MyoWare 2.0 Power Shield - power module for the muscle tension sensor

Step-Up/Step-Down DC-DC converter module that converts an input voltage from 3 V to 16 V to a voltage in the range of 2.5 V to 9 V. It has a current capability of up to 2 A. SparkFun COM-15208

The very small step-down 6 V, 2.5 A synchronous inverter can be supplied with voltage up to 36 V, dimensions: 17.8 mm x 17.8 mm. Pololu 2859

Step-Up converter U3V70A with an output voltage from 4.5 to 20 V, an input voltage from 2.9 to VOUT and a maximum output current of 10 A. Pololu 2890

The Step-Up Buck Voltage Regulator module with output voltage of 3.3V and input voltage range of 1-3V and a maximum output current of 200 mA. STMicroelectronics EVAL4971

Step-Up converter U3V70F15 with an output voltage of 15 V, an input voltage from 2.9 to 15 V and a maximum output current of 10 A. Pololu 2896

Step-Down XL4005 converter module with adjustable output voltage in the range from 0.8 to 30 V with a wide input voltage range from 4.5 to 30 V and a maximum output current of 5 A

The Step-Down D24V3F12 Buck Voltage Regulator module gives the output voltage of 12V with a wide input voltage range of 14.5-42V and a maximum output current of 300 mA. Pololu 2100

ST1PS01AJR evaluation module for testing the 1.9–2.8 V low-power step-down converter. STMicroelectronics STEVAL-1PS01AJR

The MEAN WELL IRM-20-3.3 is a reliable 3.3 V AC/DC power supply module with comprehensive protections, designed for PCB integration in electronic devices. Suitable for applications requiring compact design and stable low-voltage power output.

DC-DC Step-Up/Step-Down Converter Module. It has an input voltage of 1.4 to 16 V, an output voltage of 9 V and a maximum output current to 1 A. Pololu 4968

An efficient step-down converter that reduces the input voltage to 3.3 V at a maximum current of 100 mA, offering high efficiency due to low quiescent current (<20 μA). It supports input voltages from 3.3 V to 65 V, has a Power Good (PGOOD) function, an EN input for system shutdown, and short circuit and overheat protection, making it a reliable and energy-efficient solution. Pololu 5372

Step-Down converter with adjustable output voltage from 4.2 V to 15 V and output voltage up to 45 V. It is equipped with reverse voltage protection, input undervoltage lockout, overload and short circuit protection. Pololu 4855

Step-Down converter with adjustable or constant output voltage from 0.8 to 17 V, input voltage from 4.5 to 24 V and a maximum current of up to 3 A

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

XL6009E1 Step-Up converter with an output voltage of 1.23 to 30 V, an input voltage of 4 to 35 V and a maximum current of up to 3 A

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