I have a set-up using an LED, with each wire that comes from the LED going to either side of a coin battery.

What I need is some kind of pressure swithch to turn the LED on and off. Unfortunately, I do not know what name this little thing is known by. I have seen one before, kind of a silver, almost flat "cone" that with pressure between 2 fingers will allow one of the wires to touch the battery, completing the circuit and turning the LED on.

As it will be used with a coin battery (less than the diameter of a quarter), it will be quite small, probably 1/4" in diameter or less.

Would be grateful is someone could tell me what these little things are called

Thanks ~

I am assuming the switch is hidden. Is the switch for toe, finger, elbow.

As mentioned above, it is

This is not a switch in the conventional sense of the word. Think of the action as that of a clicker - the piece stays in a certain shape (in this case, a slight cone shape) and rests on one side of the battery. There is a wire on that. When pressed, the "switch" flexes into a different position, and allows the wire to touch the battery.

Imagine a very flat cone - think of a very small, flexible metal disk that is just slightly cone-shaped.

The fact that the piece is not completely flat while resting on the battery keeps the connection from occuring. When pressed, the metal "gives" and allows the wire to touch the battery, making a connection, and the LED lights up. When you release pressure, the metal pops back to its original shape, moving the wire away from the battery, and the LED goes out because the connection is no there.

In the case I'm using it for, this piece would have less than the diameter of a dime.

Think of a keychain light that will light up when a button is pressed, and go out when pressure is released.

Here are a couple of pictures.

The first shows the switch as you would see it from above. There is a dimple that curves down toward the whatever it will connect with underneath. A wire is taped on top of this. When the switch is pressed, the dimple lowers, and touches the what it needs to, and the connection is made. The circular edge of the switch rests on a sticker with a hole in the center, so the edge is separated from what the dimple will connect with, and only the dimple will actually touch. When pressure is released, the switch pops back to its normal position.

2nd photo is from the underside of the switch.

Again, just need to know what this little item is called.

It looks and sounds like it is part of a membrane switch.

Google "Dome Switch"

The old classic Atari joystick had five of these. They were taped in place on the circuit board.

Great! Thank you! It appears that "dome switches" are what I am looking for. It was very interesting looking up info on membrane switches, as well.

Thanks again - much appreciated.