Adafruit Proto Under Plate PiCowBell for Pico

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.

Logical pinout · physical placement not verified

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

Pin	Position	Type	Function	Voltage
2x20 Pico socket headers	dual 2x20 slim socket headers	Unknown	Main Raspberry Pi Pico socket interface; plug in a Pico and access each Pico pin through an extra row of sockets.
STEMMA QTQwiic 3V	JST-SH connector	Power	3V supply on the right-angle JST-SH STEMMA QT/Qwiic connector.	3V
STEMMA QTQwiic GND	JST-SH connector	Ground	Ground on the right-angle JST-SH STEMMA QT/Qwiic connector.	0V reference
I2C breakout holes	beside JST-SH connector	Unknown	Extra set of four breakout holes next to the JST-SH connector for additional I2C connections or reassignment.
Reset	board edge	Control	Right-angle reset button that sticks out from the end of the board.
3.3V strip	proto area	Power	Long strip of connected holes for 3.3V power.	3.3V
GND strip	near reset button	Ground	Ground pads and long ground strip identified by Adafruit near the reset button.	0V reference
Proto strips	centre proto area	Unknown	Three hole-connected strips in the centre area, intended as a mini solderless proto area with cuttable traces.

Logical pinout · physical placement not verified

Pin details

8 connections

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
STEMMA QTQwiic 3V
3V supply on the right-angle JST-SH STEMMA QT/Qwiic connector.
PowerVoltage · 3V
JST-SH connector
STEMMA QTQwiic GND
Ground on the right-angle JST-SH STEMMA QT/Qwiic connector.
GroundVoltage · 0V reference
JST-SH connector
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
Reset
Right-angle reset button that sticks out from the end of the board.
Control
board edge
3.3V strip
Long strip of connected holes for 3.3V power.
PowerVoltage · 3.3V
proto area
GND strip
Ground pads and long ground strip identified by Adafruit near the reset button.
GroundVoltage · 0V reference
near reset button
Proto strips
Three hole-connected strips in the centre area, intended as a mini solderless proto area with cuttable traces.
Unknown
centre proto area

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