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Description
Adafruit Feather M4 CAN Express with ATSAME51#4759 One of our favorite Feathers, the Feather M4 Express, gets a glow up here with an upgrade to the SAME51 chipset which has built in CAN bus support! Like its SAMD51 cousin, the ATSAME51J19 comes with a 120MHz Cortex M4 with floating point support and 512KB Flash and 192KB RAM. Your code will zig and zag and zoom, and with a bunch of extra peripherals for support, this will for sure be your favorite new chipset for CAN interfacing projects. At the
#4759
One of our favorite Feathers, the Feather M4 Express, gets a glow-up here with an upgrade to the SAME51 chipset which has built-in CAN bus support! Like its SAMD51 cousin, the ATSAME51J19 comes with a 120MHz Cortex M4 with floating point support and 512KB Flash and 192KB RAM. Your code will zig and zag and zoom, and with a bunch of extra peripherals for support, this will for sure be your favorite new chipset for CAN interfacing projects.
At the end of the board we have placed a CAN transceiver chip as well as a 5V converter to generate 5V power to the transceiver even when running on battery. The two CAN signal lines and ground reference signal are available on a 3-pin 3.5mm terminal block. The chip and booster can be put to sleep for power saving. The built in CAN can read or write packets and has support in both Arduino and CircuitPython.
And best of all, it's a Feather - so you know it will work with all our FeatherWings! What a great way to quickly get up and running. It's even pin-compatible with the original Feather M4.
The most exciting part of the Feather M4 CAN is that while you can use it with the Arduino IDE - and it's bonkers fast when you do, you can use it with CircuitPython as well. When you plug it in, it will show up as a very small disk drive with main.py on it. Edit main.py with your favorite text editor to build your project using Python, the most popular programming language. No installs, IDE or compiler needed, so you can use it on any computer, even ChromeBooks or computers you can't install software on. When you're done, unplug the Feather and your code will go with you.
Here are some of the updates you can look forward to when using Feather M4 CAN:
- Measures 2.0" x 0.9" x 0.28" (50.8mm x 22.8mm x 7mm) without headers soldered in
- Light as a (large?) feather - 5 grams
- ATSAME51 32-bit Cortex M4 core running at 120 MHz, 32-bit, 3.3V logic and power
- Hardware CAN bus support with built-in transceiver, 5V booster and terminal connection.
- Floating point support with Cortex M4 DSP instructions
- 512 KB flash, 192 KB RAM
- 2 MB SPI FLASH chip for storing files and CircuitPython code storage.
- No EEPROM
- 32.768 KHz crystal for clock generation & RTC
- 3.3V regulator with 500mA peak current output
- USB Type C connector for USB native support, comes with USB bootloader and serial port debugging
- Built in crypto engines with AES (256 bit), true RNG, Pubkey controller
- Tons of GPIO! 21 x GPIO pins with following capabilities:
- Dual 1 MSPS 12 bit true analog DAC (A0 and A1) - can be used to play 12-bit stereo audio clips
- Dual 1 MSPS 12 bit ADC (6 analog pins some on ADC1 and some on ADC2)
- 6 x hardware SERCOM - Native hardware SPI, I2C and Serial all available
- 16 x PWM outputs - for servos, LEDs, etc
- I2S input and output
- 8-bit Parallel capture controller (for camera/video in)
- Built in 100mA lipoly charger with charging status indicator LED
- Pin #13 red LED for general purpose blinking
- Power/enable pin
- 4 mounting holes
- Reset button
The Feather M4 Can Express also comes with a Mini NeoPixel and 2 MB SPI Flash storage. You can use the SPI Flash storage like a very tiny hard drive. When used in CircuitPython, the 2 MB flash acts as storage for all your scripts, libraries and files. When used in Arduino, you can read/write files to it, like a little datalogger or SD card, and then with our helper program, access the files over USB.
Easy reprogramming: the Feather M4 CAN comes pre-loaded with the UF2 bootloader, which looks like a USB storage key. Simply drag firmware on to program, no special tools or drivers needed! It can be used to load up CircuitPython or Arduino IDE (it is bossa-compatible)
Comes fully assembled and tested, with the UF2 USB bootloader. We also toss in some headers so you can solder it in and plug into a solderless breadboard.
Lipoly battery and USB cable not included (but we do have lots of options in the shop if you'd like!)
Features
- Product Dimensions: 52.2mm x 22.8mm x 7.2mm / 2.1" x 0.9" x 0.3"
- Product Weight: 5.5g / 0.2oz
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4.5 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 5
Once you put them on, you will know you made the right decision
Size: 38, Color: Medium Tint Denim
Absolutely perfect in every way. Staring either the very reasonable price, the true to size fit, and quality. Hip pockets are deep, and can come in handy. Most don’t know that Wrangler actually started in 1904 as a company called Blue Bell, and later renamed Wrangler. Well established and a long history of top quality clothing. Although you may find another company selling for a bit less, that’s what you’ll get……Less !!?
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Good shorts but they run big
Size: 38, Color: Dusty Olive
I've been losing weight and picked these up in my new size (38). It turns out these are cut for a generous American midsection, and have an elastic fit in the waist, so you can (and probably should!) safely go down a size. I got mine in 34 instead and they fit great.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Great fit, functional, most comfortable shorts!
Size: 30, Color: Anthracite Camo
These are my go-to shorts, I now have five pair in different camo colors! I suggest one waist size smaller than you normally wear, (I buy a 30 instead of a 32, because they stretch and would be too sloppy if I purchased my regular size). The large open slotted pocket on the left, behind the Velcro flap pocket, is perfect for a normal sized cell phone. Plenty of utility pockets for EDC. Since these stretch slightly to accommodate movement and sitting, they are extremely comfortable. Also, my wife says they are good looking on me, so that gets an extra star!
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Reviewed in the United States on March 24, 2026
★★★★★ 5
great shorts
Size: 38, Color: Gunmetal
excellent shorts. slightly loose around the waist, which i prefer. inseam is perfect just above the knee. light weight
and roomy. wash well.
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Reviewed in the United States on May 24, 2026
★★★★★ 5
The perfect throw-on athletic dress (with built-in shorts!)
Size: Small, Color: Navy Blue
I’ve been loving this athletic dress—it’s one of those pieces that’s both functional and cute, which is hard to find. The fabric is lightweight, breathable, and slightly stretchy, so it’s comfortable whether you’re running errands, going for a walk, or just chasing kids around all day.
The built-in shorts are a huge plus. They stay in place well and make it feel more secure than a regular dress, especially on busy days. I also appreciate the pockets—they’re actually usable and don’t feel bulky.
The fit is relaxed and flowy, which I personally like because it’s easy and flattering without clinging. The straps are adjustable, so you can customize the fit a bit depending on your height or preference.
I’d say it runs true to size for a looser fit. If you want it more fitted, you could size down, but I like the casual, sporty look as is.
Overall, this is a great everyday summer staple—super easy to style with sneakers or sandals, and perfect for travel or on-the-go days. I’ll definitely be getting more colors!
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Reviewed in the United States on April 24, 2026