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Expansion Connector (J1)
38
Pinout:
1 – Ground
2 – Ground
3 – +5 volts, 200ma max
4 – +5 volts, 200ma max
5 – P0 of Basic Stamp II, Left whisker
6 – P1 of Basic Stamp II, Right whisker
7 – P2 of Basic Stamp II, to body conn.
8 – P3 of Basic Stamp II, to body conn
9 – P4 of Basic Stamp II
10 – P5 of Basic Stamp II
11 – P6 of Basic Stamp II
12 – P7 of Basic Stamp II
13 – P8 of Basic Stamp II, network I/O
14 – P9 of Basic Stamp II, speaker
15 – P10 of Basic Stamp II, Red LED
16 – P11 of Basic Stamp II, Green LED
17 – P12 of Basic Stamp II, Jumper #1
18 – P13 of Basic Stamp II, Jumper #2
19 – P14 of Basic Stamp II, Button #1
20 – P15 of Basic Stamp II, Button #2
21 – RB7 to coprocessor
22 – Encoder signal
23 – RC servo motor #1 (steering)
24 – RC servo motor #2
25 – RC servo motor #3
26 – RC servo motor #4
27 – No connect
28 – No connect
29 – No connect
30 – No connect
31 – No connect
32 – No connect
33 – No connect
34 – No connect
35 – No connect
36 – No connect
37 – No connect
38 – No connect
39 – No connect
40 – No connect
Usage: Connects controller to user devices.
Connector: 40 pin .1 IDC Header
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.
Expansion Port RC Servo Motor Signals