To the average e-enthusiast, the RS-232 interface always appears friendlier than the USB port. However, even with a small 8-bit microcontroller, it's easy to implement the USB bus in device mode. The advantages are obvious:
- You save the cost of a USB/RS232 converter.
- USB devices such as keyboards can be easily emulated without needing a separate driver, meaning you are able to design a programmable USB keyboard at minimum hardware cost and software effort.
And as you will discover here, our versatile USB Keyboard Stick not only helps to build useful designs — it’s also fun to use by itself!
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