CHAPTER 13 ■ SOLDERLESS BREADBOARD SETUPThe negative terminal of the 9 V battery is always connected to the negative bus on Sandwich’s circuit
board. The power switch has one end connected to the positive terminal of the 9 V battery and the other end
to the positive bus. All of this is just like on your solderless breadboard.
When you flip the robot’s power switch on, the power flows from the positive terminal of the battery
through the switch to the positive bus, through the various circuits, into the negative bus, which leads back
to the negative terminal of the battery.
I admit that Sandwich’s board is pretty messy. Also, some of the parts, like the switches, have been
stretched off the board via wires. But the only significant difference between Sandwich’s breadboard and a
solderless breadboard is that Sandwich’s parts are soldered together rather than pushed into little group holes.
Ready for More
Your solderless breadboard has been prepared. It’s ready to supply power to its wide-open spaces with a flick
of a switch. You know how to test voltage at any point to make sure the values are in the ranges that the parts
can accept.
Are you ready to learn about some new parts, such as sensors, and add them to your breadboard?
Figure 13-13. Sandwich’s circuit board with power buses