Audio reproduction (amplifiers and peripherals) has drawn me to the world of electronics. Making and audio amp was my first "pet project".
To learn more about how to realize my project I researched inside some libraries and bought some books.
After getting hold of an electronics project making book, got me interested in more projects.
There were times that I asked (sometimes appealed to) some professors if it was possible to "sit-in" on his/her electronics/computer class (if there is no schedule conflict with my regular course subjects) so that I can learn more about the subject. Most of them approved my request (didn't earn me college credits though, but hey I got to learn more for free)
As a college student that time, buying electronics parts for my project means saving part of my daily allowance to finance my hobby.
And as the local electronics cluster of stores is in short distance from school, I'd walk (to save additional cash) through it to browse stores on some parts and kits.
Successfully built my first DIY "component style" audio system before I graduated college.
One college project that we need to complete to pass a particular subject (from the regular course) was to make a "micro computer" based on the Z80 microprocessor. That got me to learn about digital electronics. The system was setup using breadboards to demonstrate that it works. We had to learn how to use a breadboard. Of the 20 groups assigned to do the same project, our group was one of two that successfully ran the test program and passed the subject.
Due to my keen interest in electronics and computer programming, most of my college batch mates actually though I graduated from Electronics Engineering or Computer Engineering when in fact I graduated from Electrical Engineering (dealing in power generation, power transmission and distribution)
. Most of them were surprised and wondering why I was with the "wrong group" during graduation.
Well recently the RPi and Arduino got me back to that interest. Have steadily increased my parts inventory mostly acquired from online shops.
And there are still more projects that I want to complete. Its just a matter of finding time after work (and other hobbies).