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flash led schema 3v


Petrisor Ciocoiu
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  • 3 weeks later...
Guest cobru

Cat de exact vrei sa fie ? Fix 0.5 secunde on si 0.5 secunde off ? Conteaza culoarea ledului ( alb sau albastru nu se aprind prea mult la 3v, rosu ar fi cel mai indicat )

 

Daca nu te intereseaza sa fie foarte exact, un 555 e destul (varianta cmos, TLC555 sau TS555, care merg de la 2V in sus, nu NE555 care e la 5V).

 

Daca vrei fix 0.5 secunde on si 0.5 secunde off atunci un 74HC4060 cu cristal de ceas de 32.768khz iti da un puls de fix 0.5 secunde, schema de aici:

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(trebuie sa iei 74HC4060 nu 74HCT4060, ala cu T merge doar la 5V).

 

Simulare cu 555 facuta in graba (R1, R2 si C1 controleaza frecventa si cat de mult sta on ledul, gasesti calculator pe google pt ele):

 

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