Add WinUSB driver for USBtinyISP programmers. NOTE: The installer executable and the drivers are no longer signed. Our signing certificate has expired, and given that Windows 7 is past end-of-life, and Windows 8.x is little used, we do not plan to renew our certificate. So you will need to approve installing an unsigned driver. To support this screen, a kernel-mode display-only driver was created to establish direct access to the Adafruit PiTFT display via SPI. The driver initializes the display and presents at 16 frames per second. Plug in the Trinket, make sure you see the green LED lit (power good) and the. Red LED pulsing. Press the reset button if the red LED is not pulsing, to get. Into bootloader mode. Click the Upload button (or select File-Upload) 3) If all else fails, the board can be programmed using an FTDI cable.
Introduction
This tiny board is using the ATmega328p microcontroller, it's like an Arduino Pro Mini but with more pins and micro build-in USB port. The ATmega328p chip can also be found on Arduino uno board! It can powered up by usb cable or external battery. You can find two versions of ProTrinket board: 3V and 5V. The only diference between them is the operating 'logic' voltage.
About the Pro Trinket board
Adafruit Pro Trinker Board specs:
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- Power with either USB or external output (such as a battery) - it'll automatically switch over
- On-board green power LED and red LED at pin #13
- Reset button for entering the bootloader or restarting the program
- Works with 99% of existing Arduino sketches (anything that doesn't use more than 28K, and doesn't require pins #2 and #7)
- Mounting holes, you can easily attach it to breadboard or plug it in your own circuit board!
Pinout of Pro Trinket board:
- RX - also known as Digital #0, this is the hardware serial input pin
- TX - also known as Digital #1, this is the hardware serial output pin
- Digital 3 - this pin can also be used as a PWM output pin using analogWrite()
- Digital 4 - Nothing particularly special about this GPIO pin
- Digital 5 - this pin can also be used as a PWM output pin using analogWrite()
- Digital 6 - this pin can also be used as a PWM output pin using analogWrite()
- Digital 8 - Nothing particularly special about this GPIO pin
- Digital 9 - this pin can also be used as a PWM output pin using analogWrite() It's also good for driving servos because its a high-speed PWM output
- Digital 10 - this pin can also be used as a PWM output pin using analogWrite() It's also good for driving servos because its a high-speed PWM output
- Digital 11 - Also known as the SPI MOSI pin. this pin can also be used as a PWM output pin using analogWrite()
- Digital 12 - Also known as the SPI MISO pinDigital 13 - Also known as the SPI CLOCK pin
- Analog 0 - also known as Digital 14, this pin can be a digital I/O pin or an analog input pin
- Analog 1 - also known as Digital 15, this pin can be a digital I/O pin or an analog input pin
- Analog 2 - also known as Digital 16, this pin can be a digital I/O pin or an analog input pin
- Analog 3 - also known as Digital 17, this pin can be a digital I/O pin or an analog input pin
- Analog 4 - also known as Digital 18, this pin can be a digital I/O pin or an analog input pin. It's also the I2C SDA pin
- Analog 5 - also known as Digital 19, this pin can be a digital I/O pin or an analog input pin. It's also the I2C SCL pin
If you're used to using an Arduino Uno, you may notice that pins #2 and #7 are not available. That's because we use those two pins for the USB bootloader. They are not available for use and are not broken out. |
There are two versions of the Pro Trinket: 3V and 5V. They are almost identical but there are slight differences in the pinouts: one has a 3V output pin in the top right, the other has a 5V output pin instead.
On a 3V Pro Trinket, the GPIO are 3.3V output level, and should not be used with 5V inputs. On a 5V Pro Trinket, the GPIO are 5V output level, and can be used with 3V inputs but may damage electronic devices that are 3V input only!
- Aref pin - this is the optional analog reference pin for the analog converter, to be used when you want the 'top' of the analog converter to be different than 3V or 5V. Connect this to your desired reference voltage (between 0 and the Pro Trinket voltage) and useanalogReference(EXTERNAL)
First time of using it?
You should see the green power LED lit and the red bootloading LED pulse indicating that the Trinket is ready to start bootloading. If you've programmed the Pro Trinket since getting it, you can always get it back to the bootloader state by pressing the small onboard reset button.
