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2 questions about LED 64
I'm just starting planning of my simpit and have a couple of questions about the LED64...
Is it possible to drive more than one LED from the outputs?
What I am actually trying to do is setup some gear indicators which change colour, green when down/locked, red in transit and off when up. Each indicator has 2 LEDs, I could use as many as 12 outputs (2 Green EA and 2 Red EA) for this but it would be better to use only 6...2 reg or green LEDs per channel.
I know I could buffer the output, but it would be simpler if not needed.
2nd Question
Is there a "Lamp Test" facility built into the LED 64 or the software?
Wiring up the required diodes wouldn't be hard...just tedious. :)
Steve
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You can make a small optimization by wiring the red/green pair into a common cathode, reducing the number of wires from 4 to 3. This still gives you the capability of turning both on at the same time. It's possible to build circuitry can drive two LEDs using two wires, using an H-bridge topology, but we did not use this on the LED-64.
Chester
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Hi Steve (SilverFox). Good to see you here too in addition to SimV.
Great question. It would be nice to have a "system test" available in the pit.... wiothout wiring all those diodes to the individual annunciators.
I'm looking forward to hearing if this is a function supported also.
best,
...................john
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Hi John! :)
Thanks for the answer Chester. I guess I'll rig up some transistors as buffers to sink the required current for the LEDs. :)
The "Test" facility is probably something that we should ask be fitted into FS2Phidget...just designate a "test" switch and it drives the outputs of the LED64. Not hard to implement in the software after all.