Decade Resistance Box - a module for regulating the resistance

A module enabling the conversion of input voltage in the range from 1.8 V to 5.3 V into the appropriate negative output voltage. It offers high efficiency in excess of 80%, making it ideal for applications where a lower power negative supply is required, such as biasing sensors or op-amp circuits. Pololu 2839

Bi-directional 8-channel logic level converter module (1.2-3.6V to 1.7-5.5V) based on TXS0108 chip.

8-channel Bi-directional Logic Level Converter - TXB0108, RoHS

8-channel voltage level converter module with an input voltage of 12 V and an output voltage of 3.3 V. Unidirectional, based on resistor dividers. Numato Lab NLVD00008

Module designed to filter electrical signals. It uses an LC filter, which consists of a coil and a capacitor, to eliminate noise and unwanted components from the electrical signal. It can filter signals with voltages up to 30 V and currents up to 3 A

The KAmod Level Shift x4 module is a logic level converter that enables the connection of electronic systems powered by different voltages, such as 5 V and 3.3 V. The module provides four bidirectional channels that can operate with digital signals ranging from 1.8 V to 5 V. It is an excellent choice for level conversion in I2C bus applications.

3V/5V voltage level converter module with built-in Step-Up converter. Allows development boards operating at 3V to be connected to a device requiring a higher operating voltage of 5V for I2C communication. Adafruit 5649

8-bit voltage level converter with TXB0108 integrated circuit. It acts as a bridge between applications with different source voltages and input and output voltage levels. SB Components 21772

Module with a bidirectional converter for the I2C bus, based on the PCA9306 system. It allows you to connect two I2C modules operating with different voltage levels. SparkFun BOB-15439

8-channel voltage level converter allowing for connection of systems operating with the voltage level of 1.8 V, 2.5 V, 3.3 V and 5 V. SparkFun BOB-19626

Analog voltage divider module. It enables a 5-times reduction of the input voltage. DFRobot DFR0051