See this cool little thing? This Breadboard Power Supply will make the best out of your standard breadboard! Using its built-in voltage regulator, it can convert a 6.5-12V input from a DC power jack or a 5V USB to standard 3.3V or 5V. You can select the voltage mode using a jumper cap on-board. Additionally, It has a reverse-polarity protection series diode that will prevent your components from burning. It is also small enough to fit all standard breadboards available in the market.