A complete Arduino microcontroller development system on one chip 

With the SAMD21G, a complete Arduino microcontroller development system with very less additional components can be build:

See the SAMD21G article here.

Complete microcontroller development system with the Arduino SAMD21G
Complete microcontroller development system with the Arduino SAMD21G

Note that we need a SAMD21G with a preprogrammed bootloader, but these are hard to get. I have a special programmer to burn the bootloader into SAMD21G chips:

SAMD21G preloaded with Arduino Zero Bootloader for sale
SAMD21G preloaded with Arduino Zero Bootloader for sale

You can also use the SAMD21G with bootloader to repair a blown up SAMD21 mini breakout board:

SAMD21 Mini Breakout repair
SAMD21 Mini Breakout repair

FOR SALE: ATSAMD21G18A-AUT with Arduino Zero Bootloader

If you don't want to burn the bootloader yourself, I can deliver an ATSAMD21G18 with bootloader to you. 
To order, contact me personally. You can pay with PayPal. The price is €7.50 and the shipping costs are €4.95 for all countries worldwide. You will also support my website financially this way. 

NEW: Mini SAMD21 development board 15x15mm (Arduino compatible)

The smallest Arduino compatible SAMD21 board: 15x15 mm, 34 I/O pins
The smallest Arduino compatible SAMD21 board: 15x15 mm, 34 I/O pins

The SAM 15x15 is an Arduino development board of just 15 x 15mm, with the same powerful controller as the Arduino Zero: the SAMD21G18. Despite the small size, it has more I/O pins than the Arduino Zero: 34 instead of 20. See the article and how to buy here.

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