Make: Electronics, 3rd Edition

Section Two Switching

Using a switch to control electric current seems a very basic idea, but in this section I won’t just be talking about switches that you push with your finger. One flow of electricity can switch another flow, using a relay or a transistor. This type of switching is so important, all digital devices depend on it.

Also in this section I will deal with capacitance, because the concept is as fundamental as resistance in electronic circuits.

As in Section One, I will begin with a catalog of recommended tools, supplies, and components, so that you can recognize them easily. You may already have some of these items, but if not, please turn to the back of the book for instructions on how and where to buy them:

• •  See Appendix A ...