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Professional Development Board (PDB)


The Professional Development Board is a collector’s item now, no longer available from Parallax. In very good condition. This was from my bench collection which I must, sadly, part with.

The photo is for representation only as the revision of the boards may vary. Please see the description below for complete product details.

2 in stock


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.


  • 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
  • DS1307 (I2C®) real-time-clock with 3v back-up battery (pre-installed)