Vindi_andy
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| posted on 9/3/09 at 10:58 AM |
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Indicators too fast
Ok here goes I am an electronics eng by trade so I understand what should happen and I think I know the reason But i just wanted your input.
Fitted rear LED indicators bought from SVC. Fitted the resistors they supplied for use with them in them live feed to the lights. Fitted front
indicator which is a bulb type big square one also bought from SVC.
They still flash too fast, I suspect the front bulb is a low wattage so not enough combined load. Was getting late last night and I was knackered
from spending the whole day working on the car so didnt take the bulb out to check.
Any other thoughts.
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matt_claydon
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| posted on 9/3/09 at 11:04 AM |
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The resistors should be in PARALLEL with the lights, not series. Remember, you're trying to increase the current draw not decrease it.
(The idea of fitting the resistors across the lamp is to REDUCE the total resistance of the combination; putting them in series with the lamp
increases the resistance and if anything will make them flash even faster!)
[Edited on 9/3/09 by matt_claydon]
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Paul TigerB6
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| posted on 9/3/09 at 11:05 AM |
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Have you fitted side repeaters yet?? Sounds like the overall wattage is still too low so simply fitting the repeaters may solve the problem.
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Agriv8
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| posted on 9/3/09 at 11:06 AM |
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Yes - buy a digital flasher relay from abay for less tha a tenner delivered thats what I did
These will flash the correct pulses regardless of load .
Regards
Agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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02GF74
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| posted on 9/3/09 at 11:10 AM |
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don't waste your money on drop resistors; push the boat out and buy an electronic relay, about a tenner - these do not rely on current drawn.
the drop resistors waste electricity so power that could be used for forward motion is being sapped, albeit a very tiny amount, to heat up the
resistors.
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Vindi_andy
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| posted on 9/3/09 at 11:28 AM |
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unfortunately already bought the resistors so I have already "wasted" my money.
regarding connecting in paralell v series I did say it was late brain wasnt working properly will try that tonight.
God its been a long time since I used my electronic/electrical knowledge in anger.
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MakeEverything
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| posted on 9/3/09 at 11:34 AM |
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quote:
Originally posted by Vindi_andy
God its been a long time since I used my electronic/electrical knowledge in anger.
Erm..... so youre not a practicing electronics engineer then?
[Edited on 9/3/09 by MakeEverything]
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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Project7
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| posted on 9/3/09 at 12:19 PM |
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quote:
Erm..... so youre not a practicing electronics engineer then?
No, he just doesnt get angry usually
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Vindi_andy
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| posted on 9/3/09 at 12:42 PM |
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quote:
Originally posted by MakeEverything
quote:
Originally posted by Vindi_andy
God its been a long time since I used my electronic/electrical knowledge in anger.
Erm..... so youre not a practicing electronics engineer then?
[Edited on 9/3/09 by MakeEverything]
Not for at least 12 years apart from the odd bit here n there
[Edited on 9/3/09 by Vindi_andy]
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splitrivet
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| posted on 9/3/09 at 02:26 PM |
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If your resistors are wired correctly as per Matts post check your bulbs in the front are 21 watt not 10 or 15 as in quite a few foreign imported
indicators.
Cheers,
Bob
I used to be a Werewolf but I'm alright nowwoooooooooooooo
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Meeerrrk
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| posted on 9/3/09 at 11:09 PM |
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how have you connected the resistors, because i quickly fitted some as a trial with those scotch lock connectors and they made such a poor connection,
they werent working properly.
For Sale : 2008 Aries/Stuart Taylor Motorsport Locoblade (954 Blade)
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Vindi_andy
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| posted on 10/3/09 at 09:50 AM |
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They were proper soldered joints with heatshrink over.
Having read the earlier post re resistor and dredging the memory banks for Ohms law it became clearthat I have connected the resistors incorrectly.
Should be paralell not series
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Vindi_andy
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| posted on 11/3/09 at 08:24 PM |
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OK quick update.
Thanks to the reminder about ohms law where P=VI and V=IR regarding the resistors being in parallel to create the additional current drain and
connecting the side repeaters the indicators now flash at the correct speed
Yipee!!!
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