Moderator drewpy Posted March 13, 2011 Author Moderator Posted March 13, 2011 The circuit ^^^ looks just the ticket i'd just stick a 330ohm resistor (x2) in series with the led anodes, i've never had a problem ballasting LEDs like this. If your concerned about the LED flickering a 1000microfarad (uF) electrolytic capacitor connected between the resistor/led-connection and the cathode of the LED should provide enough smoothing. Make sure it's rated for at least 40v (50V or 63V would be better and probably easier to get). - maplin should have some. Drewpy, procede with caution, as I am thinking this from my knowledge and not from direct testing. will it go bang straight away or pick an inconvenient time to go? Think go for it and get one of the kids to attach that little red wire on the battery while I'll look for that 50p behind the sofa!!
pilninggas Posted March 13, 2011 Posted March 13, 2011 will it go bang straight away or pick an inconvenient time to go? Think go for it and get one of the kids to attach that little red wire on the battery while I'll look for that 50p behind the sofa!! if it works, it'll last a long time. If it don't it'll be seconds! it should be fine. try connecting an 330 resistor/LED to a 12v source, before you build the rest of it (heck you could buy a couple of cheap red LEDs to be sure), and see if it's okay. If it is really bright, it will fail in seconds (unless it's a superbright LED of course). If that's okay the rest of the circuit (and the smoothing caps) should be fine.
barkwindjammer Posted March 13, 2011 Posted March 13, 2011 http://www.autobulbsdirect.co.uk/LED-Resistor-kit-pair.html these ones will only smoke a bit, probably
Moderator drewpy Posted March 13, 2011 Author Moderator Posted March 13, 2011 http://www.autobulbsdirect.co.uk/LED-Resistor-kit-pair.html these ones will only smoke a bit, probably expensive for a pair of resistors BWJ I'm off tomorrow, so its a bike ride out (weather's supposed to be good) and a calll in the Maplins on the way!
up.yours Posted March 13, 2011 Posted March 13, 2011 you should only need a 12v capacitor that you can buy for next to nowt from modern radio neer mcd's in bolton ,you can pop in on yer way home from work. the lady's yes two of them ,,are very nolagable in electronics and will answer any questions you may have..
Moderator drewpy Posted March 13, 2011 Author Moderator Posted March 13, 2011 you should only need a 12v capacitor that you can buy for next to nowt from modern radio neer mcd's in bolton ,you can pop in on yer way home from work. the lady's yes two of them ,,are very nolagable in electronics and will answer any questions you may have.. that's the one near the new uni methinks!
up.yours Posted March 14, 2011 Posted March 14, 2011 yup thats the one...you can park in mcds car park and pop round the corner..get a burger when you get back iff you want to.
Moderator drewpy Posted March 14, 2011 Author Moderator Posted March 14, 2011 yup thats the one...you can park in mcds car park and pop round the corner..get a burger when you get back iff you want to. not eating that shit
up.yours Posted March 14, 2011 Posted March 14, 2011 hey, don't knock it,,im told all the master chefs work in them places..
Moderator drewpy Posted March 14, 2011 Author Moderator Posted March 14, 2011 hey, don't knock it,,im told all the master chefs work in them places.. no that's master bakers
Moderator drewpy Posted March 15, 2011 Author Moderator Posted March 15, 2011 hmm,? are you a cook or a baker neither!
Speedshop Posted March 16, 2011 Posted March 16, 2011 I'll draw you a picture to show how you could get this to work when I get 5 mins
up.yours Posted March 17, 2011 Posted March 17, 2011 have you managed to call into modern radio andy. what did they say. oh,,and what did you think of the young bird,,the one with the piercings,,phrooo
Moderator drewpy Posted March 17, 2011 Author Moderator Posted March 17, 2011 have you managed to call into modern radio andy. what did they say. oh,,and what did you think of the young bird,,the one with the piercings,,phrooo every time i've been past its been shuttered up.
Moderator drewpy Posted March 17, 2011 Author Moderator Posted March 17, 2011 I'll draw you a picture to show how you could get this to work when I get 5 mins I'd appreciate that. I have a sealed reed relay DPST, couple of 330 ohm resistors, and a couple of ceramic caps rated @ 50v. Pillingas has given me good advice up to now, but I'm all for more info! I also managed to get meself a tiny case and mini hobby board for soldering onto. I must be good at soldering as I repaired ny vauxhaull key fob as the battery holder snapped off! cheers drewps
Speedshop Posted March 17, 2011 Posted March 17, 2011 Ta-Dah! you won't need capacitors, just a voltage limiting resistor as per the diagram I'm sure you could use a simple BC547C series transistor in place of a relay. Not tried it, but these are very cheap and easily available.
Moderator drewpy Posted March 18, 2011 Author Moderator Posted March 18, 2011 cool, and with pretty colours. thanks for the diagrams I'm sure they'll help other peeps out
Moderator drewpy Posted April 30, 2011 Author Moderator Posted April 30, 2011 Just to let you know, thanks to the peeps who helped, it works a treat. Got green for neutral, red for high beam and amber if they are both on
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