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@Michael: He is probably just preparing a Teensy 3C in multiple colours with a plastic case.

Is it possible to power up a computer with the teensy? There are keyboards that have a "wakeup" button, probably other devices (modems?) might wake up via USB too. Of course WOL works most of the time, but sometimes waking up via USB would be preferable (especially because the teensy does not...

Teensy vs. udev rules vs. modemmanager I just checked, with the "right" udev rules no problem, even with modemmanager running.

Thanks Paul, that helped a lot. When I inserted a debug print statement I saw writing activity to the port. It was the Gnome modemmanager, I think, that I had removed before but must have been come back in an upgrade. Removing it makes the serial port work again- Thanks for your help, and...

Thanks, Pete. Hangs somewhere between 3 and 7 reproducibly in several runs. Maybe my board is broken?

Serial hangs for me Don't know if this is related to 1.17RC1, but the following sketch hangs on the serial port while it continues to run (blink). Teensy 3 int led = 13; void setup() { pinMode(led, OUTPUT); Serial.begin(9600); } void loop() { digitalWrite(led...

I think this upgrade fixed my Teensy 3 serial problems upon reboot! Thanks, Paul!

Sorry for the noise: Solved it with using sprintf(), and %f format strings, and the code is easier to read too.

I wanted to ask the same thing: I have to convert a float into a string to calculate a checksum before sending it over the line, and dtostrf() works on Teensy 2, but not Teensy 3. What is the best way to convert a float to a string on a Teensy 3?

It is no problem to get phone chargers or other "wall warts" that have specs like 700mA/5V, which is of course enough for Teensy. It is oversized by one order of magnitude for most projects, though, as a Teensy would probably be fine with 70mA most of the time. Now I understand that we are not...

Is this board 5V tolerant? I think there a several BMP85 boards that are limited to 3.3V And: There are several broken examples for the BMP085 floating around, I had lots and lots of trouble until I found a working sketch.

I think the most important question is: Does the Teensy 3 show up as a serial port (are they still COM1, COM2 ... in Win8?) in Windows? BTW the Micro-USB connector might look unpractical compared to Mini to you now, but as it is standard for phones (except Apple) now, do expect stuff to move...

I've connected some sensors to a few Teensies, and while it works fine, I want to have one additional layer of plausibility checking by introducing a checksum. What I've got now looks like 23.0 57.6 1024.0 784 on a line-by line basis. What I want is to have a checksum per line 23.0 57.6...

As Michael said, it is not completely clear what exactly you want to archieve. But if I understand you right, this is very easy. You can connect e.g. a Teensy 2 with a simple USB cable to a router (I sucessfully use the Asus WL-330n3g for this, I had lots of problems with the cheaper TP-Link...

Can it be that I am seeing something similar with the serial port? When rebooting the host, my Teensy 3's serial port hangs, unplugging/replugging fixes ist, and it works fine once plugged in again.

@Constantin: In fact, I have ordered a similar relay board, but if possible I want to get my own relay setup working, because a lot of work went into building the enclosure, cabling AC, etc. @jsfetzik: Can you explain the diode? I assume the cap is across the coil and/or supply power. I do...

I am struggling with driving two relays from a Teensy 2 right now. It works sometimes, most often it hangs after a few minutes to a few hours. The hardware side: 2 relays driven through BC547 transistors, with a base resistor of 670 Ohms each, and a diode across the coil just like this diagram...

I want to hook up both a Teensy 2 and a Teensy 3 (doing different things) to a TP-Link MR3020 router's USB connector (running OpenWRT Linux and via a hub). Both will be used via ser2net over the network. But how do I ensure I get the right device at the right port? Is there a way to ensure that...

On the topic of off the shelf relay products: What I always wondered was: Why does none of the vendors in the Arduino/Teensy/Raspberry Pi-universe (like Adafruit, Sparkfun ..) make a small box that safely encloses all the high voltage mains stuff, and that can be driven from an output directly...

Thanks! I have built a curcuit like the one above once, but I wondered if shortcuts were possible with that small a relay. Guess I better be safe.

I want to drive a small Omron G6C relay, that lists in technical data 40mA drive current, 125 Ohms coil resistance at 5V. Can I drive it directly from a Teensy 2 digital output or will I need a transistor? I assume if I need a transistor, I can use the USB power from the teensy to drive the...

My Raspi and my Teensy 2 work just fine together. Do you see a /dev/ttyACM0 (or ACM1 or whatever) device on the Raspi? What is added to dmesg when you plug in your Teensy? What does "lsusb" say on the Raspi? Did you set the USB type to serial on Teensy?

Thanks, Paul&JP3141! The Teensy 3 is truely wonderful in its versatility.

I want to connect my Teensy 3 to the serial port of a TP-Link MR-3020 router. This serial port gives me 3.3 V of power. Would that be enough for the teensy 3 if I do not need USB while the Teensy is connected to the router? Or should I try to tap 5V somewhere on the router (which is also...

I like the Asus WL330n3g http://www.asus.com/Networks/Wireless_Routers/WL330N3G/ about EUR 35, 2A microUSB power supply and cable included, very small, USB and runs OpenWRT fine. About the most compact router to abuse as a Teensy/Arduino WLAN/LAN adapter.

Is it possible to change the string that Teensy 3 registers on the USB bus? And: Would that break Windows .INF files? TIA /ralph

Thanks, Michael! Installing libc6-dev-i386 and dependencies solved my problem.

Thanks, Michael! Installing libc6-dev-i386 and dependencies solved my problem.

Thanks, Nantonos! I should have written that I am using the download supposedly for 64bit: md5sum arduino-1.0.2-teensy3-beta9-linux64.tar.gz 644c724a49d6f7bd06386feca68631f9 arduino-1.0.2-teensy3-beta9-linux64.tar.gz

Teensy 2 works flawlessly for me. But I've got a problem with the beta9 for Teensy 3 on my 64bit Ubuntu box When I compile I always get: Cannot run program "/home/ralph/arduino-1.0.2/hardware/tools/arm-none-eabi/bin/arm-none-eabi-g++": error=2, no such file or directory. The strange thing is...

Thanks, Paul! I've been playing for a few hours with it now, and I am having a lot of fun!

The description of Teensyduino lists it compatible with Arduino 1.0.1. Is this because that was the most recent version when it was last updated, and should it be compatible with 1.0.2. or should I stay with 1.0.1 for now? TIA Ralph

Fimo polymer clay is hardened by baking it for 30 minutes at 110 degrees Celsius (230 F) in the oven. Do you think a teensy would survive being "baked in" at that temperature?

I've just ordered a Teensy 2.0 and a 3.0. I think the Teensy 2.0 would be cool for very small and simple projects, that e.g. just need a few LEDs or small components and mainly communicate over USB. Would it be possible to sacrifice a few of the digital pins by cutting the board traces and...