Adafruit Proto Doubler PiCowbell for Pico and PicoW

The Adafruit Proto Doubler PiCowbell gives your Raspberry Pi Pico or Pico W two side-by-side socket slots — plug in your Pico on one side and a PiCowbell accessory on the other, no soldering or stacking headers required. It also adds LiPo battery charging, a power switch, reset button, STEMMA QT connector, and a prototyping area.

Each socket has a second row of pins so you can poke jumper wires directly in without breadboarding. The dual sockets are hollow, meaning you can also plug through the back using Pico Stacking Headers if needed. All pins are clearly labelled on the silkscreen.

Key Features

• Dual 2×20 Socket Headers – Pre-soldered; plug in a Pico and a PiCowbell side by side with an extra row of sockets per pin
• LiPo/Li-Ion Charging – JST PH connector with 500 mA charge rate (adjustable to 250 mA via jumper); orange LED while charging, green when complete
• Alkaline/NiMH Support – Cut a jumper to disable the charger for use with 3×AA or 3×AAA battery packs
• Power Slide Switch – Connected to Pico Enable pin to disable the 3.3V supply for low-power sleep
• Reset Button – Right-angle button at the board edge
• STEMMA QT / Qwiic Connector – JST SH for I2C on GPIO 4 (SDA) and GPIO 5 (SCL), with extra breakout holes for re-assignment
• Prototyping Area – 3-hole connected strips in the centre area, plus duplicate hole pads next to nearly every Pico pin
• Power Rails – Dedicated 3.3V and ground strips; ground pads marked with white silkscreen
• 4 Mounting Holes – For secure attachment to an underplate or enclosure
• Gold-Plated Pads – For reliable soldering

I2C Configuration

• Arduino (Philhower core) – Wire peripheral pre-configured for GPIO 4 and 5
• CircuitPython / MicroPython – Set SDA=4 and SCL=5 in code

Ideal For

• Solder-free Pico + PiCowbell projects
• Battery-powered portable Pico builds
• Prototyping with easy pin access via the extra socket row
• Combining multiple PiCowbell accessories

Package Contents

• 1× Adafruit Proto Doubler PiCowbell (assembled with dual socket headers, JST PH battery connector, slide switch, reset button, and STEMMA QT connector)