PJRC Teensy 4.1 ARM Cortex-M7 Processor at 600MHz with a NXP iMXRT1062 (Without pins)

Excellent microprocessor. Way faster than Arduino and more features, with plenty of example code to use for your project.

It got the job done. Not much I can say about it aside from that.

Teensies are fantastic boards for projects that need a high clock speed unfortunately to make a Teensy an Xbox 360 controller third party libraries will be needed as the default framework hardcodes preselected USB description headers for specific devices. I needed a way to switch from one USB descriptor to another when sending a disconnect command out and I still haven't been able to use this device for that purpose however less dynamic USB connections work fine.

The T4.1 is like an Arduino on steroids, yet still compatible with the IDE, plus PlatformIO. I've spent the past 6 years using the T4.1 to develop a midi controllable laser synthesizer to project abstract imagery from industry standard RGB laser projectors. PJRC's Audio Library and online object oriented Audio Design Tool is a game changer, especially for beginner programmers

Perfect for Synth and MIDI projects. Amazing upgrade from Arduino microcontrollers. I would be nice if it was a 5 volt device, instead of 3.3. but so far it hasn't been a problem for me. Great product!

Works perfectly for me! Although it was a little more expensive than buying from other places, it worked perfectly!

if you are familiar with the Arduino concept and can program a bit this device is a must... set up a jig to hold you headers and solder them yourself... the teensy 3.5, 3.6, 4.0, 4.1.. wow Wow WOw WOW..... there is no other description for what these devices can do..... the 4.1 using simple digitalWrite HIGH low one can generate 30 nsec pules on that pin, and it can by coding be made faster... writing code to control the logic lines of interfaced chips is possible, SPI and I2C channels also exist not to mention the A/D capabilities.. you will need to download the extension to the Arduino IDE and learn the new form of the A/D convert call... in the picture the teensy 3.6 and 4.1 are in setups. the scope picture shows the adj resistance X9C104 being changed it is is series with a 10k to Vcc.. i think it was 10k.... the time expanded pic show the timing detail.. i have delayMicrosecond(10 in the pulse generation code... learn to code.....!

Not available with pins anymore, apparently. VERY time-consuming to solder in on your own. Not good customer focus.