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Old 03-23-2012, 10:01 PM   #1
jrmc114064
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Looking at a project using some arduino project and to get wireless hooked up i would like to know what the s marked on the receiver means?
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Old 03-23-2012, 10:30 PM   #2
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S stands for Signal. You have Signal= (S) Positive= (+) and Negative= (-)
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Old 03-23-2012, 10:35 PM   #3
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What is the purpose of signal does it limit power output
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Old 03-24-2012, 11:01 AM   #4
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Looking at this and wondering if any knows what signal does on a battery pack and how i can jimmy rig one?
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Old 03-24-2012, 10:38 PM   #5
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The signal pin on a receiver sends a pulse every 20ms with a pulse width that varies from 1ms to 2ms. The width of the pulse tells the servo what position it should be at. 1500-1520us is the center position of the servo and 1ms is the far end of the travel and 2ms is the far end of the travel in the other direction. On gyros and FBL systems they can have a higher frequency for digital servos to update the position quicker. On special Futaba tail servos they have a period of 760us with a shorter pulse width than a receiver.

The signal pin isn't used on a receiver battery pack.

I don't have any experience with Arduino's, but you can create the pulse width with a couple of timers/delays. You would have one timer for the period. When the timer rolls over you would set the pin high. Then use another timer to set the pulse width. When that timer rolls over you set the pin low. Then you repeat.

You can see what the signal is doing by using a timer and a capture feature. You would start the timer when the pin goes from a low to a high. Then you would stop the timer when the pin goes from a high to a low. Then you can use the value in the timer to see how long the pulse is.
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