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R/C Related Electronics DIY DIY R/C Electronics for tinkerers and the budget minded |
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09-16-2013, 01:02 PM | #1 (permalink) |
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Join Date: Sep 2013
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Rx to trigger shutter?
I'd like to use a spare channel for focus/release on my camera, has anyone done this, either directly to the camera (assuming remote shutter release is to a degree the same for most cameras) of via a cheapy remote release from ebay?
I have the pinouts for my camera, am I right in thinking I would need two channels to do this? One for "half press" and another for "full press" |
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09-17-2013, 11:45 AM | #2 (permalink) |
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Join Date: Sep 2013
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Ok then, lets see if anyone knows this..
Currently a naza m powers my AR7000, if I want to add another rx (gimbal control), do I need to make a voltage regulator coming off the main supply to power it? According to the manual the spare 6200 i have takes 9.6v max or is there any way to power the second rx from the first? |
09-17-2013, 08:15 PM | #3 (permalink) | |
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Quote:
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09-19-2013, 06:23 AM | #4 (permalink) | |
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So my thinking is that with a single channel, using something like an arduino, I can read for position x, fire my focus then after a short delay release the shutter, its a bit hit and miss but I think it will work more often than not. |
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09-30-2013, 08:30 PM | #5 (permalink) | |
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Join Date: Apr 2011
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RXs I have tested outputted the signal at ~3.3V but it is likely some use 5V as well. So not a digital signal, I am sure there are arduino libraries for dealing with RC servo input/output, it is done fairly often. At a basic level, any code for handling PWM can manage these signals, they are short duty-cycle, low frequency (50hz) PWM after all.
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-DX8 -MSH MiniProtos Stretched, SK720, DS95/DS95i, Hyp 4S 25C 2500mAh -MSH Protos Stretched, Brain, Hyp DS16/BLS251, 6S 3000mAh -Goblin 500, HC3SX, Hyp DH16/MKS980BL, Scorp 4015-1100 |
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01-15-2014, 08:30 AM | #6 (permalink) |
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Join Date: Dec 2009
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The PWM from your rx channel is in fact a digital signal. The only thing that makes a signal digital or not is discretization. ie on and off pulses for varying pulse widths.. So you'd want to feed that rx channel to a ucontroller of your choice and configure the capture/compare module for capture mode.. Rising edge will start a timer and falling edge will stop it and store the timer value. This time divided by your known pwm period will give your duty cycle.. As Desertstalker said, youll want to know the exact pulse width your rx is generating at a given switch position so I would measure that directly on a scope so you know what ranges to condition upon.. So you could potentially use a 3 postion switch on that channel and be looking for multiple pulse widths and generating your desired output to your camera based on that data. I hope this helps if not too late..
Regards, Stevenfox905 |
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