# Adapters and Converters

> USB adapters, ESP-01/ESP8266 modules, I2C logic level converters, 4-20mA signal and voltage/current converters

- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Category page: https://sigmanortec.ro/en/adapters-and-converters
- Category: Mechatronics and IoT > Adapters and Converters
- Prices: RON, VAT included; prices and stock as of 2026-10-22 00:53 (Europe/Bucharest)

## Subcategories

- [Interface and Logic Level Converters](https://sigmanortec.ro/en/llms/c/145.md): Modules for logic level shifting, I2C interfacing, current-to-voltage and optocoupled isolation between 3.3V, 5V, 12V (12 products)

## Products (21)

### MicroUSB to Type-C converter
- Page: https://sigmanortec.ro/en/microusb-to-type-c-converter
- Details: https://sigmanortec.ro/en/llms/p/124.md
- Price: 5.81 RON
- Availability: In stock; 1-2 zile
- Reference: 33515 · EAN: 5941283002181

MicroUSB to Type-C converter (reference 33515) with MicroUSB input and Type-C output. Allows connecting cables and accessories with a MicroUSB connector to devices with a Type-C port, for charging or connection, without replacing existing cables. Compact design, plug and play connection. Finish is white or black, depending on batch.

### ESP-01, ESP8266 adapter module
- Page: https://sigmanortec.ro/en/esp-01-esp8266-adapter-module
- Details: https://sigmanortec.ro/en/llms/p/321.md
- Price: 4.60 RON
- Availability: In stock; 1-2 zile
- Reference: 33579 · EAN: 5941636951067

The adapter for ESP-01, ESP8266 simplifies prototyping and rapid integration into IoT projects, provides a stable interface for programming and testing, has easily accessible pins for connection to a breadboard, includes support for 3.3V power supply and UART serial signals, is compact and robust for use in the laboratory or production.
The PCB adapter for ESP-01 and ESP-01S is the perfect solution for quick integration of ESP8266 WiFi modules into breadboard projects. The device offers a stable interface for programming and testing, with easily accessible pins for direct connection to a standard breadboard, and includes support for 3.3V power supply and UART serial signals.

### Adapter module for ESP-01, ESP8266, 5V/3.3V
- Page: https://sigmanortec.ro/en/adapter-module-for-esp-01-esp8266-5v-33v
- Details: https://sigmanortec.ro/en/llms/p/322.md
- Price: 10.14 RON
- Availability: In stock; 1-2 zile
- Reference: 33508 · EAN: 5940986046218

Allows quick connection of an ESP-01 ESP8266 to Arduino and other 5V logic boards, providing stable power supply through integrated 3.3V regulator and logic level conversion on the board. Operates at 4.5–5.5V DC input, supports current up to 240mA, ensures increased compatibility in IoT projects and prototyping through simple module assembly.
Adapter module for the ESP-01 WiFi board, ESP8266, with 5V power supply thanks to the presence on the board of a 3.3V voltage regulator (the operating voltage of the ESP-01), compatible with Arduino and other development boards.

### USB 2.0 adapter module, Female
- Page: https://sigmanortec.ro/en/usb-20-adapter-module-female
- Details: https://sigmanortec.ro/en/llms/p/323.md
- Price: 2.66 RON
- Availability: In stock; 1-2 zile
- Reference: 33518 · EAN: 5949803488705

USB 2.0 adapter module, Female (ref. 33518), with a USB 2.0 female connector mounted on the module. The wiring is broken out to 4 pins with standard 2.54 mm pitch, easy to integrate on breadboard or PCB. Provides direct access to the VBUS (5V), D+, D-, GND lines, useful for prototyping and USB interfacing.

### USB 2.0 adapter module, Tata
- Page: https://sigmanortec.ro/en/usb-20-adapter-module-tata
- Details: https://sigmanortec.ro/en/llms/p/324.md
- Price: 2.66 RON
- Availability: In stock; 1-2 zile
- Reference: 33520 · EAN: 5940502392768

USB 2.0 adapter module with male connector, reference 33520. Converts USB signals into 4 pins with standard 2.54 mm pitch, providing access to VBUS (5V), D+, D- and GND. Suitable for integrating a USB cable into electronic projects, prototyping, testing and interfacing with modules on a board or breadboard.

