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Small green rectangular circuit board with micro USB port and pin headers

Adafruit

Adafruit Pro Trinket 3V 12MHz ATmega328P engineering development tool

SKU CH-JSCZ-9ET3E

A compact ATmega328P board running at 3.3 V and 12 MHz, programmable in the Arduino IDE with 95 % project compatibility

  • TypeEngineering Development Tools
  • Lower power with 3.3V logic and 12MHz clock
  • 95% of Arduino projects work without changes
  • Programmable via Arduino IDE with USB bootloader
  • 18 GPIO pins plus 2 extra analog inputs
  • Compact 1.5 x 0.7 x 0.2 inch board with ATmega328P

Pro Trinket 3V 12MHz overview

The Adafruit Pro Trinket is an engineering development tool built around the ATmega328P microcontroller running at 3.3 V logic and a 12 MHz clock. It provides 18 GPIO pins, two extra analog inputs, 28 KB of flash memory and 2 KB of RAM in a compact 1.5 by 0.7 inch board. The board is programmable through the Arduino IDE and includes a Micro-USB port for USB bootloading.

Who this suits and who should look elsewhere

Makers who need a smaller, lower-voltage alternative to a standard Arduino Uno will find the Pro Trinket a good fit for battery-powered or space-constrained prototypes. Builders who require 5 V logic levels, a faster clock speed or more than 28 KB of program storage should consider other platforms.

Deciding specification

The 3.3 V logic level is the single specification that determines whether this board matches your project; it dictates compatibility with sensors, displays and other peripherals that must operate at the same voltage.

Punti di forza

  • Lower power with 3.3V logic and 12MHz clock
  • 95% of Arduino projects work without changes
  • Programmable via Arduino IDE with USB bootloader
  • 18 GPIO pins plus 2 extra analog inputs
  • Compact 1.5 x 0.7 x 0.2 inch board with ATmega328P

Caratteristiche tecniche

TypeEngineering Development Tools

Domande su questo articolo

What logic voltage does the ATmega328P on the Pro Trinket 3V use?

The onboard ATmega328P runs at 3.3V logic, so all GPIO pins and serial lines operate at that level.

What are the board dimensions without headers?

The PCB measures 1.5" x 0.7" x 0.2" without headers soldered on.

How is the Pro Trinket 3V programmed over USB?

It uses the onboard USB bootloader with a MicroUSB jack; select the board in the Arduino IDE and press the reset button to enter bootloader mode before uploading.

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