AR Drone 2.0 - Is my circuit correct? | 555 Timer Circuits Forum Menu Home Forums New posts Search forums What's new New posts New profile posts Latest activity Members Current visitors New profile posts Search profile posts Log in Register What's new Search Search Everywhere Threads This forum This thread Search titles only By: Search Advanced search… New posts Search forums Menu Log in Register Home Forums Electronics Forums General Electronics JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. AR Drone 2.0 - Is my circuit correct? Thread starter 1app4me Start date Jan 31, 2013 1app4me New Member Jan 31, 2013 #1 Jan 31, 2013 #1 hi everyone I get an AR Drone 2.0 and I want to add some lights on it! 1st of all I have seen this circuit and it will be my base: http://www.555-timer-circuits.com/police-lights.html I don't understand why led 1-2 & 3-4 don't get the same resistor? 4.7K & 470? I want to use this circuit and add a switch, add also a light, and more leds, but before doing the final circuit I want to understand why the resistors are different :/ Thanks Have a nice day!! amazing website and forum is just starting Later if I succeed to do the circuit I will give you a video Admin Administrator Staff member Jan 31, 2013 #2 Jan 31, 2013 #2 Welcome to the forum 1app4me! The colour of the LED is the reason for the different resistor values. Each colour of LED has a different voltage drop and this requires you to adjust the resistors to give the same brightness. Color Potential Difference Infrared 1.6 V Red 1.8 V to 2.1 V Orange 2.2 V Yellow 2.4 V Green 2.6 V Blue 3.0 V to 3.5 V White 3.0 V to 3.5 V Ultraviolet 3.5 V In the circuit it uses red and blue LED's. I used the equation below to work out the red then matched the blue with what I thought was a similar brightness. Code: (voltage applied - forward voltage drop) / forward current = resistor value Red LED: Code: (9V - 1.8V) / .015A = 480 ohms Good luck! 1app4me New Member Feb 1, 2013 #3 Feb 1, 2013 #3 Thanks today I create the complete circuit and post it there to know if its correct. my battery is a 11,1V 1000mAh, must I add a resistor at the entrance? Or must I change the other resistor on the circuit? thanx again ;-) 1app4me New Member Feb 1, 2013 #4 Feb 1, 2013 #4 Now i am not sure lol blue led get 3v for example and you use a 4.7resistor with it... With 9v . So into the resistor this is 6v right? so this is also a 1,2mA and the same on the led. This is weird to get 1,2mA for a led :/ is there a mistake from me? thanks B brandon sikes New Member Feb 11, 2013 #5 Feb 11, 2013 #5 I was working on this project a month ago, and thought the 555 method was pretty much my only choice. But I really didnt want to clutter the inside of my drone with a bunch of parts and pieces. Then by chance I came across this website http://www.modeltrainsoftware.com/ledlights1.html. Unless you just want to build out the circuit yourself or sync the lights in some manner, I would HIGHLY recommend them, they have managed to integrate the necessary components into the LED/ heats hrinked area without needed any other parts aside from a switch (if you want one). They are very cheap and shipped to me very quickly. I put two red/blue fast flash LED's in the back and two larger white ones in the front to assist with night time flying. I would be happy to post a demo video if you would like. 1app4me New Member Feb 12, 2013 #6 Feb 12, 2013 #6 Hi thanks for your answer I have done the circuit on a paper and I am creating an image to show you it Thanks Brandon Sikes, I have already visited this website! cool But I need +/- 100 leds + 1 spot So I am trying to do something personal, you know the personal achievement thing and if it doesn't work sure I will search on it By the way I would like a demo video sure Have a nice day! thanks again! emc2 New Member Mar 29, 2013 #7 Mar 29, 2013 #7 How did you go 1app4me? Got it working? 1app4me New Member Mar 30, 2013 #8 Mar 30, 2013 #8 Hi dude, I am stand by, wait my holiday to continue will post the complete circuit soon to check there Bye Likes: emc2 X xptical New Member Oct 30, 2013 #9 Oct 30, 2013 #9 I've added a lot of LEDs to RC aircraft. I normally use LED strips that take a 2s or 3s LiPo as an input. Anyway, I'd suggest taking the power for your circuit from the battery's balance tap. That way, a screw-up in your wiring won't damage the Parrot's systems. You can usually find standard balance tap connectors online as an accessory pack for an after-market charger. For RC models, the most important thing is to keep it light. "Perfection has been reached not when there is nothing left to add, but when there is nothing left to take away." RFC 1925. You must log in or register to reply here. Share: Reddit Pinterest Tumblr WhatsApp Email Link Home Forums Electronics Forums General Electronics 555 Timer Circuits Style Contact us Terms and rules Help Home Forum software by XenForo™ © 2010-2018 XenForo Ltd.