KEYPAD INTERFACE

[nympha]

Mga master tanong ko lng po kung magkapareho lng po ba ito
http://www.google.com.ph/imgres?q=keypad+schematic&num=10&um=1&hl=tl&biw=1366&bih=634&tbm=isch&tbnid=SKQusjrQTBgR3M:&imgrefurl=http://iweb.tntech.edu/scanfield/Canfield/me4370/labs/calculator/index.html&docid=X691Hk2LevQczM&imgurl=http://iweb.tntech.edu/scanfield/Canfield/me4370/labs/calculator/keypadschematic.png&w=414&h=566&ei=nzdHT4OBHKGEmQXO7ez9DQ&zoom=1

Which is nakakabit sa ground.
compared dito:

http://www.ppr3.go.th/keypad-matrix-schematic&page=4

--> na nakakabit sa source  

(im using mikroC_pro compiler)
>>Ang problema ko po kasi eh ayaw gumana nung sample program nito sa keypad
>>Iniisip ko po na bka po meh epekto ung nkasink ung microcontroller kumapara dun sa nkasource ? Meron po ba?
>> Ung module po kasi na gngmit ko eh nkakabit xa sa source, eh ung hardware setup nmn na nkalagay sa manual eh nkakabit xa sa ground?
ok lng po ba un?   tia po

[Gwenda]

Kasi your code might be scanning for keys going one direction and your hardware, the keypad, configured to switch the other direction.  Dapat pareho hardware sa software (code).

[motion55]

May slight difference and it depends on the code.

I suspect nakuha mo rin ang code sa net and di mo rin 100% naintindihan. Baka the code you got does not match the hardware kaya ayaw gumana.

BTW, I prefer the circuit with pull-up resistors.

[nympha]

ah ok tnx po. Sa proteus po gumana xa pero sa actual sablay, kaya ko po natanong, Ung keypad po kasi ng "universal mcu kit" sa egizmo ung meh pull up resisto kaso po ndi ko mapagana, anyway slmat po sa reply