DOA 7seg

DOA_7seg (Rev.1)

Jumper selectable to either

• common cathode
• common anode

Along with the Jumper selection via JP1, the suitable driver chip has to be used for IC4 and IC5.

Features

• select common cathode or anode via JP1 and IC4/IC5
• 32 displays per board or 256 LEDs or any combination
• small boardsize: 80x100mm or 1/2 Euro size.
• dimming possible
• no ghosting
• hi current displays supported (25mA max. per segment)
• all segments individually controllable
  • ie. the dot
  • allows you to create certain characters, like a capital 'A' or 'C', a lower case 'd',...
  • individual segments fully controllable by host software
• of course, instead of 7segment displays you can also use LEDs (8 LEDs instead of one display, 16 instead of two,...)
• controlled via the PHCC DOA bus with the AP2P Protocol.
  • multiple display controllers can be connected to the DOA bus...
  • along with other DOA bus devices (up to 256 devices currently)

Example Setup

Example Setup

Example Wiring Diagram

The following graphics shows how displays are wired to the 32x DOA_7seg boards:

PHCC_7seg Wiring Diagram

Schematic and Board Layout

Rev.1 Schematic

Rev.1 Layout

Bill of Materials

see download page.

Eagle and Gerber files

see download page.