Quick video showing off a HW-131 dual power supply module like I know what i'm talking about. This is the same thing as the YwRobot 545043 Breadboard Power Supply
Specifications:
Material: PCB
Input Voltage: DC6.5- or USB power-up
Output Voltage: 3.3V, 5V switchable
Max. Output Current: 700mA
Item Size: 53 * 32mm x 2.09 * 1.26in
Item Weight: 11g
Typical use : MB102 Arduino Solderless 830 point breadboard
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