SparkFun
Breadboard Power Supply Kit 5V/3.3V
Power your breadboard projects with ease using the SparkFun Breadboard Power Supply Kit. This kit transforms a DC wall wart into a stable, selectable 5V or 3.3V regulated output, ideal for sensitive circuits. It features an On/Off switch and voltage selection for convenient control. The integrated .1" headers plug directly into your breadboard's power rails, simplifying connections. Designed for hobbyists, this kit requires soldering and assembly, offering a hands-on learning experience while providing reliable power for prototyping.
$12.50
Owner Satisfaction
4.4
/ 5
Category Rank
11
/ 13
#11 in Circuit Prototyping
Price vs Category Average
+28%
Above average
Output Voltage
53.3
/ Selectable V or V
Who it's for
- Dual Voltage Output
- Direct Breadboard Integration
- Standard Input Compatibility
Who should skip it
- Requires Soldering
- Limited Current Output
- Heat Generation
Key Specs
Output Voltage
Selectable 5V or 3.3V
Maximum Current
1.5A max current (LM317 regulator)
Input Connector
DC Barrel Connector (2.1mm center positive)
Regulator
TO-220 Voltage Regulator (LM317)
Protection
1N4004 Reverse Protection Diode
Mounting Type
Breadboard insertion
Packaging
Bag of parts kit
Recommended Power Supply
9VDC 650mA Wall Adapter
Features
- Selectable 5V/3.3V output
- Direct breadboard power rail connection
- Includes On/Off switch
- Reverse protection diode included
- Uses LM317 regulator for high current
- Kit requires soldering and assembly
- Accepts DC barrel connector input
- Provides clean, regulated power
What customers say
This Sparkfun power supply kit is highly valued by hobbyists for its compact convenience and dual voltage output. Users appreciate having stable 5V and 3.3V rails directly on the breadboard, simplifying prototyping and reducing external clutter. The kit format provides a positive, hands on learning experience with quality components. Reliability after assembly is consistently strong. The primary consideration is its modest current capacity, which is sufficient for standard circuits but limits use with power hungry components. Overall, it offers excellent foundational functionality and educational value, making it an essential, well regarded piece of lab equipment.
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