Reddit mentions of Tab Electronics Guide to Understanding Electricity and Electronics

Here is a good book to get you started.
Tab Electronics Guide to Understanding Electricity and Electronics https://www.amazon.com/dp/0071360573/ref=cm_sw_r_cp_apa_i_dY.ADb1263B4S

Another
Make: Electronics: Learning Through Discovery https://www.amazon.com/dp/1680450263/ref=cm_sw_r_cp_apa_i_mZ.ADbV1KTHK3

This is the first book I read on the subject! It starts with the water-flow analogy of electricity and identifying components, and goes up through analog and digital circuits with some great projects along the way. I built the analog power supply project inside the housing of an old radio and still use it at home.

Tab Electronics Guide to Understanding Electricity and Electronics

Thanks for verifying that for me, it's left me a little concerned about my mathematical skills. I can't seem to get it to adjust to the range I desire, it seems to range from 15-20 volts and I can't seem to get it any lower, even after replacing the zener reference with an actual 7805 regulator. I'd like to be able to change the voltage of this with a single pot, but as I said it's not doing the range I desire. Do you have a suggestion for any good schematics for op-amp or transistor based adjustable voltage regulator that you've enjoyed? I have a book which contains several chapters leading up to the construction of a dual adjustable supply, but I can't seem to find much direct information in the book regarding what the expected range would be, so i don't know if I should build it or not yet. I know I could always grab a couple lm317's to build a nice dual adjustable supply, but that really takes the fun and learning out of the whole project for me :P

Thanks!

Tab Electronics Guide to Understanding Electricity and Electronics

This book seems to be the world's favorite intro book.