The 7Seg-DB daughterboard modules each provide four digits of LED display, including some alphabetic and punctuation capability. The master module, 7Seg-DB(M) (#28312), plugs directly into a Parallax motherboard, such as the MoBoStamp-pe (#28300). With the master module installed, up to seven additional slave modules, 7Seg-DB(S) (#28313), can be added, daisy-chain-style, for a total of 32 contiguously-displayed digits. With the downloadable AVR driver firmware, any PBASIC program written for the MoBoStamp-pe gains high-level control over the functions of the 7Seg-DB, without having to worry about display refresh, segment encoding, and the like. Writing to the display is as easy as sending it a string. In addition, you also have several special effects at your disposal, including dimming, vertical and horizontal scrolling, fixed-width numerical fields with leading zero suppression, and selectable display windows. When combined with Parallax's (upcoming) aluminum extrusions - designed especially for the MoBoStamp-pe and its daughterboards - it will be easy to produce a finished-looking controller and display device you can be proud of.

Features & Specifications:

• Plug -compatible with Parallax motherboards (master)
• Displays four digits (alphanumeric characters) apiece
• Daisy-chainable for up to one master and seven slaves (32 digits total).
• Includes shift registers for refresh with 25% duty cycle.
• Includes a dimming input for PWM control of overall intensity.
• Compatible with future daisy-chainable I/O devices.
• Downloadable AVR firmware handles refresh, character display, and special effects automatically.
• Downloadable PC program for creating your own character sets.
• Compatible with both 3.3V and 5V Vdd installations.
• Size: 34mm x 34mm.

Application Ideas

• Annunciators.
• Visual Sensor Feedback.
• Desktop weather stations.
• Debugging output.

Resources & Downloads:
BASIC Stamp MOBO Family Overview
7Seg-DB_doc (.pdf)
AVR_7Seg1_doc (.pdf)
7SegFont Software
7Seg1HEX
Right Marquee
Odometer
Application (zip)
Application Video (zip)