The CH340 USB to serial adaptor (HCMODU0076) makes use of the CH340 USB to serial IC to provide a low cost alternative to our popular FTDI based module. Although much cheaper this module doesn't lack in features or usability. Once you have installed the drivers the module will appear as a normal serial COM port on your computer making it compatible with most terminal programs and development environments such as the Arduino IDE. The module includes a small switch which allows the voltage available at the VC (Supply output) pin to be switched between 3.3 and 5V. Data pins include TX, RX, CTS and DTR (needed for automatic reset when programming Arduino boards). These digital pins are at 5V TTL levels allowing them to be directly interfaced most 5V microcontrollers. Please note: Driver support is currently for Microsoft Windows 32/64 bit only. PINOUT DTR....Data Terminal Ready RXD....Serial in TXD....Serial out VC......3.3V or 5V Supply out selected via switch CTS.....Clear To Send GND....0V Windows Drivers are available on our support forum. Link is provided on product packaging. rules prevent us from adding a direct link here.
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