The CH340 chip converts TTL (serial) to USB, this chip is used in programming/project boards, cables and many other applications. These project boards are often used in workshops, labs and areas when a Windows 7 machine may still be in use. If this Windows 7 machine isn't connected to the internet like many lab computers are, simply download the driver below and copy to a USB drive/USB stick and move the driver over to the machine manually.
(Latest) WCH CH340 Driver
File: CH341SER.ZIP
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(older version) WCH CH340 Driver
File: CH341SER-3.7.ZIP
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WCH CH340 Driver
File: CH341SER-master.zip
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ch340 driver
File: CH341SER.EXE
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ch340 driver
File: CH341_USB_to_Serial.zip
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