![]() *Customers looking to resell on eBay or Amazon should contact Adafruit directly. Learning tips and tutorials can be seen here. Power with either USB or external output (e.g.Reverse polarity protection, thermal and current-limit protection.Pins #2 and #7 not available (they are exclusively for USB).Once headers are installed they can be fitted into 0.6" wide sockets.PCB measures only 38.1 x 17.78 x 5.08 mm (without headers). ![]() The Trinket is programmable using the AVRdude and/or the Arduino IDE, and there is a reset button for entering the bootloader or restarting the program as well as LED indication for bootloading. There is no serial to USB chip and the USB connection is for uploading new code only. This 3.3V version operates at 12MHz and is Arduino compatible, working with 99% of existing Arduino sketches. There is onboard USB bootloading support (via a micro USB jack) and Optiboot support enable programming over USB or with a FTDI cable. The Trinket is designed with 18x GPIO pins, 2x extra analog inputs, 28K of FLASH and 2K of RAM. The Pro Trinket uses the ATmega328 common-core chip to give a microcontroller similar to the Arduino Pro Mini but with USB and more pins.
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