Web Site: www.parallax.com Office: (916) 624-8333 Forums: forums.parallax.com Fax: (916) 624-8003 Sales: sales parallax.com Sales: (888) 512-1024 Technical: support parallax.com Tech Support: (888) 997-8267 Professional Development Board ( 28138) The Parallax Professional Development Board (PDB) is high-quality, fully-integrated development platform for BASIC Stamp , Javelin Stamp, and SX28AC/DP microcontrollers. A wide variety of typical I/O (LEDs, LCD interface, buttons, etc.) devices and circuitry are built into the PDB, providing the developer with an ideal platform for rapid microcontroller project development. Features 40-pin DIP socket (for BASIC Stamp 2 series and Javelin Stamp modules) 14-pin SIP socket (for BS1-IC) 28-pin skinny DIP socket (for SX28AC/DP) USB, DB-9, BS1, and SX-Key programming connectors 2.1 mm, center-positive connector for DC power 5 volt, 1.0 amp power-supply with power switch 16 discrete LEDs Five 7-segment (with decimal point), common-cathode LED displays Parallel LCD interface may be configured in 4-bit or 8-bit mode Two servo-compatible headers Two 10 k potentiometers Audio amplifier with built-in speaker with switch for external speaker L293D high-current driver for motors, solenoids, etc. Eight, normally-open pushbuttons (I/O lines protected, and pulled-up to Vdd via 10K) Eight DIP switches (I/O lines protected, and pulled-up to Vdd via 10K) Pulse generator with selectable frequency (1 Hz, 10 Hz, 100 Hz, or 1 kHz) RJ-11 connector configurable for X-10 and 1-Wire communications RS-232 DCE port with MAX232E transceiver 2 DS1307 (I C ) real-time-clock with 3v back-up battery (pre-installed) Copyright Parallax, Inc. Professional Development Board ( 28138) v2.0 9/3/2008 Page 1 of 10PDB Power and Programming Connections A) Power switch B) 2.1 mm power connection, center positive, input voltage 6-12 VDC C) Serial programming interface, DB-9 D) BS1-IC, BS2-224, BS2-40 and Javelin Stamp sockets E) BS1 Serial Adapter connection F) Sixteen blue discrete LEDs G) Five blue 7-segment LED displays H) Parallel LCD interface with contrast pot (4/8-bit modes supported) I) Two servo headers (can also be used for Parallax Serial LCD displays and PING))) sensor) J) Two 10K potentiometers K) Audio amplifier with volume control (speaker on-board/ext selectable) L) L293D high-current quad half-H driver M) Eight active-low push-buttons with 5V pull-ups N) Eight active-low DIP switches with 5V pull-ups O) Pulse generator with 1Hz, 10Hz, 100Hz and 1kHz selectable output P) RJ-11 connector for X-10 or 1-Wire I/O Q) MAX232E RS-232 DCE line driver 2 R) DS1307 I C real-time clock with 3V battery backup S) SX28AC/DP socket T) SX-Key/SX-Blitz programming connection U) Solderless breadboard for connecting external components Copyright Parallax, Inc. Professional Development Board ( 28138) v2.0 9/3/2008 Page 2 of 10