Hi Karl,
I've completed all the printing and most of the wiring for the 757/767 throttle quadrant, and must congratulate you once again on a superb design!

I do need some clarity on how you have wired the LED's for the annunciators. From your Build Video in which you bend and solder pairs of leads together, I surmise that you connected each pair of LED's in parallel to a single Arduino pin, as this wiring diagram from your 737 overhead would also seem to attest:

Is this correct?
If in parallel, are you using any resistor(s) in series with each LED? And would it be necessary to use an external 5V power supply in this case?
Alternatively, could one connect pairs of LED's in series to a single Arduino pin, as has been suggested elsewhere? If in series, is there a need to also connect a resistor in series as well, and if so, what resistance value would you recommend?
I look forward to your response.
Chakko.
Hi Karl,
I completed assembling the unit today, as you can see below, except for the annunciator slabs, for which I need to find some suitably opaque black paint:
The red LED's within the fuel cutoff switches are not operational, as I found they cannot be wired independently of the switch connections.
For the interface card I used an Arduino Mega 2560, because it handles all the inputs and outputs with ease:
I printed a base for the Mega, so that the protruding terminals at the back would not be shorted by the metallic screws on the spoiler assembly. It was a tight fit, and I had to to bend the pins on the DuPont male connectors into an "L" to get them to fit in the space between the left and centre units. Here is a closer look at the wiring just prior to final assembly:
I also completed the Arduino sketch, and a corresponding FSUIPC4-LUA script to interface with my Level-D B767 on FSX. Of course, I used Nico Kaan's lekseecon module to achieve this. Everything works, except for the Engine Fire LED's and the REV ISLN annunciator, for which there are no offsets/control variables in lekseecon anyway.
This was an excellent design, Karl, and I am looking forward to your motorized B737 throttle.
Hi Chakko! Yes you must use resistors! These are placed on my Arduino prototype shield. I will try and find out the specs shortly and dig out a few photos. Kind Regards Karl
Hi Karl,
I await your response, but in the meantime, I have opened a thread on the Arduino forum to discuss this issue:
Thanks,
Chakko.