The Step-Down D24V6F9 Buck Voltage Regulator module gives the output voltage of 9V with a wide input voltage range of 11.5-42V and a maximum output current of 600 mA. Pololu 2108

The LM2596 module with an adjustable step-down converter is a versatile tool for powering and testing electronic circuits. It allows convenient voltage adjustment with precise parameter monitoring thanks to the built-in voltmeter. Ideal for prototyping, laboratory experiments, and service work.

The S7V8F3 step-up/step-down converter regulates the voltage at 3.3 V, supporting an input voltage range of 2.7 V to 11.8 V, making it ideal for battery-powered applications. With an efficiency of over 90% and protection against short circuits and overheating, it provides reliable and energy-efficient operation in a wide range of conditions. Pololu 2122

The Step-Down D24V6F12 Buck Voltage Regulator module gives the output voltage of 12V with a wide input voltage range of 15-42V and a maximum output current of 600 mA. Pololu 2109

A high-efficiency UBEC switching regulator for powering receivers and servos in RC models with 2–8 S LiPo batteries. It provides a stable voltage of 5.25 V with a load of up to 5 A, with power reserve for temporary overloads, ideal for large models requiring a reliable power source.

This synchronous switching step-down (or buck) regulator takes an input voltage of up to 40 V and efficiently reduces it to 3.3 V with an available output current of around 15 A. Pololu 2880

This synchronous switching step-down (or buck) regulator takes an input voltage of up to 40V and efficiently reduces it to 5V with an available output current of around 15A. Typical efficiencies of 80% to 95% along with its high current capabilities make this regulator well suited for powering large loads. Pololu 2881

Step-Up DC-DC converter module. It has an input voltage of 1.3 to 16 V, an output voltage of 15 V and a maximum input of up to 2 A. Pololu 4946

Step-Up converter with an output voltage of 5 to 28 V, an input voltage of 2 to 24 V and a maximum current of 2 A

DC voltage converter with adjustable and stabilised output voltage from 0.5 V to 32 V. It can handle loads up to 4 A and has an output of up to 50 W. It features a colour display and a handy user interface. Fnirsi DC/DC converter 50W

A simple DC power supply with an output voltage of 12.6 V DC and a current of 10 A. The device can be powered with a voltage of 8 to 36 V DC. It can be used to charge Li-Ion batteries, it will also work well for powering devices such as LED lighting. SparkFun PRT-18722

DC-DC Step-Up converter module with adjustable output voltage of 5 V, 8 V, 9 V or 12 V. The module can be powered with the voltage from 2.5 to 12 V, making it compatible, for example, with Lithium batteries with a nominal voltage of 3 , 7 V.

Step-Down converter with an output voltage of 5 V, input voltage from 9 to 36 V and a maximum current of 5 A. The board is equipped with a DC input connector and an output USB connector

Step Down converter module with an output voltage of 5 V and a maximum current of 2x2,5 A. The board is equipped with four USB connectors

BMS module for six Li-Ion cells with a voltage of 22.2 V. It has the function of charging, discharging and over-discharge protection. The cells can be discharged with a continuous current of up to 14 A

Power supply based on DC Step Down converter with adjustable output voltage from 0 to 16.5 V and current efficiency of 3 A. The set includes LCD display and transparent case

Step-Up DC-DC converter module. It has an input voltage of 1.3 to 16 V, an output voltage of 12 V and a maximum input of up to 2 A. Pololu 4945

Step-Down converter with an output voltage of 5 V, an input voltage of 6.5 to 16 V and a maximum current of 4 A

Shunt regulator with a constant voltage of 33V, bypass resistance 4Ohm and a total of 12 SMT shunt resistors on both sides of the PCB with the possibility of adding an external potentiometer to adjust the preset voltage. Pololu 3776