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...
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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 connector contacts on a fixed pitch (commonly 2.54 mm) used to link a board to a breadboard, jumper wires, or another board. They come as male pin headers and female socket headers; when a module ships with pre-soldered headers it can be used straight away, whereas bare pads require soldering the pins yourself.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- 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
Source Code
Open-source libraries, firmware & example projects for this product
Breadboard_Power Supply Stick_3.3V/1.8V available from SparkFun Electronics.
e20de09
over 11 years ago
· 12 commits
- Hardware Fixing merge conflicts, updating README over 11 years ago
- Production Fixing merge conflicts, updating README over 11 years ago
- .gitattributes Updating to current board files almost 12 years ago
- .gitignore Updating to current board files almost 12 years ago
- README.md Fixing merge conflicts, updating README over 11 years ago
Related Tutorials
Free guides on learn.littlebird.com.au
