0-5V to 0-20mA voltage-current converter

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

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

This tiny logic level shifter features four bi-directional channels, allowing for safe and easy communication between devices operating at different logic levels. Pololu - 2595

8-bit Bidirectional Voltage Converter

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

BOB-11771 Voltage-Level Translator - TXB0104 Breakout

Module with a voltage divider. Equipped with a Grove connector, it allows the input voltage to be reduced by 3 or 10 times. Seeed Studio 104020000

BOB-12009

4-channel converter of voltage levels 3.3V/5V that allows you to connect systems operating at a lower voltage to those powered by a higher voltage

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

4-channel converter of logic levels allowing for connection of systems operating with voltage levels of 1.8 V, 2.5 V, 3.3 V and 5 V. DFRobot DFR0843

A module with a set of resistors and mechanical switches that allows you to adjust the resistance in the range from 0 to 999990 Ω. SparkFun KIT-13006

The SN74LVC1T45DRLR from Texas Instruments is a single-channel, bidirectional voltage level translator, covering a range from 1.65 V to 5.5 V, ideal for signal conversion in microprocessor systems and mobile devices. With automatic detection of the transmission direction and a compact SMD SOT-5X3 package, the device is easy to implement and works well in limited mounting spaces.

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

Module with a voltage level converter 3.3 V - 5 V intended for use in the Qwiic system. It has a built-in Step Up converter providing power supply with a voltage of 5 V and a current of up to 100 mA. SparkFun SPX-17238

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