Gear logic with fsbus CCC.

[jan737]

Hi

Has somebody already made the gear logic with CCC.
I'm looking for the logic of the B 737NG.

Kind regards

Jan Geurtsen.

[Mathew]

Hi Jan,

sorry but i never realized there was a difference to the standard Microsoft gear.
Wha do you expect to happen or what is the difference - as i am building a 737 myself this aspect has really got me interested - and maybe i can help in development.

Mathias

[jan737]

Hi Mathias,

It's not realy different from the standard, but I like to simulate
the gear led's.
This is meaning that when the gear is going down the red light's are on when the gear and doors are in transistion,then when the gear is out the red led's are going out and the green led's are on.
When the gear is in the up position the greens are going out and the red'ds are on for a while and go out when the gear and doors are fully up and the doors are closed.

This needs a bit of logic to program this in fsbus so I was wondering if somebody has found a solution for this.

Greetings

Jan.

[Mümmel]

Hi Jan,

maybe this is useful for you:

http://www.wcm.at/forum/showthread=1...highlight=Gear

[Mümmel]

Sorry, the links semms not to work...

This was the original posting:

Hi!

There are these offsets in FSUIPC:

2AB8 Nose gear extension (as a 0-1 fraction) - FLOAT64 ?

2AC0 Left gear extension (as a 0-1 fraction) - FLOAT64 ?

2AC8 Right gear extension (as a 0-1 fraction) - FLOAT64

I would guess you make the green led light up when the gear is fully extended (1) and the red when the gear is over 0 but less than 1. AFAIK you can set "threshold" values for when leds light up.

One probably can use a two-color led or just have two sets of leds, both setups are found in real aircraft as well ("three green" and one or three red for "in transit")

[jan737]

Hi Volker,

I've looked in the fsuipc offset list but couldn't find the offsets that you mentioned.
I've fsuipc for programmers 23 from Peter Dowson.

Kind regards

Jan.

[Mümmel]

Hi Jan,

sorry - I do not use FSBUS for myself. I just took out the posting from an earlier thread and thought it might help you...

But one other suggestion: There is a little circuit to realize your intention - I got it from the DIY manual from Roland van Roy. See below:

Gear up / down indicator. - Part 1) of picture

When moving the gear lever up and down, the gear indicator lights are changing as well. For most light aircraft, there are three green gear down and locked indicators, and one red gear in transition indicator. Although the flightsim screen will also show them, I found it handy to have real lights next to the gear handle as well.

From the sim, you can check the light sequence and timing, and with a small circuit driven from the gear lever switch, you can make the four lights behave in the same manner.

[Mümmel]

Picture part 2):

The above circuit shows the gear lights driving circuit and the connection to the gear lever switch.
In shown position, the gear switch output is low. This should correspond to gear up position.
The three upper LED’s and the red LED are dark.
When the gear switch is flipped to gear down position, the upper one-shot gets triggered, and produces a positive pulse of about 4.7seconds at the Q output. (determined by R*C of the upper one shot timing components) This pulse drives the lower transistor and the red LED will light for 4.7 seconds. At the same time, Q of the upper one-shot produces a low (going to 0V) pulse of 4.7 seconds. This pulse will pull down the base of the transistor that drives the three gear down LED’s.
After 4.7 seconds, Q goes low, and Q goes high. The red light goes out, and the green lights light-up driven by the high output of the gear switch.

When the gear lever is again pushed in the gear up position, the switch output goes low, and the green lights go out. At the same time, the lower one-shot is triggered, and its Q output sends a high pulse of 4.7seconds to the red LED driver transistor.

You can change the gear transition time by changing the 470k resistor value or the 10uF capacitor value of upper and lower one shots: Upper determines up à down time, lower determines the downà up time.

[Mümmel]

Picture part 3):


wiring...


Hope this is something useful for you...

Best regards

[jan737]

Volker thanks again for you input.

I made this circuit a couple of years ago and it works fine.
But now I try to made this with the CCC logic of fsbus.
So I'll look into the schematic again and try to find out how to inplement this in the logic.

Jan.