an open project. I think you should have a paypal or something like that because this project deserve donations for sure
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    Anyone tried to use the Teensy audio board with M8 tracker headless?

    So interesting enough, I found that it seems that something shut down the audio signal once you set the firmware once. I had audio working fine with the audio board and the demo sketches from Arduino IDE; and it worked when I flashed M8 tracker on the board; but once you power it down and power...
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    Anyone tried to use the Teensy audio board with M8 tracker headless?

    I am experimenting with M8 Tracker headless, and I started to use it on Windows, before moving to a RPI as host for the UI. Problem is, I hear no audio. I connected a Teensy audio board, and it seems to emit a pitch when I play sounds from the internal synth engines, but nothing more than that...
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    Teensy 4.1 as midi sequencer?

    For some reasons I can't see the replies I got via mail, but thanks for suggesting Vimana and Microdexed! They both seem quite advanced and solid; not sure if I have the right skillset to take those projects and simplify them for my needs, but it is a great starting point. I actually like the...
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    Teensy 4.1 as midi sequencer?

    Guess there is no interest in such usage for the Teensy? Still searching for something to use as starting point but I guess I can start getting a simple UI running with micropython maybe. That should be simple enough to start prototyping.
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    Which os could I run on Teensy 4.1 that give me a CLI that can run simple sw?

    Thanks, will take a look at RunCPM and will check the project blog. It does not need to be necessarily like DOS btw; I wish there was a simplified Linux terminal OS of some sort, that would basically act like if it was linux but without the whole OS on top of it
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    Which os could I run on Teensy 4.1 that give me a CLI that can run simple sw?

    Been looking at RTOS; but those are a waste of resource for my user case since I just want a simple CLI based OS I can run on the Teensy. Something similar to what used to run on old computers like the Amstrad CPC or the C64 and so on. My ideal would be something like DOS 6 or CP/M. The Teensy...
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    Teensy 4.1 as midi sequencer?

    I was finally able to find a Teensy 4.1 and after looking at the existing projects I was curious if anyone tried this. I saw some synth projects based on the Teensy, although I am not interested in it producing sounds only, but more interested in how could I use it as companion for a synth that...
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    teensy as trackball/spinner device?

    Hi, I want to build a trackball + spinner panel for one of my simulator games. I thought since I have a teensy lying around I could use that and make my own controller. Both the trackball and the spinner use I2C, so I have the usual 4 cables with data, clock, VCC and ground. I should be able...
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    How do you use the Joystick class to setup a HID joystick?

    Awesome, thanks for the link! I can see now that the variables for the axis are just X, Y and Z. While I learn about making my own joystick device; I just set constant value for all the analog axis to be half of 1023; so they stay centered no matter what; while the hat is set to -1, which I...
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    How do you use the Joystick class to setup a HID joystick?

    Also where do I get the existing settings for the Joystick class? As now I only know Joystick.button(); but nothing more. Thanks and merry Christmas!
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    How do you use the Joystick class to setup a HID joystick?

    I see; Thanks KurtE for the pointer. So you don't just change settings using the IDE via the library, but you need to write a descriptor to identify the joystick from the ground up, and the code with the implementation. I did come up with this; after searching on the forum and grabbing most of...
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    How do you use the Joystick class to setup a HID joystick?

    I am using the joystick library included in Teensy, since the one from Arduino does not work on the Teensy. Although I can't find API usage and documentation, and I am stuck now. When I connect the Teensy 3.1; Windows 10 see it as a 32 buttons joystick with HAT , Zaxis, Zrotation and 2...
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    keypad library: how to differentiate between momentary switch and toggle switch

    Thanks Paul; I do get a picture of the situation now. Will give a try with the diode and see how it goes. BTW, is there a way to remember the state of a keypad button pressed? In this way I can check 2 states and if it goes through pressed and hold, I know it is a toggle. While looping through...
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    keypad library: how to differentiate between momentary switch and toggle switch

    Hi, I just started to use the keypad library; and I am able to get signals from various controls. I am looking at the state changes to handle the signal accordingly. At the moment I have a momentary button and a toggle switch; and I am not able to figure out how to get the difference between...
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    matrix of pins to increase inputs

    Sorry, I am aware of how it works here; I just didn't post the wiring since I thought that the matrix above was clear enough. I did try with the keypad library, and it does work like a charm! Thanks @KurtE for the suggestion!
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    matrix of pins to increase inputs

