• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

What chip to detect RF signals?

Status
Not open for further replies.

Mr Red

New Member
Can anyone tell me what kind of a chip is used to detect signals in the air?

I've figured out that the chip used on the cellphone keypad responds to certain frequencies. So far I've noticed that the LEDs connected to the keypad all have constant power, when the chip picks up the signal it simply closes the connection to ground for each line. Just wondering where I could pick up such a chip and what it's called.
 
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top