I want to use optocoupler 4N35 as switch to turn on a 5v fan.
im using generic design of led input 5v in series with 1k resistor.
i turn on led with 5v and i get reading of 5v on the other but when i connect the fan to the 5v on the other side i get only 2,3v... why such a big drop? internal resistance?
i would apreciate some help, thnks in advance.
im using generic design of led input 5v in series with 1k resistor.
i turn on led with 5v and i get reading of 5v on the other but when i connect the fan to the 5v on the other side i get only 2,3v... why such a big drop? internal resistance?
i would apreciate some help, thnks in advance.