Schematik raised $4.6M to help anyone build hardware with AI$4.6MIL PRE-SEED ANNOUNCEMENT
CommunityPartsBlogAbout
CommunityPartsBlogAbout

Product

  • Home
  • Try Schematik
  • Download

Resources

  • Community
  • ESP32 projects
  • Blog
  • Press
  • Information for AI

Compare

  • Schematik or Fritzing
  • Schematik or Tinkercad
  • Schematik or Wokwi
  • Schematik or Claude Code

Company

  • Company
  • Jobs
  • Privacy
Making
hardware
less hard

Built with love in Europe. For makers everywhere.

© 2026 Schematik

All rights reserved

  1. Parts
  2. /Boards
  3. /Pico & RP2040 boards

Adafruit Proto Under Plate PiCowBell for Pico

OverviewAlternates
Adafruit Proto Under Plate PiCowBell for Pico - Adafruit - 5905

Solder-free proto plate for Raspberry Pi Pico/Pico H, adding a reset button and a STEMMA QT / Qwiic I2C connector. Mounts under the Pico on a breadboard. Requires Pico H or Pico WH for plug-and-play use; standard Pico needs header soldering.

Parts tray full · 5 max · remove a part to add another
STEPSTLSTL

Offers

  • Adafruit$4.50
  • ?DigiKey$4.50

Offers

  • Adafruit$4.50
  • ?DigiKey$4.50

Pinout

Logical pinout · physical placement not verified
ADAFRUIT PROTO UNDER P2x20 Pico socket headersResetSTEMMA QTQwiic 3V3.3V stripSTEMMA QTQwiic GNDGND stripI2C breakout holesProto strips
  • 2x20 Pico socket headersdual 2x20 slim socket headers

    Main Raspberry Pi Pico socket interface; plug in a Pico and access each Pico pin through an extra row of sockets.

    Type · Unknown
  • STEMMA QTQwiic 3VJST-SH connector

    3V supply on the right-angle JST-SH STEMMA QT/Qwiic connector.

    Type · PowerVoltage · 3V
  • STEMMA QTQwiic GNDJST-SH connector

    Ground on the right-angle JST-SH STEMMA QT/Qwiic connector.

    Type · GroundVoltage · 0V reference
  • I2C breakout holesbeside JST-SH connector

    Extra set of four breakout holes next to the JST-SH connector for additional I2C connections or reassignment.

    Type · Unknown
  • Resetboard edge

    Right-angle reset button that sticks out from the end of the board.

    Type · Control
  • 3.3V stripproto area

    Long strip of connected holes for 3.3V power.

    Type · PowerVoltage · 3.3V
  • GND stripnear reset button

    Ground pads and long ground strip identified by Adafruit near the reset button.

    Type · GroundVoltage · 0V reference
  • Proto stripscentre proto area

    Three hole-connected strips in the centre area, intended as a mini solderless proto area with cuttable traces.

    Type · Unknown
PinPositionTypeFunctionVoltage
2x20 Pico socket headersdual 2x20 slim socket headersUnknownMain Raspberry Pi Pico socket interface; plug in a Pico and access each Pico pin through an extra row of sockets.
STEMMA QTQwiic 3VJST-SH connectorPower3V supply on the right-angle JST-SH STEMMA QT/Qwiic connector.3V
STEMMA QTQwiic GNDJST-SH connectorGroundGround on the right-angle JST-SH STEMMA QT/Qwiic connector.0V reference
I2C breakout holesbeside JST-SH connectorUnknownExtra set of four breakout holes next to the JST-SH connector for additional I2C connections or reassignment.
Resetboard edgeControlRight-angle reset button that sticks out from the end of the board.
3.3V stripproto areaPowerLong strip of connected holes for 3.3V power.3.3V
GND stripnear reset buttonGroundGround pads and long ground strip identified by Adafruit near the reset button.0V reference
Proto stripscentre proto areaUnknownThree hole-connected strips in the centre area, intended as a mini solderless proto area with cuttable traces.
Logical pinout · physical placement not verified
ADAFRUIT PROTO UNDER P2x20 Pico socket headersResetSTEMMA QTQwiic 3V3.3V stripSTEMMA QTQwiic GNDGND stripI2C breakout holesProto strips

Pin details

8 connections
  1. 2x20 Pico socket headers

    Main Raspberry Pi Pico socket interface; plug in a Pico and access each Pico pin through an extra row of sockets.

    Unknown
    dual 2x20 slim socket headers
  2. STEMMA QTQwiic 3V

    3V supply on the right-angle JST-SH STEMMA QT/Qwiic connector.

