Keypad 4*4 driver

[manba]

Hi, all there.

I wanna design keypad 4*4 without using microcontrollers. I there keypad driver ic that convert the input of the keypad to 4bit or 8bit. plz help me.

 

[blueroomelectronics]

74C922, probably cost more than a microcontroller though.

 

[MrUmunhum]

74148 ic

Hi, all there.

I wanna design keypad 4*4 without using microcontrollers. I there keypad driver ic that convert the input of the keypad to 4bit or 8bit. plz help me.

What are you connecting it to? You could use 2 74148 IC. Search for a datasheet on them.

I have been working on a project that MAY be helpful for you. It is the draft and needs to be cleaned up but it is runable:ttypins Check out the '1 of 16'. I have not tested this yet.

Or you just use a USB Keypad.

 

[Mike_2545]

Check out this thread: http://www.electro-tech-online.com/threads/4-by-4-keypad.91329/

 

[manba]

Hi,all.

thanks alot for your help

 

[Mike_2545]

Your welcome

 

[MrUmunhum]

Let us know how things work out.

Please do post you findings.