4x4 keypad hookup

James_77

I'm very new to microcontrollers and I would like to ask·this
question please.·
Can I hardwire pins from a 4x4 keypad directly to BS2 pins- sort
of like wiring a simple push button-· to simplify coding and simplify
hookups- no controllers/interfaces, etc.· ?

For example, I want to wire so that· # 1 on the keypad is directly wired
to p1 on the BS2,· #4 on keypad to p4, and #8 on keypad to p8.

So, basically, my "passcode" is 148.

Then,· I can code the BS2:

if p1=high, store the number 1
if p4=high, store the number 4
if p8=high, store the number 8

If "storage" = 148, pulseout ........·· (activate a servo or peizo speaker,·blink an LED, or whatever)

My guess is that you can't because of the way the keypad circuitry is designed.

BUT, it would be a huge relief for me if I can- it would save LOTS of time as I'm older with
3 young kids and don't have much time to learn- although the Parallax 4x4 keypad with MEMkey
might be a fairly easy solution.

I·need a keypad·system that activates a servo to rotate·about an inch.

I VERY MUCH appreciate any advice·that anyone·can swing my way

James

Mike Green

Have a look at the several Nuts and Volts columns on the subject (I think mostly in volume 1):

www.parallax.com/Resources/NutsVoltsColumns/tabid/272/Default.aspx

James_77

Thanks Mike-· Very good articles with good info.

Much appreciated.

James