Keypad using IR beams for keystrokes

Check the attachment.

Wanting some sort of inferred switch keyboard to be made. If its possible using IR break beams or something similar to use for keystrokes.

I will try to explain this:

You know how you have a keyboard for your computer? When you make a keystroke, the plastic button touches the membrane making a connection right? The membrane plugs into the keyboard electronics.

Now this is what we are looking to have made, but keep in mind I am not sure if it can be made considering I feel that pressing the same key twice in a row may not register as 2 keystrokes but instead one.

You are NOT going to make or design the keyboard electronics. You are going to just design the keypad, much like a membrane with sensors on it, that’s all.

This will be made with some sort of IR break beams, inferred or motion beams etc, whichever works. Something around that nature that works for this.

The sensors on the flex board will wrap around the buttons and detect a keystroke. The flex board will tell the keyboard like a regular membrane would, which keystrokes were being made.


I have an illustration showing you what a normal keyboard works. And under it shows you how our keypad would work.

Now this is the part I am not sure of. So there is 3 questions I have which will answer if this can even be made or not:

[url removed, login to view] IR break beam as I think must have to completely break to create a switch. Or maybe it can just move to create it. Or maybe there is another sensor that can do this also. Because the button will not go down all the way to pass the beam. There for the beam will have the button in its way as it goes down and back up. Sometimes the button may press down at an angel as well. Will this be able to get a key stroke?

[url removed, login to view] if you typed in 3 different buttons, then typed in one button twice in a row. The button moving up and down twice, can this correctly be detected as 2 key strokes or will it be detected as one keystroke? Can this be created to be made perfect so the button does not have to pass the beam for it to work, and one button can be pressed more than one in a row and it will detect it perfectly every time?

[url removed, login to view] much sensors is needed per key? And how much Mah does each sensor take up an hour on a battery if being run on a Bluetooth keyboard. And if it takes up a lot, can it go in idle mode like a wireless mouse would when not being used?

[url removed, login to view] would like the components on the board to not be taller than 1mm if possible. If that is not possible then what is the smallest available?

Please let me know if this keypad is even possible to make and be fully functional in the way I did the drawings without any mistakes.

Its also possible that Laser Diodes could also be used for this as they detect movement such as they are used in a mouse. And can detect if something moves up and down to know if it was one key stroke or 2 of the same keys in a row.

Skills: Electrical Engineering, Electronics, Microcontroller, Microstation, PCB Layout

See more: key strokes, what is computer illustration, i beam design, how to get illustration work, go wireless, get wireless, get an illustration, beam design, what time works for you, angel design, 10 keypad, flex board design, sensors, plastic part design, motion board, microcontroller design, keystroke, IR, IDLE, how can i get a computer design, check for connection, beam, Angel, looking plastic, detect connection

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Project ID: #1269569

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