# USB to TTL CH340G programmer module, 3.3/5V

> USB to TTL programmer module with CH340G chip, selectable logic voltage of 3.3V or 5V via jumper. Suitable for programming Arduino Pro Mini boards (3.3V/5V), with TXD, RXD, GND connections and power supply from USB 5V (Type A male connector). No DTR pin, reset must be done manually via button. Dimensions: 51.5 x 18mm. May be incompatible with the 2023 CH340 driver.

- Page: https://sigmanortec.ro/en/usb-to-ttl-ch340g-programmer-module-33-5v
- Price: 7.44 RON
- Availability: In stock; 1-2 zile
- Reference: 9002 · EAN: 5943736178009
- Category: Mechatronics and IoT > Programming
- Specifications: Output Voltage: 3.3 V / 5 V; Output Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.
- Package (shipping data): 0.005 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:32 (Europe/Bucharest)

## Description

USB to TTL converter with CH340G, ideal for programming Arduino Pro Mini 3.3V or 5V boards. Offers selectable logic voltage 3.3V or 5V via jumper, stable TXD RXD GND connections and simple power supply from USB 5V. Reset is done manually, compact format for quick integration on the workbench.
The serial converter module with integrated CH340G and selectable logic voltage between 3.3V and 5V, make it ideal for programming Pro Mini development boards (3.3V and 5V).
Selection of the logic voltage is done by repositioning the jumper.
The board may be incompatible with the latest version of the CH340 driver (2023). Download the driver from the Download section.