### USB 3.0 adapter module, Female
- Page: https://sigmanortec.ro/en/usb-30-adapter-module-female
- Details: https://sigmanortec.ro/en/llms/p/325.md
- Price: 4.04 RON
- Availability: In stock; 1-2 zile
- Reference: 33519 · EAN: 5941692239628

USB 3.0 adapter module, Female, with a USB 3.0 female connector mounted on the board. The USB wiring is broken out to 9 pins at the standard 2.54 mm pitch, compatible with breadboards and perforated boards. It allows quick connection of a USB 3.0 cable to an electronic circuit, useful for prototyping. Reference: 33519.

### Logic Level Translator Module, I2C, IIC, bidirectional, 4 channels, 3.3-5V
- Page: https://sigmanortec.ro/en/logic-level-translator-module-i2c-iic-bidirectional-4-channels-33-5v
- Details: https://sigmanortec.ro/en/llms/p/454.md
- Price: 3.11 RON
- Availability: In stock; 1-2 zile
- Reference: 22200 · EAN: 5947638727310
- Specifications: Supply Voltage: 3.3; Maximum Input Voltage: 5

Bidirectional I2C/IIC logic level translator module with 4 channels, operating between 3.3V and 5V. Enables safe communication between devices with different logic levels, providing fast conversion between 5V and 3.3V. Compatible with Arduino and other development boards, compact and easy to integrate on breadboards or in industrial setups.

### I2C IIC bidirectional logic level translator module 8 channels 3.3V 5V TXS0108E
- Page: https://sigmanortec.ro/en/i2c-iic-bidirectional-logic-level-translator-module-8-channels-33v-5v-txs0108e
- Details: https://sigmanortec.ro/en/llms/p/455.md
- Price: 5.69 RON
- Availability: In stock; 1-2 zile
- Reference: 33138 · EAN: 5945267532138
- Specifications: Supply Voltage: 3.3; Maximum Input Voltage: 5

Bidirectional 8-channel logic level translator module based on the TXS0108E (CJMCU 0108), used to interface boards and sensors with different logic levels over I2C IIC or GPIO lines. Automatically converts the signal between 3.3V and 5V, with no direction control needed. VCCA connects to 3.3V, VCCB to 5V, and GND is shared between the two supplies. Input voltage: 3.3V-5V.

### Frequency to Voltage converter module, 0-1KHz to 0-10V, 13.5-30V
- Page: https://sigmanortec.ro/en/frequency-to-voltage-converter-module-0-1khz-to-0-10v-135-30v
- Details: https://sigmanortec.ro/en/llms/p/1747.md
- Price: 17.51 RON
- Availability: In stock; 1-2 zile
- Reference: 9637 · EAN: 5946080740922
- Specifications: Supply Voltage: 13.5 V; Maximum Input Voltage: 30 V; Output Voltage: 0 - 10 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Output Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Frequency to Voltage converter module (ref. 9637), converts a 0-1KHz pulse signal into a proportional 0-10V analog voltage. Powered by 13.5-30V DC, optically isolated input, output adjustable via potentiometer. Accepts pulse levels 5V, 12V, 24V. Response time approximately 0.3-0.5 s. Suitable for pulse sensors, encoders and PLC interfacing with common ground.

### Signal converter 2IN, 4OUT, 4-20mA Input, 4-20mA Output, 24VDC
- Page: https://sigmanortec.ro/en/signal-converter-2in-4out-4-20ma-input-4-20ma-output-24vdc
- Details: https://sigmanortec.ro/en/llms/p/1975.md
- Price: 261.90 RON
- Availability: In stock; 1-2 zile
- Reference: 88012 · EAN: 5947531137094
- Specifications: Input Voltage: 24VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Industrial signal converter (ref. 88012) that distributes two analog 4-20mA signals to four isolated 4-20mA outputs (grouped in pairs). Powered by 24VDC, with galvanic isolation between input and output, accuracy 0.1% FS, response time 

### Signal converter 1IN, 4OUT, 4-20mA Input, 4-20mA Output, 24VDC
- Page: https://sigmanortec.ro/en/signal-converter-1in-4out-4-20ma-input-4-20ma-output-24vdc
- Details: https://sigmanortec.ro/en/llms/p/2172.md
- Price: 217.41 RON
- Availability: In stock; 1-2 zile
- Reference: 88001 · EAN: 5946505856665
- Specifications: Input Voltage: 24VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Industrial signal converter (ref. 88001) that distributes a single 4-20mA analog input signal to 4 galvanically isolated 4-20mA outputs, eliminating ground loops and interference. Accuracy 0.1% FS, response time 

