{solved} which resistor should i use?

Status
Not open for further replies.
J

joy123

Member level 2
Joined
Mar 19, 2010
Messages
44
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
1,589
ok guys need little bit more help, i am trying to drive 2 fan from a scart output in a satellite box,

problem 1: i know the pin 8 should read max 12v, but i am reading constant 15.99v(should be 0v when the box stendby)

problem 2: i have 2 fan(12v 0.13 amp) which i want to drive from pin 8, from my understand i need, based on 16v 4/(130+130)=.015 kohm=15 ohm resistor, is it right? or do i need any resistor at all?

problem 3: same power source 1 dual fan(5v 150 ma) 11/150=73 ohm, right?
 

which resistor should i use?

Problem 1 : you have to identify yourself what is going wrong.

Problem 2 : Use a regulator,most preferably LM7812 to get 12V for the fans

Problem 3 ; Use a regulator,most preferably LM7805 to get the 5V for the fans,

instead of resistor and such methods.


Regards,
 

    J

    joy123

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…