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DLR sau lumini de zi cu putere scazuta

De fapt ce este un DLR si la ce ajuta ?! Toti stim sau cel putin constinetizam nevoia de a aprinza faza scurta cand pornim la drum . Acum , de cand sintem in UE apare si obligativitatea acestei porniri .

Dlr face automat aceasta pornire , la o putere scazuta la mai putin de jumatate din cea nominala.

Atunci cand pornim , electromotorul are nevoie pentru cateva secunde de toata energia bateriei , si de aceea e bine sa nu aprindem faza scurta chiar la punerea contactului . Asa ca am activat o intarziere de cam 10 secunde ( reglabila soft ) pana ce intra in functiune farurile .

Elementul cheie, este un controler PIC12F508 A , caruia i-am scris un program simplu in assembler . Am generat soft un asa zis PWM , sau modulatia impulsului , desi aici duty cicle e oarecum fix , setabil doar din 2 jumperi . Mai bine zis , un jumper seteaza un duty cicle de 25% , iar celalalt unul de 40% . Bineinteles ca si acestia pot fi modificati soft.

In acelasi timp , DLR ul e capabil sa intre in st by atunci cand utilizatorul doreste activarea luminilor de pozitie sau fazelor lunga/scurta .

Elementul de putere e un FET de tip P , care are ca sarcina , cele doua becuri de faza scurta.

PIC functioneaza intern la 4mhz si am setat o iesire si trei intrari , respectiv , 2 intrari de tip jumperi , care puse in 5v genereaza impulsuri de 25 % sau 40% . Ultima intrare simte aparitia 12v de la aprinderea pozitiilor si taie generarea impulsurilor . Fiecare e liber sa modifice codul sursa dupa necesitati 

Codul sursa :

valentine15 

Schema :

DLR

 

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