Hello. I am now creating my first project. I faced a problem with transistor's types. I originally using transistor S 2013 for my circuit with Collector 9 volts and Base 9 volts. The transistor heated up and failed to function anymore. So, what should I do? Should I replace the transistors (For example transistor 2 N 2222)? And, since I putted the transistors in amplifier mode, if I put 9 volts to Collector and Base respectively, can I get a 18 volts output at Emitter? Thank you.
Peter.
Peter.