The SparkFun Breadboard Power Supply Stick provides clean, regulated 3.3 V or 1.8 V power directly to your breadboard. It accepts 4–9 V input via a DC barrel jack or 2-pin header, and outputs regulated voltage through pins spaced to power both rails of a standard full-size breadboard simultaneously.

The board includes an on/off switch, a voltage select switch (3.3 V / 1.8 V), a power status LED, and PTC fuse protection. All headers are 0.1″ pitch for direct breadboard insertion.

Key Features

• Selectable Output – Switch between 3.3 V and 1.8 V regulated output
• 4–9 V Input – Via 5.5 × 2.1 mm centre-positive barrel jack or 2-pin header
• 800 mA Operating Current – Sufficient for most breadboard projects
• On/Off Switch – Convenient power control without disconnecting
• PTC Fuse Protected – Resettable fuse guards against overcurrent
• Power Status LED – Visual confirmation of active power output
• Dual Rail Power – Pin spacing powers both breadboard power buses at once

Specifications

• Input Voltage – 4–9 V
• Output Voltage – 3.3 V or 1.8 V (selectable)
• Max Current – 800 mA
• Barrel Jack – 5.5 × 2.1 mm, centre positive
• Dimensions – 54.6 × 16.5 mm (2.15 × 0.65″)

Ideal For

• Powering 3.3 V or 1.8 V circuits on breadboards
• Prototyping with low-voltage sensors and microcontrollers
• Replacing battery packs with clean regulated power

Resources

• Schematic (PDF)
• Eagle Files (ZIP)
• GitHub – Design Files