MyFirstBoeing Blog

FSIO-Gen-I/O board

FSIO General I/O board has been designed to allow interfacing inputs and outputs to the simulator hardware.

Inputs There are 4 input 74LS165 ICs providing total total of 32 inputs available on the board. Input devices (buttons, switches, encoders etc.) can be connected to the board with the use of IDC-10 connectors. Each single IDC-10 socket is connected to 8 inputs on a single chip providing: IC1_OUT – inputs 0 to 7, IC2_OUT – inputs 8-15, IC3_OUT – inputs 16-23 and IC4_OUT – inputs 24-31. REMARK: Although socket names shows _OUT in the name on the silkscreen layer, these are INPUTS and no OUTPUTS here. Descriptions will be corrected to _IN in a future release.

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FSIO-Input-72 board details.

FSIO-Input-72 board provides 72 inputs available for the simulator input devices (buttons, switches, rotary switches, encoders). IDC-10 socket connector and a corresponding ribbon cable is used for the connection.

FSIO-Input-72 board

A single IDC-10 connector allows to connect:
– eight single input devices (pins 1-8)
– GND signal (pin 9)
Pin number 10 is not used.
There are 9 IDC-10 connectors in total on the board, thus 9 x 8 inputs = 72 total inputs available.
FSIO-In and FSIO-Out connectors allows to connect the board to FSIO Input/Output chain.

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FSIO – lamp test

Here is the exciting moment. After connecting Overhead LEDs it is time to see whether it works or something needs to be fixed. There is “lamp test” function programmed into the FSIO switching on all FSIO connected outputs, simply triggered by right FSIO-CPU-Board push button. Remember, the left push button is assigned to RESET and accidentally pressing it will temporarily disconnect the CPU board.

CPU board prototyping

The first CPU board prototype is working.

The copper clad with traces has been etched at home, at a time when children were at school.

After etching and cleansing with water the holes were drilled on a CNC machine. You can see the CNC in action here:

A little bit of time spent on soldering components, inserting the CPU and board is ready for testing.

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