Use this power regulation module to provide a 5V and 3V3 power supply to your breadboard-based project. This power supply board is designed to plug into a Breadboard panel with 2 power Distribution strips. The module can be powered by a USB port or an external power supply 7-12V. The module has two independent power lines, which can be set to the output voltage of 5V or 3.3V, or completely remove power from the line.The  module has an ON / OFF switch to turn on and off module. It comes with reverse polarity and short circuit protection, which greatly helps during building and testing circuits on the breadboard.

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