1. The problem statement, all variables and given/known data I am given a problem for my electronics class that asks to design a transistor switch that will switch a 10-Ohm load powered from a +5V supply. The transistor beta is about 50. It also asks which current is needed to turn the transistor fully on (saturate it so that the collector-emitter voltage is less than 0.3V) 2. Relevant equations 3. The attempt at a solution My biggest problem is that the book we use SUCKS. I am simply lacking material and, maybe, some examples. I have tried approaching the instructor, but his explanations do not "speak" to me. I know what the circuit looks like. I then proceed to substitute the transistor with a diode+current source model. After that, I am befuddled. Any help and preferably hints are appreciated!