Converter keyboard usb

Although the pinouts are not too bad. You then write a keyboard driver for your new PC that converts the data stream from the old keyboard. The protocol is summarised as taken from this description :. When the keyboard has a byte to send to the computer a keystroke , it shifts 9 bits out to the data line RxD with nine clock pulses on the CLK line.

The data format is 1 start bit, followed by 8 data bits. The baud rate is roughly bits per second. The byte sent represents the scan code of the pressed key or a response to a command. I have heard of people trying to achieve this feat by putting a Raspberry Pi or Arduino between the keyboard and PC as a protocol converter.

But I don't know of any "How To" guide for this. One simply connects the wires, changing the connection from a mini-DIN to a USB connector, with no protocol changes at all.

They typically look like this:. Typically if an adapter is supplied with a keyboard, it will be one of these "wired through" connectors because it's much cheaper to build a keyboard that speaks both protocols than it is to build a keyboard that speaks just one and an entirely separate electronic system to convert the protocols.

The second type talks the AT protocol on one side and the USB protocol on the other, being essentially itself a small computer that converts between the two. These will often look a little bit larger, but not always:.

Anything that came with a keyboard is most likely the first type of adapter. Anything without a second connector for a mouse is probably the first type of adapter, unless you have some evidence otherwise.

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Click to enlarge. Buy in bulk and save. Product Description You may use this converter to convert output of serial devices such as RFID readers, Barcode readers, scales, game controllers, etc.

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Contact us here. Or You can read more about us to see our vision. Check our ranking below. Bestseller No. Can I use this to make the USB keyboard working? That is possible but in some cases the wiring in the mouse plug is different and you would need to change some of the pins. Is it possible to follow the same circuit diagram for that. Reply 4 years ago. Actually for reversing you have ready made adapters available.

Look up on dx. These are quite cheap and work VERY well. Reply 5 years ago. Nice mod sir, congrats :. Is it possible to mod it into usb?. Problem is device driver availability. After intensive search no one seems to have published a mod like that. Someone published an usb ball mouse steering wheel mod very nice, and I'm thinking this mouse circuit board could be used for the Joystick.

This will not work. It has clock and data lines. Hence USB will give message device not recognized.