Cheat Sheet

Robot Building For Dummies

From Robot Building For Dummies by Roger Arrick, Nancy Stevenson

Building your own robot takes some mechanical skills — you need to be able to wield a drill, pliers, and screwdriver. Youll also need some technical skills, like knowledge of PBasic so that you can program your robot to do cool things. The following info can be good to have on hand as you build and program your robot.

Expansion Connections and Pinouts for Building Robots

If you’re building a robot, you’re making lots of electrical connections, so you’re dealing with lots of pins. The following table shows the signal for expansion connectors and pin numbers. It can help prevent unwanted cross connections.

Expansion Connector Pin Number Signal Expansion Connector Pin Number Signal
1,2 Ground 16 P11 Green LED
3,4 +5 volts 17 P12 Jumper J7
5 P0 Left whisker 18 P13 Jumper J6
6 P1 Right whisker 19 P14 Switch 1
7 P2 Rear whisker 20 P15 Switch 2
8 P3 Temp sensor 21 RB7 from coprocessor
9 P4 Light sensor 22 Encoder pulse
10 P5 PIR sensor 23 Servo motor #1
11 P6 RC drive motor input 24 Servo motor #2
12 P7 Speech output 25 Servo motor #3
13 P8 Network to coprocessors 26 Servo motor #4
14 P9 Speaker 27–40 Unused
15 P10 Red LED

Common Screw Drill Sizes Used in Building Robots

The following table shows the tap drill and clearance drill bit sizes to use with various screw sizes that are commonly used in robot building. Keeping this information handy can save you some while you build.

Screw Tap Drill Clearance Drill
2-256 .070 (#50) .089 (#43)
4-40 .089 (#43) .116 (#32)
6-32 .106 (#36) .144 (#27)
8-32 .136 (#29) .170 (#18)
10-32 .159 (#21) .196 (#9)

PBasic Programming References for Building Robots

If you’re interested in building robots, you’re going to be working with PBasic, the language used to write code for microprocessors. The following lists tell you how to use PBasic to help program various functions:

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