Note: If you are using Windows 10 (or something goes wrong with drivers installation for this device):
Click here and download the zip file by clicking the green box 'Download Signed Adafruit Trinket/Gemma Driver'.
Unzip files and then plug in the Trinket with the USB cable to start the process.
Now you have to go on Device manager, find Other devices, double click on Trinket, 'Update Driver Software' and then click on 'Browse my computer for driver software'. Find the folder that you have unzip the drives package and click next and install.
If you find any problems with this procedure you can read this detailed guide at official Adafruit website.
Program it with Codebender!
We will use the Codebender to program the board but if you still want to use the Arduino IDE you have to install Adafruit boards on it first. Just follow the instructions on this link.
To build the circuit, connect one end of 220Ω resistor to Pro Trinket pin 3, then connect the long leg of the LED (the positive leg, called the anode) to the other end of the resistor. Now connect the short leg of the LED (the negative leg, called the cathode) to the Pro Trinket 'G' pin (GND).
Connect the Pro Trinket board with your computer, select yours Adafruit Pro Trinket version board from boards menu and leave as it port selection. Now click the 'Run on Arduino' button. That's it, you've programmed your Pro Trinket board with blink sketch! You will see your LED blinking every 3 seconds. |
Update: Chrome support for Gemma/Trinket changed in November 2015, so if it doesn't work, try Firefox
Well done!
I hope you liked this, let me know in the comments.
Introduction
This tiny board is using the ATtiny85 microcontroller and it has 8K of flash memory, 5 I/O pins (including analog inputs and PWM outputs) and a USB connection (mini-USB). It can powered up by usb cable or external battery.
You can find two versions of Trinket board: 3V and 5V. The only diference between them is the operating 'logic' voltage.
About the ATtiny85 and Trinket
ATtiny85 microcontroller:- 8K of flash
- 512 byte of SRAM
- 512 bytes of EEPROM
- Internal 8MHz oscillator (it can be doubled in software for 16MHz - only on 5V version of Trinket)
- 5 I/O (with 3 analog inputs and 2 PWM pins)
- USB bootloader with an LED indicator
- Mini USB jack for program uploading
- ~5.25K bytes available for use (2.75K taken for the bootloader
- Available in both 3V and 5V
- On-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 over
- On-board green power LED and red (pin #1) LED
- Reset button for entering the bootloader or restarting the program
- Hardware I2C / SPI capability for breakout & sensor interfacing
- Mounting holes, you can easily attach it to breadboard or plug it in your own circuit board!
First time of using it?
You should see the green power LED lit and the red bootloading LED pulse indicating that the Trinket is ready to start bootloading. If you've programmed the Trinket since getting it, you can always get it back to the bootloader state by pressing the small onboard reset button
Note: If you are using Windows 10 (or something goes wrong with drivers installation for this device):
Click here and download the zip file by clicking the green box 'Download Signed Adafruit Trinket/Gemma Driver'.
Unzip files and then plug in the Trinket with the USB cable to start the process.
Now you have to go on Device manager, find Other devices, double click on Trinket, 'Update Driver Software' and then click on 'Browse my computer for driver software'. Find the folder that you have unzip the drives package and click next and install.
If you find any problems with this procedure you can read this detailed guide at official Adafruit website.
Program it with Codebender!

We will use the Codebender to program the board but if you still want to use the Arduino IDE you have to install Adafruit boards on it first. Just follow the instructions on this link.
To build the circuit, connect one end of the resistor to Trinket pin 3, then connect the long leg of the LED (the positive leg, called the anode) to the other end of the resistor. Now connect the short leg of the LED (the negative leg, called the cathode) to the Trinket GND pin.
Adafruit Trinket Driver Windows 10 32 Bit
Connect the Trinket board with your computer, select 'Adafruit Trinket 8MHz' from boards menu and leave as it port selection. Now click the 'Run on Arduino' button. That's it, you've programmed your Trinket board with blink sketch! You will see your LED blinking every 3 seconds. |
Update: Chrome support for Gemma/Trinket changed in November 2015, so if it doesn't work, try Firefox
Well done!
I hope you liked this, let me know in the comments.
Adafruit Trinket Pro

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