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Old Jun 06, 2014, 07:36 AM
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LED light switch with servo?

I have a quadcopter that I've covered in LED lights that are powered by 12 volts, so I plugged them in to a 3S 500mah battery. I would like to be able to turn the lights on and off using a switch on my transmitter, so I've ordered one of these which does exactly that:

http://www.hobbyking.com/hobbyking/s...ed_Switch.html

While I wait four 6 weeks for it to arrive here in Canada from overseas, I've been trying to figure out if I can use a 9 gram servo to do this. I see tons of threads and tutorials powering a single LED from the power coming from the servo, but I can't find out if the servo can be used as a simple on/off switch to complete a circuit from the battery to the LEDs. Anyone know if this is possible or if there is another "hack" solution I could use?

Thanks in advance. I'm off to do some light painting with the quad!
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Old Jun 06, 2014, 01:15 PM
I broke it
David Hogue's Avatar
USA, NC, Clayton
Joined Feb 2001
5,753 Posts
Sure, just attact a "momentary on" micro switch like this to the side of the servo so the arm presses the lever when you actuate it, an there you go.


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Old Jun 06, 2014, 01:41 PM
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I was hoping for something digitally controlled like the HobbyKing switch. I imagine I would have to do it with a pico or arduino or something like that though. Perhaps I will just wait for the Turnigy one to arrive in the mail. I wonder what's on the inside of the Turnigy one though. I haven't seen anybody online try to replicate the functionality with their own components. Seems like a fun project. I've seen people do diversity antenna switching with like $2 of cheap components so creating an off/on circuit completion switch based on PWM input can't be too difficult. I just don't have the electronics skills to pull it off.

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Originally Posted by David Hogue View Post
Sure, just attact a "momentary on" micro switch like this to the side of the servo so the arm presses the lever when you actuate it, an there you go.


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Old Jun 06, 2014, 01:53 PM
I broke it
David Hogue's Avatar
USA, NC, Clayton
Joined Feb 2001
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Well, the board in a std servo will work as a low amp brushed esc, so you could prob just use that and get on/off and dimming. Not sure what if anything you have to do with the pot leads. but you do prob want a servo that the pot is not integrated into the board
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Old Jul 31, 2014, 11:37 AM
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I'm with David on this one. Go to the rc crawler section of your favorite rc parts supplier and get a winch control board. What u will be getting is a robotics servo controler with the pot removed to allow full 360 degree movement in both directions. Of I've been known to use a micro linear servo to operate a small mechanical switch.
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Old Aug 09, 2014, 11:10 AM
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United States, VA, Narrows
Joined Dec 2009
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You can also get RC switches from other sources.

http://www.robotmarketplace.com/prod...nterfaces.html
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