Step-Up/Step-Down converter module based on the S13V15F5 system. It has an input voltage from 2.8 to 22 V and an output voltage of 5 V. The current efficiency of the converter is up to 2 A. Pololu 4084

BMS module for three Li-Ion cells with a voltage of 11.1 V. It has the function of charging with a balancer, discharging and over-discharge protection. The cells can be charged with a continuous current of up to 12 A

The protection circuit for one Li-Ion cell with a voltage of 3.7 V. It has the function of charging, discharging and over-discharge protection. The cells can be discharged with a continuous current of up to 6 A

DFR0379

A handy way to power 12V powered devices with a center-positive 2.1mm DC barrel jack from a USB port. Adafruit 2778

BMS system for three Li-Ion cells with a voltage of 12 V. It has the function of charging with balancer, discharging and over-discharge protection. The cells can be charged with continuous current up to 60 A and discharged with current up to 80 A

Pololu 5V Step-Up Voltage Regulator U1V10F5

The Step-Down D24V6F3 Buck Voltage Regulator module gives the output voltage of 3.3V with a wide input voltage range of 4.8-42V and a maximum output current of 600 mA. Pololu 2106

DC-DC Step Down converter module with input voltage from 7 to 24 V and output voltage of 5 V. Can supply currents up to 4 A. DFRobot DFR0831

Step-Up DC-DC converter module. It has an input voltage of 1.3 to 16 V, an output voltage of 3.3 V and a maximum input of up to 2 A. Pololu 4940

DC-DC Step-Up converter U3V40F7 with an output voltage of 7.5 V, an input voltage of 1.3 to 7.5 V and a maximum output current of 4 A. Pololu 4014

Step-Up/Step-Down converter module based on the S13V10F5 system. It has an input voltage from 2.8 to 22 V and an output voltage of 5 V. The current efficiency of the converter is up to 1 A. Pololu 4083

Step-Up/Step-Down converter module based on the S13V20F5 system. It has an input voltage from 2.8 to 22 V and an output voltage of 5 V. The current efficiency of the converter is up to 2,5 A. Pololu 4085

Pololu 2833

Step-Down converter with an output voltage of 5 V, input voltage from 4.5 to 40 V and a maximum current of 2 A. The board is equipped with a segment LED display and a USB output

Safety system for two Li-Ion cells with 11.1V. The module has the function of charging cells with the balancer, discharging and the function of protecting the cells against discharge. Cells can be charged with continuous current up to 20A and discharged with current 40A. modBMS40A

Step-Up DC-DC converter module. It has an input voltage of 1.3 to 16 V, an output voltage of 7.5 V and a maximum input of up to 2 A. Pololu 4943

Step-up DC-DC converter module based on the LM2587 circuit, input voltage 3.5..30V, regulated output voltage 4..30V. The module is equipped with ARK connectors

The protection circuit for one Li-Ion cell with a voltage of 3.2 V. It has the function of charging, discharging and over-discharge protection. The cells can be discharged with a continuous current of up to 12 A

The Step Down DC-DC converter module (MP2307) allows to obtain 0.93..18V output voltage at 4.75..24V input voltage. The output voltage is regulated by a potentiometer