---
product_id: 20599228
title: "Gearmo® USB to 3.3v TTL DB9 Adapter"
brand: "gearmo"
price: "RM12"
currency: MYR
in_stock: false
reviews_count: 3
url: https://www.desertcart.com.my/products/20599228-gearmo-usb-to-3-3v-ttl-db9-adapter
store_origin: MY
region: Malaysia
---

# +3.3V power output, 50mA Plug & play USB COM port compatibility USB to TTL Serial interface Gearmo® USB to 3.3v TTL DB9 Adapter

**Brand:** gearmo
**Price:** RM12
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Power your projects with precision and plug-and-play ease!

## Quick Answers

- **What is this?** Gearmo® USB to 3.3v TTL DB9 Adapter by gearmo
- **How much does it cost?** RM12 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.my](https://www.desertcart.com.my/products/20599228-gearmo-usb-to-3-3v-ttl-db9-adapter)

## Best For

- gearmo enthusiasts

## Why This Product

- Trusted gearmo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **3.3V Logic Power Output:** Power your external logic circuits directly from the USB port with 50mA output.
- • **Plug & Play Convenience:** No drivers or extra programming needed—just connect and start communicating instantly.
- • **Powered by FTDI FT232QR Chip:** Experience cutting-edge, stable performance with the latest USB-to-TTL technology.
- • **Seamless USB to Serial Bridge:** Effortlessly connect your PC to embedded systems with a reliable DB9 D-SUB interface.
- • **Advanced UART Protocol Support:** Customize data bits, stop bits, and parity for versatile serial communication.

## Overview

The Gearmo® USB to 3.3V TTL DB9 Adapter is a high-performance USB-to-serial converter featuring the latest FTDI FT232QR chip. It supports flexible UART configurations and delivers a 3.3V/50mA power output to external logic circuits. Designed for seamless integration with Windows PCs, it appears as a standard COM port, enabling instant serial communication without additional drivers or programming.

## Description

Voltage level Supports +3.3V based UART signals and +3.3V / 50mA power output This USB to Serial UART (TTL level) adapter. It allows you to connect your computer through USB port and use it as a regular serial communication. All USB protocol is handled within this adapter. There is no other device or programming required. The adapter is perfect for embedded systems that require a serial connection to a computer. The board attaches directly to the USB bus via a standard type A receptacle connector. It shows up on any Windows computer as a standard serial COM port. Any applications that talk to this COM port is automatically convert to USB and back to UART to your target board.

## Features

- The Cable provides a USB to TTL Serial interface with DB9 D-SUB connector.
- UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity
- Utilizes newest FTDI FT232QR chip
- UHCI / OHCI / EHCI host controller compatible
- +3.3V output allows external logic to be powered from the USB port

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Gearmo |
| Connector Type | Usb |
| Cable Type | USB |
| Compatible Devices | PC |
| Color | Beige |
| Unit Count | 1 Count |
| Manufacturer | Gearmo |
| Item Weight | 6.6 ounces |
| ASIN | B004LC5RMO |
| Is Discontinued By Manufacturer | No |
| Date First Available | January 28, 2011 |

## Product Details

- **Brand:** Gearmo
- **Connector Type:** Usb
- **Cable Type:** USB
- **Compatible Devices:** PC
- **Color:** Beige

## Images

![Gearmo® USB to 3.3v TTL DB9 Adapter - Image 1](https://m.media-amazon.com/images/I/4109NEdGL9L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    FTDI-based solution is the only one that works!
  

*by C***® on Reviewed in the United States on November 20, 2011*

I'm an unapologetic FTDI fan boy. Their USB-to-serial hardware solutions have been used for years in the embedded products for which I write software and firmware. They just work, and their application vastly simplifies maintenance and reduces footprint on the board. This cable, which has an FTDI TTL-level serial to USB converter chip inside, was the only device of this type that worked of the three I tried. And it did so flawlessly. I ordered another to keep in my tool kit.

### ⭐⭐⭐⭐⭐ 







  
  
    Works great. Plugged into my Macbook Pro USB port
  

*by L***B on Reviewed in the United States on June 2, 2015*

Works great.  Plugged into my Macbook Pro USB port, and other end to an embedded 3.3V UART.

### ⭐⭐⭐⭐⭐ 







  
  
    A must buy and cannot beat the price.
  

*by I***C on Reviewed in the United States on September 1, 2016*

Bought 5 and vetted them well.  Then went back and bought what they had left, 20.  Excellent product.Doesn't require an install disc and Windows 7 automatically installs a good driver.I'm using this converter to communicate to a 3.3V UART and it beats buying both a usb to rs232 adapter and an overpriced ttl converter from competitors.  Wish the vendor had more.  I am about to purchase another 10-20 of them somewhere else because this vendor hasn't restocked them for 4 months or so.

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*Product available on Desertcart Malaysia*
*Store origin: MY*
*Last updated: 2026-02-27*