Big Dome Pushbutton - Yellow

It's the end of the world, and you need a button to press. This is it. A 100mm diameter (outside diameter) dome illuminated push button comes with an LED, securing nut and a pre-installed long life horizontal microswitch. Button can also be adjusted to a low profile button by removing the middle ring.

  • LED indicator light runs at 12VDC
  • Bulb holder is easy to install or remove
  • 3 Terminals Button Actuator microswitch included
  • Microswitch reliability tested to 10,000,000 cycles
  • Microswitch can be replaced
  • Polycarbonate lens cap for optical clarity* 100 mm Diameter x 72 mm Height
  • Net weight: 100grams
  • Mounting hole diameter: 24 mm

Big Dome Pushbutton - Yellow Product Help and Resources

Adding a Timed Button to a Project

July 29, 2015

This tutorial will walk you through making a timed power controller for interactive projects. You will learn how to add an on button that will provide power to your project for an amount of time and then turn off again.

Reaction Timer

January 16, 2014

Demonstrate mental chronometry with this simple reaction timer!

Connection Help

In case you have never used a microswitch or this push button before, here are some links to some tutorials that will help get you started.

Core Skill: DIY

Whether it's for assembling a kit, hacking an enclosure, or creating your own parts; the DIY skill is all about knowing how to use tools and the techniques associated with them.


Skill Level: Noob - Basic assembly is required. You may need to provide your own basic tools like a screwdriver, hammer or scissors. Power tools or custom parts are not required. Instructions will be included and easy to follow. Sewing may be required, but only with included patterns.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

1 Electrical Prototyping

Skill Level: Noob - You don't need to reference a datasheet, but you will need to know basic power requirements.
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Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

Customer Reviews

4.2 out of 5

Based on 6 ratings:

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Works as advertised!

The Buttons works very nicely. The LED is not that bright, but it can easily be replaced.

Good Product!

a very cool product.

When I saw these big buttons. I knew exactly what I was going to make. Anyone for two player Simon Arcade? Check it out at

Nice buttons

I ordered 10 buttons, i actually needed 8 but i ordered 2 spare ones. I am lucky i did that since one was broken on arrival.

Sturdy buttons

They handle the wear and tear of 3000 kids a day at the Houston Museum of Natural Science. our only complaint is the internal light is not interchangeable, we have replaced the microswitch and have back ups but if we want to fix the led we have to buy a whole new button.

I like so much I drew it

I drew a 3D model at Grab Cad:

I took Campbell's 15oz microwavable bowl (ate the contents) put the button into the container, I wired in a stereo audio jack for the LED and switch. I connected that to an Arduino and made a buzz in game, using the four different color buttons.