Adafruit Trinket — Mini Microcontroller — 5V Logic

Trin­ket may be small, but do not be fooled by its size! It’s a tiny micro­con­troller board, built around the Atmel ATtiny85, a lit­tle chip with a lot of pow­er. We want­ed to design a micro­con­troller board that was small enough to fit into any project, and low cost enough to use with­out hes­i­ta­tion. Per­fect for when you don’t want to give up your expen­sive dev-board and you aren’t will­ing to take apart the project you worked so hard to design. It’s our low­est-cost arduino-IDE pro­gram­ma­ble board!The Attiny85 is a fun proces­sor because despite being so small, it has 8K of flash, and 5 I/O pins, includ­ing ana­log inputs and PWM ‘ana­log’ out­puts. We designed a USB boot­loader so you can plug it into any com­put­er and repro­gram it over a USB port just like an Arduino. In fact we even made some sim­ple mod­i­fi­ca­tions to the Arduino IDE so that it works like a mini-Arduino board. You can’t stack a big shield on it but for many small & sim­ple projects the Trin­ket will be your go-to plat­form.This is the 5V Trin­ket. There are two ver­sions of the Trin­ket. One is 3V and one is 5V. Both work the same, but have dif­fer­ent oper­at­ing log­ic volt­ages. Use the 3V one to inter­face with sen­sors and devices that need 3V log­ic, or when you want to pow­er it off of a LiPo bat­tery. The 3V ver­sion should only run at 8 MHz. Use the 5V one for sen­sors and com­po­nents that can use or require 5V log­ic. The 5V ver­sion can run at 8 MHz or at 16MHz by set­ting the soft­ware-set clock fre­quen­cy.Even though you can pro­gram Trin­ket using the Arduino IDE, it’s not a ful­ly 100% Arduino-com­pat­i­ble. There are some things you trade off for such a small and low cost micro­con­troller!Trin­ket does not have a Ser­i­al port con­nec­tion for debug­ging so the ser­i­al port mon­i­tor will not be able to send/receive dataSome com­put­ers’ USB v3 ports don’t rec­og­nize the Trin­ket’s boot­loader. Sim­ply use a USB v2 port or a USB hub in betweenHere are some use­ful spec­i­fi­ca­tions!ATtiny85 on-board, 8K of flash, 512 byte of SRAM, 512 bytes of EEPROMInter­nal oscil­la­tor runs at 8MHz, but can be dou­bled in soft­ware for 16MHzUSB boot­loader with a nice LED indi­ca­tor looks just like a USBtiny­ISP so you can pro­gram it with AVR­dude (with a sim­ple con­fig mod­i­fi­ca­tion) and/or the Arduino IDE (with a few sim­ple con­fig mod­i­fi­ca­tions)Mini-USB jack for pow­er and/or USB upload­ing, you can put it in a box or tape it up and use any USB cable for when you want to repro­gram.We real­ly worked hard on the boot­loader process to make it rugged and fool­proof, this board wont up and die on you in the mid­dle of a project!~5.25K bytes avail­able for use (2.75K tak­en for the boot­loader)Avail­able in both 3V and 5V fla­vorsOn-board 3.3V or 5.0V pow­er reg­u­la­tor with 150mA out­put capa­bil­i­ty and ultra-low dropout. Up to 16V input, reverse-polar­i­ty pro­tec­tion, ther­mal and cur­rent-lim­it pro­tec­tion.Pow­er with either USB or exter­nal out­put (such as a bat­tery) — it’ll auto­mat­i­cal­ly switch overOn-board green pow­er LED and red pin #1 LEDReset but­ton for enter­ing the boot­loader or restart­ing the pro­gram. No need to unplug/replug the board every time you want to reset or update!5 GPIO — 2 shared with the USB inter­face. The 3 inde­pen­dent IO pins have 1 ana­log input and 2 PWM out­put as well. The 2 shared IO pins have 2 more ana­log inputs and one more PWM out­put.Hard­ware I2C / SPI capa­bil­i­ty for break­out & sen­sor inter­fac­ing.Works with many basic Arduino libraries includ­ing Adafruit Neopix­el!Mount­ing holes! Yeah!Real­ly real­ly smallTECHNICAL DETAILSDimen­sions: 1.2″ x 0.6″ x 0.2″ / 31mm x 15.5 x 5mmWeight (no head­ers): 1.85 grams