VIPCO LED display

Project: VIPCO LED display
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Members	Xopr, Da Syntax
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VIPCO LED display, euro coin as size reference, complete with self-projection

Got a hold of two VIPCO displays (120x32 red pixels), which currently are not working yet.

Specs

• 120x32 red LEDs
• Driven by HD64180RP6 datasheet
• Controlled by RS232 and probably RS485
• display works per 2-line driven by TIP107

Other ICs (vertical control)

• ULN2003A (High-Voltage, High-Current Darlington Transistor Arrays datasheet)
• CD4514BE (CMOS 4-Bit Latch/4-16 Line Decoders datasheet)

Other ICs (horizontal control)

• ULN2003A
• HCF4094A (8-stage shift and store bus register with 3-stage outputs, datasheet)

Pinout =

While the PCB segments are designed to first shift in data for the top 16 leds (24 wide) and then the bottom 16, at least the display without serial connector is modified to use 2 bits per clock (top and bottom half).

back side (top right)
----------+
    VCC oo|data2
    VCC oo|VCC
  clock oo|D
 strobe oo|C
  data1 oo|B
inhibit oo|A
    GND oo|GND
    GND oo|GND
          |

Where:

• VCC is roughly 7.8v without load
• data1 is top 16 LEDs shift register
• data2 is bottom 16 LEDs shift register
• A+B+C+D is row select
• inhibit is the row 'strobe'