SparkFun

Breadboard Power Supply Stick 5V/3.3V with Headers

Name: Breadboard Power Supply Stick 5V/3.3V with Headers
Brand: SparkFun
SKU: SF-PRT-21297
Price: 20.65 AUD
Availability: InStock

· MPN: PRT-21297

Arduino Breadboards and Prototyping Accessories Breadboards Prototyping Arduino Power Supplies and Voltage Regulators Voltage Regulators & Converters

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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, ...

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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.
GND: GND is the ground or reference connection (0 V) for a circuit. When connecting two devices together, their grounds must be joined so both agree on what counts as a low or high signal.
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.
VCC: VCC is the positive power-supply connection on a chip or module. Connecting it to the correct supply voltage is needed for the part to power on and helps avoid damaging the electronics.