Parallax, Inc. • BASIC Stamp HomeWork Board ver 1.1
Page 3
Figure 1
StampLab printed
circuit board keyed
with part
identifications.
Reset
(916) 624-8333
www.parallaxinc.com
www.stampsinclass.com
Rev A
STAMPS
CLASS
in
© 2002
Power
X3
Vdd
Vss
Vin
P15
P14
P13
P12
P11
P10
P9
P8
P7
P6
P5
P4
P3
P2
P1
P0
X4
B
A
C
D
E
F
H
G
G
BASIC Stamp HomeWork Board
A.
BASIC Stamp 2 Module.
The BASIC Stamp is comprised of several components: PIC16C57-20/SS
- a Microchip 2K 8-bit microcontroller programmed with the the BASIC Stamp “Interpreter” that runs
the Parallax BASIC Stamp code like a mini operating system; the 24LC16B EEPROM - a Microchip
2K EEPROM (electrically erasable programmable read-only memory) with a user-modifiable read-
only memory (ROM) that can be reprogrammed with your BASIC Stamp code; a 20 mHz resonator
to provide an accurate clock source for the BASIC Stamp; 220 Ohm resistors across the I/O pins to
provide current protection for mistake wiring; an LM2936 voltage regulator which provides 50 mA for
the BASIC Stamp and your circuits powered from the breadboard’s Vdd connection.
B. DB-9
Female.
The DB-9 port connects via serial cable to your PC’s serial port. This port is used to
download programs to your BASIC Stamp and for the BASIC Stamp to send data back to the PC.
C.
Power and Ground Connections.
Vdd is regulated 5V, Vin is 9V from the transistor battery, Vss is
ground.
D. Breadboard.
Two areas of 5 column x 17 row breadboard project area. Connections are horizontal
separated by the trough.
E. Power
Button.
Illuminated when the BASIC Stamp is running a program only.
F. Reset
Circuit.
Reset the BASIC Stamp by pressing this button.
G. Battery
Tie-Downs.
If using the HomeWork Board Through-Hole Version for projects involving high-
vibration (on R/C airplanes, robots, etc.) a “zip-tie” can hold the battery firmly to the board if looped
through these holes.
H. Power
Supply.
Accepts a 9V battery.