    Hi, I am working on my controller with Teensy 3.1, and I am using a matrix to add more inputs than the available digital IO available. 2 - 3 - 4 - 5 - 6 ------------------------ 7 X ------------------------ 8 X ------------------------ 9...
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    Help for joystick/keyboard setup

    Hi, I am making a simple controller that uses buttons and switches, so I can use it as game controller for my kids. I am having a lots of issues with the configuration. I did find an example on instructables to start, since it was using a Teensy (I have a 3.1 version). So far,I was able to...
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    Teensyduino 1.25 Beta #1 Available

    Not sure if it is a new behavior of the application or some W10 problem, but the Teensy won't reboot spontaneously when I upload. The loader appear and say to push the reset button, which I remember I never had to do. but pushing the button has no effect whatsoever, and the IDE fail to upload...
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    Bluetooth module and Teensy 3.1

    Thanks for the hint, Mike! I did not run yet some data consistency test, to find out which is the limit; so I want to play safe, and most of the articles online suggest to use values that does not go higher than 40k baud. Since this is UART, I am not aware of how do you actually check for...
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    Teensy 3.1 with CD74HC4067: I2C usage

    Thanks for the explanation; my understanding was that the line with data and the power line has to be separated, since there is already current going on the data line, and if you put power from VCC, the signal would basically be covered (This may be incorrect; my understanding about how power...
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    Teensy 3.1 battery powered: correct pin used?

    I see :) I wish I knew about it before buy these. I will keep this in mind for my next project!
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    Teensy 3.1 battery powered: correct pin used?

    Much appreciated Paul and Constantin; I have cut the pads apart and wired gnd to gnd of the battery and VIN to the positive of the battery, and it works fine. while using the charger, I am connecting 5V from the charger to VUSB on the back of the Teensy; GND to GND (the one close to pin1), and...
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    Teensy 3.1 and HC-05 : bi-directional com with other device and AT commands?

    Embarrassing; the issue was not with the code but with the serial monitor. On arduino IDE, I was not setting the monitor as "Both NL & CR"; now with just 4 lines of code I can send commands to the device and get back the responses. The only curious thing is that I get multiple answers when I...
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    Teensy 3.1 and HC-05 : bi-directional com with other device and AT commands?

    Finally got my computer back; so I am starting again to work on these :) I was successful in talking to the device, turning on and off LED from my computer/droid device. Now I am on the AT commands part. I was reading this tutorial...
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    Teensy 3.1 battery powered: correct pin used?

    I have purchased a battery charger from Adafruit, to recharge the battery; and I would like to use it in my project. The item is this one: https://www.adafruit.com/products/1905 The idea would be to have the Teensy connected to this charger; so when the usb is connected the battery gets...
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    Teensy 3.1 with CD74HC4067: I2C usage

    I see; so the resistor is needed anyway. I read somewhere that the Teensy has pulp resistor but probably it was something else. forgot that the clock is common, so it makes sense that it has only one resistor :) By "crossing VIN" I mean that the connection coming from SDA of IMU2 is connected...
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    Teensy 3.1 with CD74HC4067: I2C usage

    I see, Thanks!!! My understanding of this IC was totally incorrect; I saw some examples of it used with analog items, like pots; so it was making no sense with a setup with I2C. Questions: Do I need the resistor for the Teensy, or they are only needed for the Arduino? From your comment I...
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    Books specifically for Teensy IC?

    True, but there are differences in how you address issues thou. You all know better than me, that to learn things takes months maybe, but it is not enough to read a book to consider yourself "an expert" or even "knowledgeable"; it is the practice that makes a person that study books, an expert...
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    Books specifically for Teensy IC?

    I see; I have no idea that it was something like that... you can tell that I am new I am familiar with Xcode, but I don't really like it much...I use more often Visual Studio, and if I can, I prefer an old PC software called Dev-Cpp. I wrote countless function on that little editor, and I like...
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    Books specifically for Teensy IC?

    I would gladly participate :) Since I know very little, would be a great chance to learn something too while I work on the wiki :) Honestly I bought a teensy after learning about arduino....it looks too big to me, and also has limited number of IO; so when I discovered the teensy I told myself...
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    Teensy 3.1 with CD74HC4067: I2C usage

    Hi all; I am experimenting with this chip: CD74HC4067 I would like to connect via I2C, various sensor that are all using the same address (MPU-6050). Altho now I am stuck at how to connect them. I have the common line for power and gnd, which goes to the CD74HC4067 and then to each of the...
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    Books specifically for Teensy IC?

