•ATmega 328P onboad chip in QFN package•12 M Hz clock rate, 28K FLASH available•USB bootloader with a nice LED indicator looks just like a USBtiny ISP so you can program it with AVRdude and/or the Arduino IDE• Also has headers for an FTDI port for reprogramming• Micro-USB jack for power and/or USB (Universal Serial Bus) uploading, you can put it in a box or tape it up & use any USB (Universal Serial Bus) cable for when you want to reprogram• On-board 3.3V power regulator with 150m A output capability & ultra-low dropout. Up to 16V input, reverse-polarity protection, thermal & current-limit protection• Power with either USB (Universal Serial Bus) or external output (such as a battery)
- it'll automatically switch over• On-board green power LED & red pin 13 LED• Reset button for entering the bootloader or restarting the program• Works with 99% of existing Arduino sketches• Mounting holes! Yeah! Trinket's got a big sister in town
- the Pro Trinket! Pro Trinket combines everything you love about Trinket with the familiarity of the core Arduino chip, the ATmega 328. It's like an Arduino Pro Mini with more pins & USB (Universal Serial Bus) tossed in. Trinket's a year old now, & while its been great to see tons of tiny projects, sometimes you just need more pins, more FLASH, & more RAM. That's why Adafruit designed Pro Trinket, with 18 GPIO, 2 extra analog inputs, 28K of flash, & 2K of RAM. Like the Trinket, it has onboard USB (Universal Serial Bus) bootloading support
- Adafruit opted for a Micro USB jack this time. Adafruit also added Optiboot support, so you can either program your Pro Trinket over USB (Universal Serial Bus) or with a FTDI cable just like the Pro Mini & friends. The Pro Trinket PCB measures only 1.5"" x 0.7"" x 0.2"" (without headers) but packs the same capability as an Arduino UNO. So it's great once you've finished up a prototype on an official Arduino UNO & want to make the project smaller. The Pro Trinket uses the Atmega 328P chip, which is the same core chip in the Arduino UNO/ Duemilanove/ Mini/etc. However, the 3V version uses 3V logic & 12 M Hz clock which means it's good when you want a lower-power & lower-voltage setup. Pro Trinket is programmable using the Arduino IDE as you already set up, & 95% of Arduino projects will work out of the box! For tons more details, check out the Introducing Pro Trinket tutorial or the Datasheet Here's some things you may have to consider when adapting Arduino sketches: Pins 2 & 7 are not available (they are exclusively for USB) The Pro Trinket 3V runs at 12 M Hz, this doesn't affect most projects. Only the most timing-specific libraries may be affected, check the documentation! The Neo Pixel Library works fine at 12 M Hz. The onboard power supply is a 3.3V regulator & it can provide 150m A output You cannot plug shields directly into the Pro Trinket There is no Serial-to-USB chip onboard. This is to keep the Pro Trinket small & inexpensive, you can use any FTDI cable to connect to the FTDI port for a Serial connection. The USB (Universal Serial Bus) connection is for uploading new code only. The bootloader on the Pro Trinket use 4KB of FLASH so the maximum sketch size is 28, 672 bytes. The bootloader does not affect RAM usage. Here's some handy specifications:ATmega 328P onboad chip in QFN package 12 M Hz clock rate, 28K FLASH available USB bootloader with a nice LED indicator looks just like a USBtiny ISP so you can program it with AVRdude and/or the Arduino IDE (with a few simple config modifications). Also has headers for an FTDI port for reprogramming Micro-USB jack for power and/or USB (Universal Serial Bus) uploading, you can put it in a box or tape it up & use any USB (Universal Serial Bus) cable for when you want to reprogram. On-board 3.3V power regulator with 150m A output capability & ultra-low dropout. Up to 16V input, reverse-polarity protection, thermal & current-limit protection. Power with either USB (Universal Serial Bus) or external output (such as a battery)
- it'll automatically switch over On-board green power LED & red pin 13 LEDReset button for entering the bootloader or restarting the program. Works with 99% of existing Arduino sketches (anything that doesn't use more than 28K, & doesn't require pins 2 & 7) Mounting holes! Yeah!