SparkFun
Breadboard Power Supply Stick 5V/3.3V with Headers
· MPN: PRT-21297
This compact regulator board makes it easy to power breadboard projects from a 6-12V supply. It provides a selectable regulated output of either 5V or 3.3V, ...
This compact regulator board makes it easy to power breadboard projects from a 6-12V supply. It provides a selectable regulated output of either 5V or 3.3V, making it handy for quick prototyping with common microcontrollers, sensors and logic circuits.
Input power can be supplied through the DC barrel jack or the two-pin header labelled + and -. Output power is available on the pins labelled GND and VCC, with an onboard ON/OFF switch and a separate voltage select switch for choosing 3.3V or 5V.
The 0.1" pitch headers suit direct insertion into a breadboard. The two sets of four GND and VCC holes are spaced so that, when connected to SparkFun's Basic Breadboard, both power buses are powered. Documentation includes the schematic, Eagle files, an unregulated power supply tutorial and design files.
Features:
- 6-12V input voltage via barrel jack or 2-pin header
- 3.3V or 5V regulated output voltage
- ON/OFF switch
- Output voltage select switch
- Power status LED
- PTC fuse protected power
- 0.1" pitch headers for simple insertion into a breadboard
- Two sets of four GND and VCC holes spaced to power both buses on a Basic Breadboard
Specifications:
- Input voltage: 6-12V input voltage via barrel jack or 2-pin header
- Output voltage: 3.3V or 5V regulated output voltage
- Operating current: 800mA Operating Current
- Header pitch: 0.1"
- Barrel jack: 5.5x2.1mm center positive barrel jack
- Dimensions: 2.15x0.65"
A straightforward power stick for breadboard experiments where you need a quick, selectable 3.3V or 5V rail.
Jargon buster
Plain-language definitions for the technical terms used above.
- center positive
- Center positive describes the polarity of a barrel-style DC power plug, where the centre pin is positive and the outer sleeve is negative. Using a power supply with the wrong polarity can stop the board from working or damage it.
- 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
Arduino
Prototyping & Wiring
Breadboard Power Supply Stick Schematic
Schematic · 40.6 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 467.5 KB · Click any page to view full size
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