rlmarshall
New Member
I am building a RV6A and was wondering how I can hook up my electric trim and electric flap indicators to display positions on the EIS?
Thanks,
Thanks,
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Electric Trim and Flap Controls
- Thread starter rlmarshall
- Start date
- Joined
- Mar 23, 2005
- Messages
- 13,226
If you have the Ray Allen trim servos, there this blurb in the installation manual:
If you are using the output from a Ray Allen servo or sensor, connect its white/orange wire to the Dynon 5V excitation line (pin 18), its white/blue wire to ground, and its white/green wire to your GP input of choice.
For any others, a variable resistance on any of the GP inputs will work.
If you are using the output from a Ray Allen servo or sensor, connect its white/orange wire to the Dynon 5V excitation line (pin 18), its white/blue wire to ground, and its white/green wire to your GP input of choice.
For any others, a variable resistance on any of the GP inputs will work.
chipf
New Member
I have a question about this. The Ray Allen T2 servos include a potentiometer to indicate servo position. The green lead is the variable lead, and orange and blue leads are the fixed leads. Orange to blue is 4.8 Kohms, and the variable (green) lead can vary from 8 ohms to 4.8K with respect to the blue lead. As such, the circuit forms a voltage divider, with the recommended hook up measuring the voltage produced.
So why must +5V be hooked up? Why not just ground blue (or orange) and connect the green lead to a GP input? The GP inputs have pull ups of known values, so this would still provide a known voltage that depends on position. This is the way the fluid pressure sensors are all hooked up. This would save having to chop up the +5V line, as well as the need to route another wire up to the panel. Neither of those are too bad to deal with, and I'm not going to change mine now that it's done, but if I had to do it over I would have used the simpler option.
So why must +5V be hooked up? Why not just ground blue (or orange) and connect the green lead to a GP input? The GP inputs have pull ups of known values, so this would still provide a known voltage that depends on position. This is the way the fluid pressure sensors are all hooked up. This would save having to chop up the +5V line, as well as the need to route another wire up to the panel. Neither of those are too bad to deal with, and I'm not going to change mine now that it's done, but if I had to do it over I would have used the simpler option.
- Joined
- Mar 23, 2005
- Messages
- 13,226
In technical terms, SkyView doesn't apply a pull-up resistor when the input is a flap sender. This allows SkyView to support all position senders with a single setting, though this does require additional wiring against what might be theoretically possible with some senders.