tastatura | a gde

Tag: tastatura

Pločica sa tasterima

Monday, March 9th, 2009 | PIC primeri | No Comments

Plocica sa tasterima

Ova pločica se sastoji od 4 tastera konektovana na gornja 4 pina jednog porta i 4 LEDare konektovane na donja 4 pina istog porta. Tasteri su spojeni na gornja 4 pina posto RA5 može da bude samo input a RA4 je open-collector izlaz. Ostali pinovi su “standardni IO pinovi

Plocica sa tasterima - gotova - gore

Plocica sa tasterima - gotova - dole

Tags: hw, nigel goodwin, pic, primeri, tastatura, winpicprog

4×3 keypad na jednom pinu

Sunday, March 8th, 2009 | Ostalo | No Comments

Kako zakaciti 4×3 keypad na mikro kontroler bez da koristimo brdo pinova (7), smaramo se sa multipleksiranjem … lako, iskoristimo ADC na mikrokontroleru.
Generalna ideja je da napravimo od tastature varijabilni otpornik koji ima razlicitu vrednost za svaki taster, iskoristimo isti kao delilac napona koji dovedemo na ADC ulaz i procitamo taster koji je pritisnut.

Sema i source za PIC (source u mikroC-u) koja cita sa tastature taster i pali odgovarajucu diodu.

read 3x4 keypad over single pin

MikroC projekat
C source
HEX

Tags: hint, keypad, pic, tastatura

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Tag: tastatura

Pločica sa tasterima

4×3 keypad na jednom pinu

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