### Logic level converter module, with optocoupler, 4 channels, PC817, 3.3-30V
- Page: https://sigmanortec.ro/en/logic-level-converter-module-with-optocoupler-4-channels-pc817-33-30v
- Details: https://sigmanortec.ro/en/llms/p/1679.md
- Price: 10.85 RON
- Availability: In stock; 1-2 zile
- Reference: 9566 · EAN: 5940106562659
- Specifications: Supply Voltage: 3.3 VDC; Maximum Input Voltage: 30 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Logic level converter module with PC817 optocoupler, 4 independent channels, each with status LED and jumper for common ground or full isolation. Input voltage 3.3-24VDC, controlled output voltage 3.3-30VDC, maximum frequency 4KHz per channel, maximum current 50mA. Dimensions 48 x 38mm. Compatible with Arduino and other development boards, used for isolated control of relays and digital inputs.

### 3.5 mm audio jack adapter, male to dual female, splitter
- Page: https://sigmanortec.ro/en/35mm-audio-jack-adapter-male-to-double-female-splitter
- Details: https://sigmanortec.ro/en/llms/p/1716.md
- Price: 9.11 RON
- Availability: In stock; 1-2 zile
- Reference: 9608 · EAN: 5944620657419

Allows separation of audio and microphone signals for use with a TRRS jack headset on devices with dedicated inputs, offers 3.5 mm male jack to 2 3.5 mm female jacks, pink colored connections for microphone and green for headphones or speaker, compatible with PC, laptop, smartphone and speakers, short 14 cm cable for easy connection.
The audio splitter adapter divides the signal from a 3.5 mm jack port with 4 contacts into two separate paths, one for headphones or speakers and one for the microphone. It is useful when a headset or a pair of headphones with a microphone has two separate 3.5 mm plugs, while the device has a single combined port.

### Current to voltage converter module, 0-20mA to 0-10V
- Page: https://sigmanortec.ro/en/current-to-voltage-converter-module-0-20ma-to-0-10v
- Details: https://sigmanortec.ro/en/llms/p/2041.md
- Price: 12.75 RON
- Availability: In stock; 1-2 zile
- Reference: 9843 · EAN: 5943253369775
- Specifications: Minimum Output Voltage: 0; Maximum Output Voltage: 10; Output Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Converts 0-20mA or 4-20mA current signal into selectable 0-3.3V, 0-5V or 0-10V voltage, ideal for industrial sensors and integration with Arduino or STM. Offers stable transmission over long distances, high-precision sampling resistor with low drift, fine calibration via ZERO and SPAN potentiometers, wide 7-36V power supply and reverse polarity protection.
Current-voltage conversion module, designed to convert the current signal of 0-20mA or 4-20mA into a variable voltage signal between 0-3.3V, 0-5V or 0-10V.

### Logic level converter module, 3V3 IN, 5V OUT, Common Cathode, PNP
- Page: https://sigmanortec.ro/en/logic-level-converter-module-3v3-in-5v-out-common-cathode-pnp
- Details: https://sigmanortec.ro/en/llms/p/1639.md
- Price: 32.75 RON
- Availability: In stock; 1-2 zile
- Reference: 9524 · EAN: 5949566680071
- Specifications: Input Voltage: 3.3 V; Output Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Output Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Logic level converter module (ref. 9524), converts signals from 3.3V to 5V, with common cathode and PNP connection. It has 4 channels, optical isolation and switches up to 10 kHz. Requires a 5VDC supply on VCC/GND and connects via screw terminals. Compatible with Arduino and other development boards.

### Logic level converter module, 3V3 IN, 12V OUT, Common Cathode, PNP
- Page: https://sigmanortec.ro/en/logic-level-converter-module-3v3-in-12v-out-common-cathode-pnp
- Details: https://sigmanortec.ro/en/llms/p/1640.md
- Price: 30.19 RON
- Availability: In stock; 1-2 zile
- Reference: 9525 · EAN: 5949806820649
- Specifications: Input Voltage: 3.3 V; Output Voltage: 12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Output Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Logic level converter module with 4 channels, from 3.3V to 12V, optoisolated, PNP input with common cathode. Powered by 12VDC on VCC and GND, connection via screw terminal. Maximum switching frequency 10KHz. A High signal of 3.3V on the input corresponds to 12V on the output, while Low (0V) corresponds to 0V on the output. Compatible with Arduino and other development boards.

