IO4-SignalDriver-Small

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IO4 Output adapter driver for a 2-head signal mast

IO4-SignalDriver-Small-Graphic
IO4-SignalDriver-Small-Graphic

 

Download IO4-SignalDriver-Small_array.scr - Eagle SCRipt

 

IO4-SignalDriver-Small Version 1.0

First built: 2019.09

Takes an IO4-Output and drives 2x 3-LED common Anode signal heads using a demultiplexor logic chip. Designed in conjunction with Jay Beckham for his South Shore Lines layout Circuit info:

  • The board is driven from an IO4 port that carries +5, GND and 4x output signals.
  • Signal heads / LEDs are “common anode” - pin4 of the signal head connector is VCC, the “colors” pins are driven LOW to energize the LED.
  • The board can drive 2x signal heads, each with R, Y, G and DARK aspects
    • Control signals 1 & 2 and 3 & 4, each control one head:
      00 - Green
      01 - Yellow
      10 - Red
      11 - Dark
  • This board does not have provision for adjustable LED brightness. The resistors are fixed at production time for high efficiency LEDS used in SPCoast’s Simple Signal masts.

Schematic
Schematic
Bot Silk
Bot Silk
Board
Board
Top Silk
Top Silk
Bot Silk
Bot Silk
Board
Board
Top Silk
Top Silk

Download IO4-SignalDriver-Small.gerbers.zip - Gerber Fabrication files
Download IO4-SignalDriver-Small.parts - Parts List (spreadsheet data)
Download IO4-SignalDriver-Small_array.gerbers.zip - Gerber Fabrication files
Download IO4-SignalDriver-Small_array.parts - Parts List (spreadsheet data)

 

IO4-SignalDriver-Small.bom

Parts Value Package Quantity Library Type/Feeder
C1 0.1UF 0603-CAP 1x SPCoast 19
R4, R8 1k0 0603-RES 2x SPCoast 41
R6, R7, R9, R10 2k2 0603-RES 4x SPCoast 42
HEAD1, HEAD2 2mm 4P-2.0 2x SPCoast PTH
CON4, CON5 3.5mm SCREWTERMINAL-3.5MM-4 2x SPCoast PTH
IC1 74HS139A SO16 1x SPCoast NONE
FID1, FID3 FIDUCIAL FIDUCIAL_1MM 2x SPCoast NONE
U$1, U$2 MOUNTINGHOLE MOUNTINGHOLE 2x SPCoast PTH
IO4 RJ12/6 RJ25-INVERTED 1x SPCoast PTH

IO4-SignalDriver-Small_array.bom

Parts Value Package Quantity Library Type/Feeder
C1X11, C1X12, C1X21, C1X22 0.1UF 0603-CAP 4x SPCoast 19
R4X11, R4X12, R4X21, R4X22, R8X11, R8X12, R8X21, R8X22 1k0 0603-RES 8x SPCoast 41
R6X11, R6X12, R6X21, R6X22, R7X11, R7X12, R7X21, R7X22, R9X11, R9X12, R9X21, R9X22, R10X11, R10X12, R10X21, R10X22 2k2 0603-RES 16x SPCoast 42
HEAD1X11, HEAD1X12, HEAD1X21, HEAD1X22, HEAD2X11, HEAD2X12, HEAD2X21, HEAD2X22 2mm 4P-2.0 8x SPCoast PTH
CON4X11, CON4X12, CON4X21, CON4X22, CON5X11, CON5X12, CON5X21, CON5X22 3.5mm SCREWTERMINAL-3.5MM-4 8x SPCoast PTH
IC1X11, IC1X12, IC1X21, IC1X22 74HS139A SO16 4x SPCoast NONE
BOARD BOARD BOARD-10X10-2X2-PANEL 1x SPCoast PTH
FID1X11, FID1X12, FID1X21, FID1X22, FID3X11, FID3X12, FID3X21, FID3X22, FIDLR, FIDUL FIDUCIAL FIDUCIAL_1MM 10x SPCoast NONE
U$1X11, U$1X12, U$1X21, U$1X22, U$2X11, U$2X12, U$2X21, U$2X22 MOUNTINGHOLE MOUNTINGHOLE 8x SPCoast PTH
IO4X11, IO4X12, IO4X21, IO4X22 RJ12/6 RJ25-INVERTED 4x SPCoast PTH

This technical documentation is licensed under the CERN Open Hardware Licence v1.2

Tags: eagle SPCoast