Now that I have a 339 comparator working I'd like to use it to actuate a 25 amp relay. Being as the 339 has a 20 mA max output sink and the relay will need 200mA, I'm thinking a transistor in the middle, but I honestly don't have enough experience or knowledge to know if this is feasible or not.
But, if so, can anyone recommend a transistor that can handle the 200mA?
The other thing I'd like to ask about is, having recently realized the 339 is a low power comparator, is there a high powered comparator out there that could handle the 200mA? Eliminate the middleman?
Firmly believing in the power of the internet and realizing Google is my friend, I did some poking around for such a device. What I found seemed to application specific tho. Audio this. Auto that. Not sure if I'm barking up the wrong tree or what.
All advice welcome. I'll believe anything you tell me ..... lol.
SP
But, if so, can anyone recommend a transistor that can handle the 200mA?
The other thing I'd like to ask about is, having recently realized the 339 is a low power comparator, is there a high powered comparator out there that could handle the 200mA? Eliminate the middleman?
Firmly believing in the power of the internet and realizing Google is my friend, I did some poking around for such a device. What I found seemed to application specific tho. Audio this. Auto that. Not sure if I'm barking up the wrong tree or what.
All advice welcome. I'll believe anything you tell me ..... lol.
SP