I have a 6V power source. I'm using a 2N3904 (NPN) transistor as a switch. My intent is to turn on a high power LED driver with a microcontroller (MC) output (~25ma) using the transistor.
I was hoping to use the MC output to control the 3904 base which would in turn allow 3v to turn on the LED driver. I'm having some troubles because the 3904 seems to have a max Ic of 200ma which seems to low for the driver. Also, how do I make sure that 3V goes to the driver ? I understand there will be some voltage drop between Collector and Emitter. How is this voltage drop determined?
I hope I included enough detail.
Thank you in advance.
Bud
I was hoping to use the MC output to control the 3904 base which would in turn allow 3v to turn on the LED driver. I'm having some troubles because the 3904 seems to have a max Ic of 200ma which seems to low for the driver. Also, how do I make sure that 3V goes to the driver ? I understand there will be some voltage drop between Collector and Emitter. How is this voltage drop determined?
I hope I included enough detail.
Thank you in advance.
Bud