28138 Parallax Inc, 28138 Datasheet - Page 8
![BOARD DEV PROFESSIONAL](/photos/9/22/92264/mfg_28138_sml.jpg)
28138
Manufacturer Part Number
28138
Description
BOARD DEV PROFESSIONAL
Manufacturer
Parallax Inc
Series
BASIC Stamp®r
Type
MCUr
Specifications of 28138
Contents
Development Board
Processor To Be Evaluated
SX28AC/DP
Interface Type
RS-232
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
BASIC Stamp®, Javelin Stamp, and SX28AC/DP
For Use With
900-00014 - SERVO CONTROLLER PICO GWS130-28029 - KIT PARTS SMART SENSORS27957 - MANUAL USER FOR JAVELIN STAMP28138 - BOARD DEV PROFESSIONAL805-00006 - CABLE USB A TO MINI B27937 - MEMORY STICK DATALOGGER658-1021-5 - PROGRAMMER TEACLIPPER/STAMP30010 - BASIC STAMP LOGIC ANALYZER27220 - BOOK STAMPWORKS27330 - PROGRAMMER STACHE BASIC STAMP27218 - MANUAL BASIC STAMP VER 2.0
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Audio Amplifier (X7)
The onboard audio amplifier includes a filter circuit that is ideal for commands like SOUND (BS1 and
SX/B), FREQOUT (BS2-family and SX/B), and DTMFOUT (BS2-family). A jumper allows the use of an
external 8 Ω speaker when additional volume is required.
L293D Push-Pull Driver (X8)
The L293D push-pull driver allows the experimenter to control high-current devices like relays, solenoids
lamps and motors to the PDB. Its push-pull configuration (which means it can sink or source current on
its output pins) with active-high enable inputs makes it ideal for creating h-bridge motor driver circuits, or
for driving unipolar and bipolar stepper motors. Note that the output-high voltage must be supplied to the
V+ terminal.
When the enable inputs are high the outputs will follow the inputs, otherwise the outputs will be in a Hi-Z
state.
See the L293D documentation (available separately) for additional details on use and
configuration.
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© Parallax, Inc. • Professional Development Board (#28138) • 06/2005