sazerac99us
New Member
I know this is pretty basic stuff, but i want to do it right...this circuit, uses the output of an LM358 op amp to drive a BC548 transistor, which either drives a small load, or a relay, for a bigger load.
My questions is this. The load I want to drive is in the range of 1 amp DC, and I'd rather drive it with a transistor than a relay. The problem, is that I dont think the out put of the LM358 is enough to drive a big enough NPN (with their much lower gain) to handle 1 amp hard enough to saturate it. Is it bad practice to drive a pair of the smaller VC548s, and use them in parrallel to handle larger amounts of current?
Any ideas or circuit diagrams will be greatly appreciated.
My questions is this. The load I want to drive is in the range of 1 amp DC, and I'd rather drive it with a transistor than a relay. The problem, is that I dont think the out put of the LM358 is enough to drive a big enough NPN (with their much lower gain) to handle 1 amp hard enough to saturate it. Is it bad practice to drive a pair of the smaller VC548s, and use them in parrallel to handle larger amounts of current?
Any ideas or circuit diagrams will be greatly appreciated.