    Thanks to both of you. Much appreciated for the resources; I know some, but others are totally new to me. With programming, they usually have books that start with theory and go trough various useful and real-life scenario, so you end up with a piece of software that does in fact something...
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    Bluetooth module and Teensy 3.1

    The problem is not the UART transmission, but the Serial+Bluetooth. That page refer to the Teensy, not the HC-05 If the module is not rated for such speed, you are introducing the chance to loose data, because the transmitter can't do its job. I will try to push it to the max limit and report...
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    Books specifically for Teensy IC?

    Fair enough; your remarks are all legit and logic. Thanks for your reply. Overall any project makes me think "how do I do that", but not because I don't know how to load a sketch or put together a circuit that I see on a diagram, but because I do not understand what is going on, besides that...
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    Teensy 3.1 and HC-05 : bi-directional com with other device and AT commands?

    I see; so that pin high or low, dictate if the device accept AT commands or not? In that case I can just grab the 3.3v output on pin 3, until I am done sending the commands. Thanks again Michael!
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    Bluetooth module and Teensy 3.1

    So you are not limited to 9600? My HC-05 chip is specifying to use 9600, or there could be incorrect transmission of data. I didn't experiment much on the subject honestly, since so far, 9600 is fine for me.
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    Books specifically for Teensy IC?

    I have found nothing so far; only the data sheet on this site and the tutorials here. There are plenty of books for Arduino, but Teensy != Arduino, so I do't want to waste time reading a book that is only related to the Teensy. What would you suggest to learn about Teensy 3.1? I did the...
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    Streaming Data to Analog Modular Synth [teensy 3.1]

    BTW is Bluetooth enough for your bandwidth? Sounds like something that you could do with Wifi instead. Keep in mind that the cheap BT modules, like the one that I have purchased (marked as HC-05/06), has max bandwidth of 9600. You can go higher but the doc that I found online specify to use that...
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    Bluetooth module and Teensy 3.1

    Thanks; in this way we don't mix up the posts. It sounds really interesting what you are planning to do.
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    Bluetooth module and Teensy 3.1

    I believe that this deserve a new post; instead of highjack this one ;)
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    Teensy 3.1 and HC-05 : bi-directional com with other device and AT commands?

    Thanks a lot! I will give this a try tomorrow. I do not have any device that run on android with Bluetooth; I will try with either my windows tablet or via console on my macbook. I just need to figure out how to send AT commands now, I suspect that I need to use one serial port to send...
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    Teensy 3.1 and HC-05 : bi-directional com with other device and AT commands?

    GAH, that would explain why I get communication only trough USB.. I am using Arduino code, which is talking to the USB (Serial) port...obvious that it won't respond on anything else beyond that. So I need to change the code so Serial1 is invoked, instead than Serial, and this will address pin 0...
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    Teensy 3.1 and HC-05 : bi-directional com with other device and AT commands?

    So, after trying various solutions, I ordered few of these cheap hc-05. I hooked up the transmitter to the Teensy in this way: Teensy - HC05 3.3V out -> Vin GND -> GND RX1 -> TX TX1 -> RX This is the code that I use: char INBYTE; int LED = 22; //...
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    New Teensyduino won't install on Mac

    Correct Paul, downloaded again, and tried with the beta Arduino; no luck whatsoever. But this one works with the 1.0.5. I had as latest Teensyduino, the 1.19; while this one (1.20-rc5) works. Thanks a lot!!!
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    New Teensyduino won't install on Mac

    So, I had the brilliant idea to download the latest Arduino app, and then latest Teensyduino. Instead of save a backup, I just did an overwrite; like I always do; but this time I was royally burned :) Basically, neither version that is on the Arduino site of the app, is recognized by...
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    Teensy 3.1 and MPU-9150 (GY-9150 breakout board)

    Thanks for the hints; could you suggest how to proceed to actually have someone to design and make custom boards? Does it cost a lot? I don't have neither the skill nor the knowledge to make them at home...saw some videos about making traces using acid, but I don't feel like that's feasible for...
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    Burned the onboard LED; which pin is that LED attached to?

    Thanks, I check the schematics but have little experience on schematics... Thanks Paul; so the pin is the 13 then. It basically matters not if I use 13 or any other, right? I thought that the LED was used for something internal, reserved. Still learning ;) I use often the serial technique...
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