SparkFun
SparkFun Breadboard Power Supply Stick - 3.3V/1.8V
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...
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
Jargon buster
Plain-language definitions for the technical terms used above.
- DC barrel jack
- A round power connector commonly used for low-voltage DC power supplies, often described by its outer and inner diameters such as 5.5 x 2.1 mm. Matching the barrel size and polarity is important so the plug physically fits and powers the device correctly.
- Headers
- Rows of metal pins used to plug a module into a breadboard or connect it with jumper wires. Pre-soldered headers make the module easier to use straight away without needing to solder the pins yourself.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- PTC fuse
- A resettable fuse that increases its resistance when too much current flows, helping protect the board from short circuits or overloads. It matters because it can recover after a fault instead of needing replacement like a traditional fuse.
Find this product in
Power & Batteries
Prototyping & Wiring
Breadboard Power Supply Stick Schematic
Schematic · 40.1 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 529.8 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
