As a beginner in electronics I am fascinated by the ingenuity of transforming theoretical concepts in physical world. A simple physical action of on/off gate is achieved by a transistor on board, which led to the architecture of modern computers! I have a simple question - when a transistor is "closed", does the voltage at collector become practically zero, that is, a positive measurable by a multimeter but for all practical purposes zero? The reason, I am asking this question, is that on my board I do have a three transistor switches connected to perform a certain task and the voltage at the collector, which should be zero, is about 0.20 V.I tried various combinations of resistances at bases but this is the minimum voltage. The combination of three transistors gives the desired result.(The details of the circuit is not included only for not crowding the question).
sureshparanjape
sureshparanjape