Summary

CHAPTER 3: Basic Hacks 53

You might see a switch described as “DPDT, On-Off-Mom.” Well, we know what the DPDT bit means. It will have six legs for a start. The “On-Off-Mom” part means that it also has a center position, where the common connection is not made to anything. Switch it one way and it will be on to one set of contacts and stay in that position. Switch it the other way and it will be sprung to return to the central position, allowing you to make a “momentary” connection.

A lot of this terminology applies to other kinds of switches in addition to toggle switches.

Summary

We now know a bit about voltage, current resistance, and power. In the next chapter, we will use these ideas in looking at how to use LEDs.