Ch341a V 118 May 2026

Great for the price, but the voltage issue on v1.18 makes it a “buyer beware”. If you can get a v1.5 or add a regulator, it’s 4.5/5.

CH341A v1.18 typically refers to a specific, legacy version of the software used with the CH341A USB programmer, a widely used tool for flashing BIOS chips, EEPROMs, and SPI flash memory. While newer software versions like v1.29 and v1.34 are common, version

is often sought for its specific compatibility with older Windows systems or certain Winbond chips. Win-Raid Forum Hardware Overview

The CH341A is a low-cost USB interface chip that emulates UART, I2C, and SPI communication. It is most frequently sold as a "Mini Programmer" in two primary hardware variants: botland.store Black PCB Edition

: Generally considered more stable, though some versions have a known design flaw where data lines output 5V even when set to 3.3V, potentially risking damage to sensitive 3.3V chips. Green PCB Edition ch341a v 118

: Often preferred by some users because it is frequently built to supply a correct 3.3V to all pins without modification. Software Version 1.18 Features

The v1.18 software is part of the original, closed-source utility suite often included on mini-CDs with the device. Key characteristics include:

ch341a - What is it? Specifications, diagram, price and reviews - Botland 1 Apr 2024 —

With newer programmers like the TL866II Plus or the cheap FT232H-based flash carts, is the v 1.18 obsolete? Great for the price, but the voltage issue on v1

No. Here is why:

The only downside: It struggles with chips larger than 32MB due to addressing limitations of the CH341A chip itself. For 64MB or 128MB UEFI BIOS chips, you need a more advanced programmer.

The "v1.18" marking does not refer to the CH341A chip itself (the chip’s driver version or firmware). Instead, it refers to the printed circuit board (PCB) revision of the programmer module.

Manufacturers in China (Shenzhen, primarily) produce these boards in batches. Over time, they tweak the PCB layout, component placement, and supporting circuitry. Version 1.18 became a recognizable milestone because it struck an ideal balance between cost, features, and electrical safety. With newer programmers like the TL866II Plus or

I have tested three variants side-by-side:

To use the v1.18 safely for 3.3V chips:

Alternatively, buy a CH341A v1.5 or v1.7 (black PCB) which often comes with proper 3.3V/5V jumpers from the factory.

Scammers sell v 1.5 PCBs with "v 1.18" printed on them. How to spot a fake?

Excellent value for $5–8, but only if you’re willing to deal with old software, driver quirks, and a 3.3V voltage issue. It’s the go-to tool for flashing PC BIOS chips, router firmware, and 24/25 series EEPROMs. The v1.18 revision is common and fine, but not the best hardware revision.