### Logic level converter module, 5V IN, 3V3 OUT, Common Cathode, PNP
- Page: https://sigmanortec.ro/en/logic-level-converter-module-5v-in-3v3-out-common-cathode-pnp
- Details: https://sigmanortec.ro/en/llms/p/1641.md
- Price: 30.19 RON
- Availability: In stock; 1-2 zile
- Reference: 9526 · EAN: 5941128083412
- Specifications: Input Voltage: 5 V; Output Voltage: 3.3 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Output Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

4-channel logic level converter module for adapting 5V signals to 3.3V, featuring optical isolation, common cathode PNP scheme and screw terminal connection. Stable switching up to 10kHz. Requires 3.3VDC supply on VCC and GND pins. Compatible with Arduino and other 3.3V development boards.

### Logic level converter module, 5V IN, 12V OUT, Common Cathode, PNP
- Page: https://sigmanortec.ro/en/logic-level-converter-module-5v-in-12v-out-common-cathode-pnp
- Details: https://sigmanortec.ro/en/llms/p/1642.md
- Price: 32.74 RON
- Availability: In stock; 1-2 zile
- Reference: 9527 · EAN: 5941212411008
- Specifications: Input Voltage: 5 V; Output Voltage: 12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Output Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Logic level converter module with 4 channels, converts 5V signals to 12V (DC), featuring optoisolation, common cathode PNP connection and screw terminals. Switches up to 10 kHz, requires 12VDC supply on VCC and GND, compatible with Arduino and other development boards. Used to drive relays, solenoid valves or industrial inputs.

### Current to voltage converter module, 0-20mA to 0-5V, LM358
- Page: https://sigmanortec.ro/en/current-to-voltage-converter-module-0-20ma-to-0-5v-lm358
- Details: https://sigmanortec.ro/en/llms/p/974.md
- Price: 13.15 RON
- Availability: Out of stock
- Reference: 9163 · EAN: 5941154040731
- Specifications: Minimum Output Voltage: 0; Maximum Output Voltage: 5

Converts 0-20mA current signal into a proportional voltage 0-5V, ideal for interfacing industrial sensors with ADC inputs or microcontrollers. Uses LM358 for stable conversion, operates at 10-30V, includes potentiometer for precise output calibration, operates between -25 and 85C.
The module for converting current (IV) between 0 and 20mA to voltage between 0 and 5V. It converts a current into a proportional voltage.
For example, applying a current of 20mAh to the input will produce a voltage of 5VDC at the output, applying a current of 4mA will produce an output voltage of 1V. The potentiometer is used to adjust the output voltage.
Specifications:
Integrated: LM358
Supply voltage: 0-30V …

### TLP281 optocoupler module, 4 channels
- Page: https://sigmanortec.ro/en/tlp281-optocoupler-module-4-channels
- Details: https://sigmanortec.ro/en/llms/p/975.md
- Price: 9.11 RON
- Availability: In stock; 1-2 zile
- Reference: 9164 · EAN: 5947155375377

4-channel optocoupler module based on TLP281 (Toshiba), providing galvanic isolation between INPUT and OUTPUT. INPUT voltage 3V/5V, maximum HVCC voltage 24VDC, maximum current draw 500mAh, output current equal to HVCC/5.1K. Compatible with Arduino and other development boards, suitable for safely controlling motors, relays or servomotors. Dimensions 25 x 24mm, weight 5g.

### Expansion board ESP8266, ESP-07, ESP-08, ESP-12E
- Page: https://sigmanortec.ro/en/expansion-board-esp8266-esp-07-esp-08-esp-12e
- Details: https://sigmanortec.ro/en/llms/p/951.md
- Price: 4.43 RON
- Availability: In stock; 1-2 zile
- Reference: 9140 · EAN: 5945733807661

Male pin mounting board for ESP8266 ESP-07, ESP-08, ESP-12E modules, ideal for rapid prototyping and easy integration into IoT projects. Provides correct pin alignment, stable connections on breadboard or PCB, easy access to module signals and reduces the risk of wrong soldering, making it suitable for development and testing.
Mounting plate for ESP8266 with male pins.