    PowerVoltage · 3V
    JST-SH connector
  3. STEMMA QTQwiic GND

    Ground on the right-angle JST-SH STEMMA QT/Qwiic connector.

    GroundVoltage · 0V reference
    JST-SH connector
  4. I2C breakout holes

    Extra set of four breakout holes next to the JST-SH connector for additional I2C connections or reassignment.

    Unknown
    beside JST-SH connector
  5. Reset

    Right-angle reset button that sticks out from the end of the board.

    Control
    board edge
  6. 3.3V strip

    Long strip of connected holes for 3.3V power.

    PowerVoltage · 3.3V
    proto area
  7. GND strip

    Ground pads and long ground strip identified by Adafruit near the reset button.

    GroundVoltage · 0V reference
    near reset button
  8. Proto strips

    Three hole-connected strips in the centre area, intended as a mini solderless proto area with cuttable traces.

    Unknown
    centre proto area

Pi Pico

42 other options

The Raspberry Pi MCU line — Pico, Pico 2, and third-party boards on the same silicon — plus a deep bench of Pico-pinout displays, loggers, and radio modules that do nothing without a Pico plugged in.

View all 42
  • Adafruit DVI Breakout Board for HDMI Source Devices visual preview

    Adafruit DVI Breakout Board for HDMI Source Devices

    $1.95
  • Adafruit DVI Sock for Pico - Works with HDMI Displays visual preview

    Adafruit DVI Sock for Pico - Works with HDMI Displays

    $2.95
  • Adafruit Feather RP2040 with DVI Output Port - Works with HDMI visual preview

    Adafruit Feather RP2040 with DVI Output Port - Works with HDMI

  • Adafruit MACROPAD RP2040 Bare Bones - 3x4 Keys + Encoder + OLED visual preview

    Adafruit MACROPAD RP2040 Bare Bones - 3x4 Keys + Encoder + OLED

  • Adafruit PiCowbell Adalogger for Pico visual preview

    Adafruit PiCowbell Adalogger for Pico

    $12.95
  • Adafruit RP2350 22-pin FPC HSTX to DVI Adapter for HDMI Displays visual preview

    Adafruit RP2350 22-pin FPC HSTX to DVI Adapter for HDMI Displays

  • Adafruit Terminal PiCowbell for Pico visual preview

    Adafruit Terminal PiCowbell for Pico

    $12.50
  • Beetle RP2040 Mini Development Board visual preview

    Beetle RP2040 Mini Development Board

  • Dual GPIO Expander for Raspberry Pi Pico, Two Sets of Male Headers visual preview

    Dual GPIO Expander for Raspberry Pi Pico, Two Sets of Male Headers

  • Gravity: Expansion Board for Raspberry Pi Pico / Pico 2 visual preview

    Gravity: Expansion Board for Raspberry Pi Pico / Pico 2

  • Inventor 2350 W (Pico 2 W Aboard) visual preview

    Inventor 2350 W (Pico 2 W Aboard)

    $49.50
  • IO Expansion Board for Raspberry Pi Pico / Pico 2 visual preview

    IO Expansion Board for Raspberry Pi Pico / Pico 2

Related groups

4 groups
10 I/Os PLC Module - CPU Arduino Nano (Optoisolated Output) visual preview

Arduino

About 75 boards across every Arduino generation: 5V Uno/Mega/GIGA, 3.3V MKR and Portenta, plus DFRduino and Bluno compatibles. Confirm the voltage rail before stacking any shield.

Boards · Arduino boards · 77 parts

10 I/Os Relay Module - CPU ESP32 (Relay Output) visual preview

ESP32

Wi-Fi and Bluetooth on a single chip, in every shape from Espressif DevKitC to Adafruit Feathers with STEMMA QT, DFRobot FireBeetles tuned for battery life, and Seeed XIAOs under a thumbnail.

Boards · ESP32 boards · 156 parts

15x7 CharliePlex LED Matrix FeatherWing - Cool White visual preview

Add-ons

About 270 add-ons across Pi HATs, Arduino shields, and FeatherWings. The same function — motor control, PoE, display — usually ships once per host connector family. Get the host board right first.

Boards · HATs, Shields & add-ons · 270 parts

16-Ch Servo Driver Breakout for micro:bit, I2C visual preview

Other MCUs

Specialists: Teensy for high-clock audio and USB, Adafruit SAMD boards running CircuitPython or the Arduino IDE, proper STM32 eval kits, and the micro:bit classroom ecosystem. Schematik builds target ESP32, Arduino Uno, and Pico; come here when you have a specific reason to.

Boards · Other MCU boards · 229 parts