Designed and prototyped a series of foundational analog and mixed-signal circuits to develop practical electronics fluency, including transistor switching circuits, 555 timer oscillators (astable, monostable, bistable), RC timing networks, and an LM358 electret microphone preamplifier. The work focused on schematic interpretation, signal behavior, gain and feedback tuning, and hands-on debugging using oscilloscopes, function generators, and multimeters, followed by soldered prototype board assembly. 

Keywords: Analog Circuit Design, 555 Timer, RC Timing, Transistor Switching, Signal Debugging, Oscilloscope Measurement,  Soldering, Prototype Board Assembly, Electronic Schematics