Expansion Connector (J1)
Usage: Connects controller to user devices.
Connector: 40 pin .1 IDC Header
Pinout: | 21 | – RB7 to coprocessor | ||
1 | – Ground | 22 | – Encoder signal | |
2 | – Ground | 23 | – RC servo motor #1 (steering) | |
3 | – +5 volts, 200ma max | 24 | – RC servo motor #2 | |
4 | – +5 volts, 200ma max | 25 | – RC servo motor #3 | |
5 | – P0 of Basic Stamp II, Left whisker | 26 | – RC servo motor #4 | |
6 | – P1 of Basic Stamp II, Right whisker | 27 | – No connect | |
7 | – P2 of Basic Stamp II, to body conn. | 28 | – No connect | |
8 | – P3 of Basic Stamp II, to body conn | 29 | – No connect | |
9 | – P4 of Basic Stamp II | 30 | – No connect | |
10 | – P5 of Basic Stamp II | 31 | – No connect | |
11 | – P6 of Basic Stamp II | 32 | – No connect | |
12 | – P7 of Basic Stamp II | 33 | – No connect | |
13 | – P8 of Basic Stamp II, network I/O | 34 | – No connect | |
14 | – P9 of Basic Stamp II, speaker | 35 | – No connect | |
15 | – P10 of Basic Stamp II, Red LED | 36 | – No connect | |
16 | – P11 of Basic Stamp II, Green LED | 37 | – No connect | |
17 | – P12 of Basic Stamp II, Jumper #1 | 38 | – No connect | |
18 | – P13 of Basic Stamp II, Jumper #2 | 39 | – No connect | |
19 | – P14 of Basic Stamp II, Button #1 | 40 | – No connect | |
20 | – P15 of Basic Stamp II, Button #2 |
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Expansion Port RC Servo Motor Signals
All four RC servo motor signals are available on the expansion connector for use with user devices. These are the same signals available on J2, J3, J4, and J5. RC servo motor signal #1 (J2) is dedicated to the robot’s steering motor. The signals are standard 1ms to 2ms positive going pulses at 50hz which is required by most RC servo motors.
Using very large servos that need a lot of current may require an additional power supply to prevent overload or electrical noise that could crash the Basic Stamp II or coprocessor.
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