Weak current generally refers to DC circuits or audio, video lines, network lines and telephone lines, and the DC voltage is generally within 32V. Telephone, computer, TV signal input (cable TV line), audio equipment (output line) and other electrical appliances in household appliances are all weak current electrical equipment.

Learn the basic knowledge of electronic circuits and electricians

I think you should learn the basics of electronic circuits and electricians first.

Do more circuit experiments

Secondly, we should do more circuits and experiments.

Learning high frequency electronic circuits

When you think you are good enough to learn electronic circuits, you can learn high-frequency electronic circuits. It's difficult. It doesn't matter if the foundation is good.

Learn from the master

Learn more, learn from the master and go to the construction site for practice. Practice makes perfect.

Learning single chip microcomputer

If you are good at all aspects of hair, you can learn single chip microcomputer.