IO4-SignalDriver-Small
IO4 Output adapter driver for a 2-head signal mast
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.
|
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.
|
|
|
|||
|
|
|
UNPUBLISHED
This technical documentation is licensed under the CERN Open Hardware Licence v1.2