Knife block that creates sound when knife is put into it.

[Kiblowsky]

Hi guys, I want to make a Project: a knife block with a speaker that plays a sound when a knife is put into the block.

I image the sensor Will be inside the Block.

What sensor would I need to do this? It cant be infrared as the knife has no heat, right?

 

[gophert]

Hi guys, I want to make a Project: a knife block with a speaker that plays a sound when a knife is put into the block.

I image the sensor Will be inside the Block.

What sensor would I need to do this? It cant be infrared as the knife has no heat, right?

What kind of sound? A single thump, or do you want it to play a musical chord or Mary Had A Little Lamb?

 

[Kiblowsky]

A scream.. haha

 

[Kiblowsky]

What kind of sound? A single thump, or do you want it to play a musical chord or Mary Had A Little Lamb?

A scream

 

[gophert]

I would use the steel knife blade to complete the circuit and the scream will play. I am sure you can find plenty of push-button scream boxes this time of year.

If you are using a plastic knife, I would use a microswitch with a spring lever.

15A @ 240V Lever, Long, Roller Miniature Snap Action Switch; Series V

Mini Swch, 15A, 1 NO, 1 NC, Lng Roller Lever

www.grainger.com

!

 

[JimB]

I would use a slotted opto isolator, in the style of these:

Slotted Optical Switches, Photo Interrupter | RS

A slotted optical switch is used for on and off signalling when the light beam from an LED is interrupted to effect a status change in the device.

uk.rs-online.com

JimB

 

[narkeleptk]

Hi guys, I want to make a Project: a knife block with a speaker that plays a sound when a knife is put into the block.

My wife would kill me if I did this to her.