Matt B Posted May 19, 2009 Share Posted May 19, 2009 Fair point, I didn't take that into account. Quote Link to comment Share on other sites More sharing options...
paul2304 Posted May 19, 2009 Share Posted May 19, 2009 any news on the resistor i would have to use ? i just made 2 units up as per the guide and they work fine , had them on for over an hour so far Quote Link to comment Share on other sites More sharing options...
Aterlatus Posted May 20, 2009 Share Posted May 20, 2009 They'll likely work from a fully charged 6V cell because (as everyone already knows) they maintain a slightly higher voltage off a full charge. The resistor to use will vary depending on what setup you're going to settle with. If you're gonna put them all in parallel or try and keep some in series. If you're gonna run them in series on 6V though then you might as well pluck a resistor value outta your hiney because the maths won't add up due to tolerances in the LEDs. Quote Link to comment Share on other sites More sharing options...
Topper Posted May 20, 2009 Share Posted May 20, 2009 Just received the LED's Which ones + and which ones - Long pole short pole ? Quote Link to comment Share on other sites More sharing options...
paul2304 Posted May 20, 2009 Share Posted May 20, 2009 long is + , short is - topper mate , built mine last night Quote Link to comment Share on other sites More sharing options...
Topper Posted May 20, 2009 Share Posted May 20, 2009 Cool beans thanks paul,ill crack on with this in a bit Get some pics up mate Quote Link to comment Share on other sites More sharing options...
paul2304 Posted May 20, 2009 Share Posted May 20, 2009 will do in a bit matey , still tryin to work out how to power them from the 3rd channel on my rx Quote Link to comment Share on other sites More sharing options...
adolf hamster Posted May 20, 2009 Share Posted May 20, 2009 just as a note, there will be a flat portion on the led itself to identify the negative leg, don't go by long and short cos if theyve been cut they could be either one. Quote Link to comment Share on other sites More sharing options...
Topper Posted May 20, 2009 Share Posted May 20, 2009 I might be wrong,but i think you will need a plug on your lights to plug into the receiver,something like a futaba plug or one that is compatable, Then its just a case of flicking the 3rd channel on and of on the tx,i think thats how i would do it,but i aint got a 3rd channel cos of the killswitch just as a note, there will be a flat portion on the led itself to identify the negative leg, don't go by long and short cos if theyve been cut they could be either one. Mine looks like they both have flat portions,ill try and take a pic. Quote Link to comment Share on other sites More sharing options...
Topper Posted May 20, 2009 Share Posted May 20, 2009 Cant take a photo that small,even thats beyond me Pic below shows what mine are like, http://upload.wikimedia.org/wikipedia/commons/e/e8/LEDs.jpg Theres flat bits on both legs. Quote Link to comment Share on other sites More sharing options...
Hiks Posted May 20, 2009 Share Posted May 20, 2009 Anyone wanna knock me up one of these? I'll take the one in blue, might get an electric shock when the fun starts though Quote Link to comment Share on other sites More sharing options...
Topper Posted May 20, 2009 Share Posted May 20, 2009 Im sure Perruzo wouldn't mind the buisiness How long do you rekon that will take ? My led's are cool long + short - Quote Link to comment Share on other sites More sharing options...
Merlin Posted May 20, 2009 Share Posted May 20, 2009 (edited) Tez, i only have one thing to say to you... Edited May 20, 2009 by Merlin Quote Link to comment Share on other sites More sharing options...
paul2304 Posted May 20, 2009 Share Posted May 20, 2009 trust you to lower the tone terry lol have tried a servo extension lead to power the lights off the rx but it dont work , either that or my 3rd channel aint working Quote Link to comment Share on other sites More sharing options...
Hiks Posted May 20, 2009 Share Posted May 20, 2009 Paul, I've got that photo of you and your boyfriend. http://www.unpuppet.com/lovejourney/travel...ket-ladyboy.jpg (she aint left yet btw ) Quote Link to comment Share on other sites More sharing options...
Merlin Posted May 20, 2009 Share Posted May 20, 2009 the lady boys still at yours? man you must have a sore anus. Quote Link to comment Share on other sites More sharing options...
adolf hamster Posted May 20, 2009 Share Posted May 20, 2009 Im sure Perruzo wouldn't mind the buisiness How long do you rekon that will take ? My led's are cool long + short - yep, thats what i meant, its just when you cut the legs you will wish you knew which ones were which Quote Link to comment Share on other sites More sharing options...
Hiks Posted May 20, 2009 Share Posted May 20, 2009 Every hole is a goal! and I'm pele. Quote Link to comment Share on other sites More sharing options...
Aterlatus Posted May 20, 2009 Share Posted May 20, 2009 (edited) I might be wrong,but i think you will need a plug on your lights to plug into the receiver,something like a futaba plug or one that is compatable, Then its just a case of flicking the 3rd channel on and of on the tx,i think thats how i would do it,but i aint got a 3rd channel cos of the killswitch Nope - you've got three lines coming out of an rx - ground, live and signal. The signal wire sends data to the servo/failsafe/other-misc using PWM (pulse width modulation). You need some electronics at the other end to convert those pulses back into a useable signal - usually a dual jk flip-flop (4013) IC. You'd then take the output from the flip flop to 'turn on' a MOSFET (transistor) which would in turn power the lights. The only downside to that is you'd need to know how many amps the circuit can draw to spec up the right MOSFET to use. They're expensive to replace if you get it wrong, and unless you're using a current limiting resistor you'll have no idea what transistor to use. If you were using a resistor, you could get away with a 100 for a quid type transistor. You'd also need to seriously rethink the setup of the LEDs if you go down that road though because the transistor will also have a voltage drop across it, so you'd really have to wire them all up in parallel instead of 2 in series. Edit: My bad, 4013 is a dual D flip-flop, but I tend to just use jk's because they're easily and cheaply available and are able to act as any other type of flip-flop. Edited May 20, 2009 by Aterlatus Quote Link to comment Share on other sites More sharing options...
Topper Posted May 20, 2009 Share Posted May 20, 2009 (edited) There you go paul,you need to do that ^^^ Edited May 20, 2009 by Topper Quote Link to comment Share on other sites More sharing options...
Aterlatus Posted May 20, 2009 Share Posted May 20, 2009 I hope I didn't make it sound complicated.... It's a fairly simple circuit really. No, wait, it's not. It's really complicated and expensive but I'll do you a special offer - I'll sort you one out for Quote Link to comment Share on other sites More sharing options...
Matt B Posted May 20, 2009 Share Posted May 20, 2009 I'd just run them from the external battery. Much easier and cheaper. Quote Link to comment Share on other sites More sharing options...
Aterlatus Posted May 20, 2009 Share Posted May 20, 2009 I'd just run them from the external battery. Much easier and cheaper. If y'all stick to running them without resistors then Matt is right - it's far cheaper to use a separate battery than buy a new rx when you drag too much current through it. Quote Link to comment Share on other sites More sharing options...
adolf hamster Posted May 20, 2009 Share Posted May 20, 2009 i'm voting for perruzo's method; plug it into the charging socket 1 Quote Link to comment Share on other sites More sharing options...
paul2304 Posted May 20, 2009 Share Posted May 20, 2009 (edited) i'll just stick to using an old hump pack i think lol and when did i get dragged into your's and merlins extra curricular games Terry lol well here's my light pods all done and dusted def gonna use the white ones when they arrive though so if anyone fancies a set in blue give me a shout Edited May 20, 2009 by paul2304 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.