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about 16f84 (c)

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do_not_panic

New Member
hi i have questions about 16f84
i have 10 keys. when i press anyone this signal will appear on lcd and also one led will turn on .
can it be possible ?
is there any program about it? how can i find this program and schema? thanks
 

Nigel Goodwin

Super Moderator
Most Helpful Member
do_not_panic said:
hi i have questions about 16f84
i have 10 keys. when i press anyone this signal will appear on lcd and also one led will turn on .
can it be possible ?
is there any program about it? how can i find this program and schema? thanks
It's possible, but you would need extra hardware as the 16F84 doesn't have enough I/O pins.
 

StupidDum

New Member
eh. that is the most common use of microcontroller
interfacing with lcd and keypad
the schematic is simple. just connect the lcd, keypad pins to pic I/O pins
 

do_not_panic

New Member
Do you know how to achieve this problem? Shoul i use other pics? for example what?

May you give me any links about it? thanks
 

do_not_panic

New Member
ok.very thanks if anybody can find any link about it pls send me.
 

stef

New Member
I would suggest using a hex keypad encoder for the keypad eg 74ls922 or the like. Use the 8255 port expander to increase the I/O lines of the PIC.
 
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