3.2 (with Pins)

Very fast, has many popular libraries for driving displays using adafruit libs, code is very compatible with Arduino--some small discrepancies here and there, but nothing i couldn't find a comparable solution. You can use Arduino IDE to program--just download a free plug in. This unit is a 3.3v but is 5v tolerant on the inputs. Some cool featuresyou can write to the analog ports (sin wave generator)analogread can be configured for 12 bit resolutionanalogread can be configured to automatically average x sampleshas several serial ports (and you can use 0 and 1)very very very fast (overclock to 120 mhz)has built in RTC you need to solder on a crystal and backup batteryTouch read pins(i've not tried these yet)analog can be used as digital inputs (10 analog, 24 digital--more if you solder pins on bottom)very very very fast (overclock to 120 mhz)Very good forum supportI have 2 and will buy more

Not only is it fast, but it has USB/HID built into it. That lets you use it as a game controller.Got a favorite joystick that's stopped working? Replace the old controller board with a Teensy 3.2 board. This board can give you all this & more;• 32 Buttons• 6 Axis (X, Y, Z, Rotate Z, Left Slider, Right Slider)• 1 Hat SwitchThere's even a usable sample code that lets you use the Teensy as a joystick controler - pjrc.com/teensy/td_joystick.html.There are reasons to buy this with, and without the pins attached.If you're new to Arduinos, the attached pins make it easy to use with a breadboard. Also, you won't save all that much money if you buy one without the pins attached.On the other hand, if you know what you're doing, the board without the pins may be easier to build into a project.

A huge upgrade from the ancient Atmega328p processor chips I'd been using in my projects. Far faster, more I/Os, more HW UARTs... and this module really doesn't take up much more PCB space than the old 328p chip in the DIP package itself.It integrated seamlessly into the Arduino IDE and only minor code changes to SW were required.

I bought this to build a custom PC controller. The Teensy is great for that sort of thing, and I am very excited to see what other projects this controller can be used for. I will definitely buy it again!

1. USB header fell off with relatively minor stress. I have other boards like the Huzzah Feather and have had no problems. I ordered another, but without pins because I decided I wanted to be able to stack.2. The board card does not use standard SPI pin designators, so you have to infer which is MISO/MOSI3. After being spoiled by places like Adafruit, I found the PJRC website documentation to be disappointing.On the plus side.1 Integration into Arduino IDE was easy2. Fast board. DAC is a nice feature3. Gold plated PCB is a nice touch.

For its size and power, this is the best microcontroller currently out there in my opinion. The developer community is strong and PJRC is really devoted to supporting this device. The only thing I wish this had was a DSP chunk on the ARM since this series does have that as an option. I'm sure the decision not to do it was done for a reason, but it would have been cool to have it.Nevertheless, an amazingly great microcontroller. My go-to when building things.

This one offers 16 bit analog inputs and a 12 bit analog output. That sets it apart from most of the arduino type controller boards. The software support and community are fantastic.

have gone through several of these (mainly because of user error) IE knocked so hard the USB came off the endthey are great though