Post project 10: USB Stick Disguised as a Keyboard
To the average e-enthusiast, the RS232 interface always appears friendlier than the USB port. However,
with a small 8-bit microcontroller, nowadays it’s possible to implement the USB bus in device
mode. The advantages are obvious. First, you save the cost of a USB/RS232 converter. Then, 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!
To the average e-enthusiast, the RS232 interface always appears friendlier than the USB port. However,
with a small 8-bit microcontroller, nowadays it’s possible to implement the USB bus in device
mode. The advantages are obvious. First, you save the cost of a USB/RS232 converter. Then, 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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