A very convenient option to supply power in projects on breadboards from an independent source other than a microcontroller. Voltage regulation with a jumper, a on-off button switch, USB socket for power supply and a DC power supply socket make this product indispensable in the tray of any electronics. Specification: Output voltage: 3.3 V or 5V - a different voltage can be set on each rail Installed button - on / off LED indicating power USB type A output for 5V power supply for other systems DC input 2.1 x 5.5 mm for connecting 6.5V - 12V power supply https://elecena.pl/product/22620830/hw-131-power-module-for-arduino-breadboards-pcb-3-3v-5v 2023-02-22 https://elecena.pl/product/22620830/hw-131-power-module-for-arduino-breadboards-pcb-3-3v-5v 2024-03-12 https://elecena.pl/product/22620830/hw-131-power-module-for-arduino-breadboards-pcb-3-3v-5v 2025-10-25 https://elecena.pl/product/22620830/hw-131-power-module-for-arduino-breadboards-pcb-3-3v-5v 2025-10-29