What's below the keys? Pull a key off the keyboard and you'll see roughly however it works. There is a very little hole within the plastic base and th...
What's below the keys?
Pull a key off the keyboard and you'll see roughly however it works. There is a very little hole within the plastic base and therefore the keyboard features a long spherical bar a similar form. once you press the key, the bar pushes down through the outlet to the touch the contact layers below. within the outlet, there is a very little small piece of rubber (you cannot see it during this photo) that stops the key moving down and pushes it duplicate once you unleash it. this can be what provides the spring to the keys.
How do the keys press down?
Peel back the tangency layers and you'll see rock bottom of the keys and wherever they depress. leveling on my tip, you'll see one in all the insufficient rubber items that produces the keys bounce up and down.
How do the contact layers work?
This is the magic a part of a keyboard. There area unit 3 separate layers of plastic that employment along to notice your key presses. 2 of them area unit coated in electrically conducting metal tracks and there is AN insulating layer between them with holes in it. The dots you'll see area unit places wherever the keys press the 2 conducting layers along. The lines area unit electricalal connections that enable small electric currents to flow once the layers area unit ironed tight to at least one another by a key moving down from on top of.
There's one set of electrical connections on the lower sheet of plastic, written in light-weight grey. the opposite set is on the higher sheet of plastic and written in dark grey. the 2 sheets area unit unbroken apart by a transparent plastic layer except at the holes, that is wherever the keys strike to create the 2 sheets bit.
