The CH34X family comprises widely used USB‑to‑serial chips manufactured by WCH (WinChipHead), commonly integrated into generic UNO R3, ESP8266, and ESP32 development boards.
Overview
Lonely Binary Logic Level Converter Kit – Reliable Voltage Shifting
Effortlessly connect 3.3V and 5V devices with the Lonely Binary Bi-Directional Logic Level Converter. Perfect for MCUs and sensors, this lead-free kit with an Immersion Gold Black Matte Finish ensures reliable performance.
What's in the box
- 18 x Two-Channel Logic Level Converters: For I2C (SCL, SDA) and similar dual-signal applications.
- 6 x Four-Channel Logic Level Converters: For SPI (MOSI, MISO, SCLK, CS) and multi-signal applications.
- 3 x Six-Channel Logic Level Converters: For LCDs and high-density signal applications.
- Read More...
What’s in the Box
- 1 x TTL Converter Module

Logic Level Converter Bi-Directional
$19.99
Projects
HC-05 Bluetooth Module and Arduino Beginner Tutorial
This is a basic example to get you start with HC-05 Bluetooth Module. Depending on your specific requirements and the functionality you want, you may need to expand and modify the sketch accordingly.
Continue Reading