功能

• Here is a very simple breadboard power supply kit that takes power from a DC wall wart and outputs a selectable 5V or 3.3V regulated voltage. The .1" headers are mounted on the bottom of the PCB for simple insertion into a breadboard. Pins labeled VCC and GND plug directly into the power lines. The lone pair of pins have no electrical connection but support the PCB.
• There are two pins available within the barrel jack footprint. Any stripped +/- DC supply can be connected instead of the barrel connector. Board has both an On/Off switch and a voltage select switch(3.3V/5V).
• Comes as a bag of parts kit and is easily assembled if you can follow the silkscreen indicators and have beginning experience with a soldering iron. You will need to read the resistor bands or a multimeter to determine the resistor sizes.
• Dimensions:1.25x1.25"
• Kit Includes:DC Barrel Connector(2.1mm center positive)
• TO-220 Voltage Regulator(LM317 1.5A max current)
• 1N4004 Reverse Protection Diode
• 100uF 25V Capacitor
• 10uF 25V Capacitor
• 0.1uF 50V Capacitor
• Red Power LED - High Brightness
• 2×SPDT Slide Switch
• 4×0.1" Header Pins
• 2×330 Resistor 1/6W
• 390 Resistor 1/6W
• 240 Resistor 1/6W
• Bare PCB with Silkscreen Indicators
• PTC resettable f