NEW PRODUCT – Adafruit PiCowbell DVI Output for Pico – Works with HDMI Display

NEW PRODUCT – Adafruit PiCowbell DVI Output for Pico – Works with HDMI Display


Ding dong! Hear that? It’s the PiCowbell ringing, letting you know that the new Adafruit PiCowbell DVI Output for Pico is in stock and ready to display images and graphics from a microcontroller directly to an HDMI monitor or television! Note it doesn’t do audio, just graphics.

The PiCowbell DVI is the same size and shape as a Pico and is intended to socket underneath to make your next video output project super easy. Mini HDMI connector for use with standard HDMI cables? Yes! STEMMA QT / Qwiic connector for fast I2C? Indeed. Reset button & extra switch for restarting code or changing configuration? Bien sur.

5745 iso ORIG 2023 05

5745 top ORIG 2023 05

The PiCowbell DVI provides you with the following:

  • Right angle JST SH connector for I2C / Stemma QT / Qwiic connection. Provides 3V, GND, IO4 (SDA), and IO5 (SCL). Also connected to the HDMI sink (monitor) with level shifting, so the EDID can be read.
  • Mini HDMI connector for DVI output to any HDMI display or monitor.
    • GPIO6: D2+
    • GPIO7: D2-
    • GPIO8: D1+
    • GPIO9: D1-
    • GPIO10: D0+
    • GPIO11: D0-
    • GPIO12: Clock +
    • GPIO13: Clock –
  • Pin breakout for HDMI extras: Utility, CEC, and HotPlug pins
  • Reset button – Press to restart your program
  • Slide switch – On GPIO #3 for whatever purpose you wish.
  • Many pads on the ‘Bell has a duplicate hole pad next to it for solder-jumpering
  • The ground pads have white silkscreen rectangles to easily identify
  • Gold-plated pads for easy soldering

5745 side 02 ORIG 2023 05

5745 side 01 ORIG 2023 05

In Arduino, which is what we recommend, we use our fork of PicoDVI to create an internal framebuffer of 320×240 or 400×240 16-bit pixels that is then continuously blitted out as pixel-doubled 640×480 or 800×480 digital video. Whatever you ‘draw’ to the internal memory framebuffer appears instantly on the digital display in crisp color. Since the library is a subclass of AdafruitGFX, it’ll be familiar to folks who have used our TFT or OLED displays before.

There’s also DVI output support in CircuitPython as of 8.1.0b2 – but note that it uses a lot of memory so in particular if you want to use PicoW with WiFi support, you’ll likely only be able to get away with monochrome display.

Note that the DVI video generation uses one full core, both PIOs and 150K (320×240) or 190K (400×240) of SRAM. It’s kinda maxed out so be aware of the remaining resource limitations.

We also connected the HDMI-connectors I2C pins to the SDA/SCL of the Pico (through a safe level shifter) so you can read the EDID EEPROM of displays, and have broken out the CEC and Utility pads. The Hot Plug Detect pin is also available. Read this pin to know when a display has been connected!

Each order comes with an assembled PCB and header. You will need to solder in the header yourself, but it’s a quick task.

5745 kit ORIG 2023 05

5745 demo ORIG 2023 05

Please Note! There are a lot of possible configurations, and we stock various headers depending on how you want to solder and attach. Especially if you want the Pico on top so that the BOOTSEL button and LED are accessible.

  1. Use the Pico Stacking Headers if you want to be able to plug into a breadboard or other accessory with sockets.
  2. Use the Pico Socket Headers if you want to plug directly in and have a nice solid connection that doesn’t have any poking-out-bits.
  3. Use the Short Socket Headers for a very slim but pluggable design; note that you’ll want to trim down the Pico’s headers or use the short plug headers on the Pico to have a skinny sandwich.
  4. Solder the PCB directly to the Pico headers – of course, this is very compact and inexpensive, but you won’t be able to remove the PiCowbell.

5745 quarter ORIG 2023 05

In stock and shipping now!


Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards

Join Adafruit on Mastodon

Adafruit is on Mastodon, join in! adafruit.com/mastodon

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Join over 36,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — “Packaging” chips in the US

Wearables — Enclosures help fight body humidity in costumes

Electronics — Transformers: More than meets the eye!

Python for Microcontrollers — Python on Microcontrollers Newsletter: Silicon Labs introduces CircuitPython support, and more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi

Adafruit IoT Monthly — Guardian Robot, Weather-wise Umbrella Stand, and more!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — #NewProds 7/19/23 Feat. Adafruit Matrix Portal S3 CircuitPython Powered Internet Display!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.