Hello, I'm new here and I apologize for my first post being a design question. I'm a 20 year old junior Electrical Engineering student from the University of Akron. I need some help with a design that I can't get working for the life of me!! If you know pSpice Schematics, or OrCAD Capture, then you might be able to help me out. I have to design and simulate a linear regulated power supply that takes 120V RMS @ 60Hz and outputs 4.7V DC. It has to be capable of supplying a load current up to 30mA with an output ripple of no more than .5V and it has to use a half wave rectifier. Now, my idea was to use an AC voltage source into a linear transformer (turns ration to be decided by experimentation), then run the transformer output into the half wave low-pass rectifier (which would just be a diode and a shunt capacitor), the voltage output of that would run into a voltage regulator or zener diode for smoothing. I've tried this in Schematics and I was unable to get anything resembling a working circuit. I also tried it in Capture but I'm no good with Capture cause we've NEVER used it and alluva sudden, this teacher wants us to use it. Can anyone give me any helpful advice, circuit schematics, or could even show me what I should be doing in pSpice? I've searched the internet for working schematics that I could easily input to pSpice but I was unable to find anything. Thanks for the help.