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The Adafruit PiCowbell DVI Output for Pico lets you drive an HDMI monitor or television directly from a Raspberry Pi Pico or Pico W. It features a mini HDMI ...

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The Adafruit PiCowbell DVI Output for Pico lets you drive an HDMI monitor or television directly from a Raspberry Pi Pico or Pico W. It features a mini HDMI connector and outputs DVI-compatible digital video — just plug in a standard mini-HDMI-to-HDMI cable and start displaying graphics. Note that this board outputs video only, not audio.

In Arduino (recommended), the board uses the PicoDVI library to create a 320×240 or 400×240 pixel framebuffer that is pixel-doubled to 640×480 or 800×480 output. The library subclasses AdafruitGFX, so it's familiar if you've used Adafruit TFT or OLED displays. CircuitPython also supports DVI output, though memory constraints may limit you to monochrome display on Pico W with WiFi enabled.

Key Features

  • Mini HDMI Connector – DVI output to any HDMI-compatible display or monitor
  • STEMMA QT / Qwiic Connector – Right-angle JST SH for I2C devices on GPIO 4 (SDA) and GPIO 5 (SCL), also level-shifted to the HDMI connector for reading display EDID data
  • Reset Button – Conveniently placed for quick program restarts
  • Slide Switch – Connected to GPIO 3 for user-defined functions
  • HDMI Extras Breakout – Pads for Utility, CEC, and Hot Plug Detect pins
  • Gold-Plated Pads – Duplicate hole pads next to each pin for solder-jumpering; ground pads marked with white silkscreen

DVI Pin Mapping

  • GPIO 6/7 – D2+/D2−
  • GPIO 8/9 – D1+/D1−
  • GPIO 10/11 – D0+/D0−
  • GPIO 12/13 – Clock+/Clock−
Note: DVI video generation uses one full RP2040 core, both PIO blocks, and 150–190 KB of SRAM depending on resolution. Plan your project around these resource constraints.

Header Options

Ships with an assembled PCB and header that requires soldering. Several configurations are available:

  • Stacking Headers – Plug into a breadboard or other accessories with sockets
  • Socket Headers – Plug the Pico directly in for a solid, compact connection
  • Short Socket Headers – Ultra-slim pluggable design; pair with Short Plug Headers on the Pico for a skinny sandwich
  • Direct Soldering – Most compact and inexpensive, but permanent

Ideal For

  • Microcontroller-driven HDMI displays and dashboards
  • Retro gaming and graphics projects with Pico
  • Digital signage and information displays
  • Prototyping video output without a full single-board computer

Package Contents

  • 1× Adafruit PiCowbell DVI Output PCB (assembled with mini HDMI connector)
  • 1× Header (requires soldering)
Note: Raspberry Pi Pico, HDMI cable, and headers for the Pico are sold separately. Mount the Pico on top if you want the BOOTSEL button and LED accessible.

Resources

Jargon buster

Plain-language definitions for the technical terms used above.

breakout
A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
CircuitPython
A beginner-friendly version of Python designed to run directly on microcontroller boards. If a product supports CircuitPython, you can often program it by copying code files onto the board rather than setting up a more complex toolchain.
GPIO
General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
HDMI
HDMI is a common digital video and audio connection used by computers, media players, and many displays. If a display kit has HDMI input, it is usually much easier to test with a single-board computer because it can act like a normal monitor.
Headers
Rows of metal pins used to plug a module into a breadboard or connect it with jumper wires. Pre-soldered headers make the module easier to use straight away without needing to solder the pins yourself.
I2C
I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
LED
A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
microcontroller
A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
OLED
OLED stands for organic light-emitting diode, a display type where each pixel produces its own light. It matters because OLED screens are thin, high-contrast and easy to read for small status displays, but they can be more sensitive to image burn-in than some other display types.
PCB
A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
Qwiic
Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
RP2040
A microcontroller chip used on many maker boards, with enough speed and flexible I/O for some camera and display projects. Compatibility with RP2040 matters because camera modules often need many pins and careful timing to read image data successfully.
single-board computer
A complete computer built onto one circuit board, usually including the processor, memory, ports, and connectors. This matters because accessories like heatsinks must match the board’s layout and mounting holes to fit properly.
SRAM
Fast temporary memory used by a processor while a program is running. More SRAM helps with projects that handle larger data buffers, networking, displays, or more complex code.
STEMMA QT
A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
TFT
A thin-film transistor display is a common type of colour LCD used for graphics screens. Knowing a product is for TFTs helps you check that the driver board matches the display’s connector, resolution, backlight, and signalling method.
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