PDB - Power Distribution Board från Birdseye samt Pololu enligt nedan

2096 - Pololu 12V Step-Up/Step-Down Voltage Regulator
This switching regulator uses the SEPIC topology to produce 12 V from input voltages between 2.5 V and 18 V. The wide input range coupled with its ability to convert both higher and lower input voltages makes it useful for applications where the power supply voltage can vary greatly, as with batteries that start above but discharge below 12 V. The compact (0.4? × 0.575?) module can supply over 200 mA in typical applications.
https://www.pololu.com/product/2096

2843 - Pololu 5V, 500mA Step-Down Voltage Regulator
The compact (0.4? × 0.5?) D24V5F5 synchronous buck voltage regulator takes an input voltage of up to 36 V and efficiently reduces it to 5 V while allowing for a maximum output current of 500 mA. This regulator offers typical efficiencies between 85% and 90% and has a very low dropout, so it can be used with input voltages as low as a few hundred millivolts above 5 V. The pins have a 0.1? spacing, making this board compatible with standard solderless breadboards and perfboards.
https://www.pololu.com/product/2843