Wrong keyboard

Functional, but uncomfortable and noisy

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The idea was to have a keyboard with silent keys. Result is quite opposite: each key has its individual sound pitch, making it easy to spy on what you type.

Electronic scheme consists of six 74hc165 shift registers with parallel input. Each key is connected to the individual input and pull-up resistor. Solid surface under the keys is connected to common wire. Two more 74hc595 are there to give 16 outputs to status LEDs (well, just one LED by now).

Keys themselves are a bronze wire with paper key cap glued together with hot-melted glue.

If you are going to build your own keyboard, try to avoid disadvantages of this design.

I forgot to mention. It was atmega128 project. I want not to disclose the firmware, because it is buggy and deprecated. I'll better write a new one.


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cuvtixo wrote 08/01/2021 at 01:41 point

spy on what you type? this is the ultimate in security through obscurity . Who is going to take the time to learn the sounds of the keys for a keyboard with one user?

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heinz wrote 05/20/2021 at 12:40 point

Cool, do you have a video of it in action?

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dearuserhron wrote 05/21/2021 at 17:19 point

Heinz, check your Private Messages box. Do you see my message? Try to answer with another private message. I'm worried that PM chat is broken.

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Ahron Wayne wrote 05/28/2021 at 22:47 point

Put it on youtube! I see an avi file but it's weird to download stuff like that, definitely want to see in action and it's the easiest way.

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