hey guys, just wondering what the voltage of output the vtec wire is, cuz i want to make a vtec light, but i have blown 3-4 led's arleady the hyper blue ones, so i just wondering how much voltage it is so i can get a resistor. TIA

 

i will also will like to know..... but my cause its different
i want to know how much voltage the ECU really sends to the Solenoid so i can regulate the amount of voltage the solenoid gets from my RPM switch.....

in my case i am using a regular 12V red bulb from pepboys...very tiny red one with a silver border found in the bulbs aisle......

 

does anybody know??

 

Go to radio shack and get a 12volt led light they should know what your talking about. There multicolored (of course) kinda flat front, have a bolt on them so you can mount them any where and a bout 2inch of wire coming from them. There about 4bucks but they have a resistor built in and will not blow. I used one for several months and it was fine unlike just a LED by itself blows in 2hrs.

 

prolblem here is not the voltage,
the ECU only relay the batterie to the Vtec solenoid,
so it's really the 12 volt of the batterie that come in the vtec solenoid,
now I think that the worst part of the problem is the curent, that should be high enough to fry almost any normal led on the market, the solution would be to get one resistorised led, you could found them in Radio shack, or Futur Shop I think. anyway, they are much stronger but will tend to fry also after a long period of time. A normal light woudn't but if you want to go LED all the way, this is the only thing I can think about !

Hope this help a bit
Kranked19dx


[Modified by kranked91dx, 6:00 PM 2/22/2003]

 

Thats not true, the 12v feed for the vtec solenoid comes directly from the ecu.
Go to radioshack and buy ANY small 12v bulb, or 12v led.
You will not have any problems, just tap the positive into the vtec wire, and ground the other. There is PLENTY of amperage in the vtec wire to light a small bulb or led.

 

so basically the vtec feed is 12 v than
so if i do get a hyper blue led that is 5 v, i have to find a resistor that will resist the other 7 volts? correct?
or get a 5 volt resistor

 

I Rio,

What I was meaning it that there is a relay in the ECU, that click, actually it's not really a relay it's a transistor, so yes the voltage is coming directly from the ecu but it isn't regulated by the ecu, the ecu only engage or disengage the current, and that make the voltage comming from the batterie, passing trough the ecu and go to the vtec solenoid, without any restriction. And yes there is plenty of current there, probably too much, the led won't take only what it need, it will take what we send to it, so if you pass the half of the current in the led, it will certainly blow up.

for your calcul, Voltage = (resistor * current) or E=RI if your more familiar with,

Note: I am Technician in Industrial electronic, dont think I just said something I don't know a **** about.

hope this clarify things a bit
Kranked


[Modified by kranked91dx, 9:05 PM 2/22/2003]

 

kranked
so are you saying that the vtec wire should be 12 volts than?
i dunno, cuz i want to use the 5 volts super blue led
and i have blown them so many times.
i've heard a 330 ohm resistor will do the job? is this true? i don't electronics before but its been a while and i haven't touched electircal work since, so i'm not to sure, can you clear even more things, like give or go, if the ecu is really regulating the vtec wire if voltage ouput? or is it 12 volts straight up, or can you tell me how to test how much volts it pushes out?? thanks krank. getting better understanding

 

you can check your voltage to the vtec solenoid by hooking up a voltmeter to the ecu output wire, and driving your car with a helper that will tell you how much juce is sended up to the vtec solenoid, but I can assure you that it's going to be around 11.5 to 12.2 volt ( according to your batterie )
for your resistance of 330 homs, just use the pevious formule i gave you if you got the current consumption of your led ( wich is normally writed behind the package of the led )
so 12 volt divided by 330 homs give you a current of 36 miliamps, so check your package and if your current is higher than 36 miliamps your led will blow,
come back and tell me if the value of the current your led is consumming and I will tell you the exact value of the resistor you need, if you want.

for the ecu, no, again, it dosn't regulate the voltage sended to the Vtec solenoid, for a fact take: the solenoid is a coil, you know wich does this mean, it's a wounded coil having in it's center a little pointeau that control the feeding of the oil to the vtec mecanisme, wich mean it's a ON / OFF device, you can't engage half of your vtec don't you ??. so you have to give 12 volt to the vtec solenoid, if you want to know how much current is drained by the vtec solenoid, tack a multimeter in mode homs and tes your vtec solenoid, then take those value and do : 12 volt divided by the mesure of your vtec resistance, it will gave you your current.

again if you can come back with the current consumption of your led I will tell you with wich resistor you can put it there.

see ya soon
kranked



[Modified by kranked91dx, 9:52 PM 2/22/2003]

 

hey krank, i will get you the specs of the led, as soon as i go purchase another one hehe
thanks man, i'll IM asap.
thanks dude.

 

Ok!'
come back with that on my mail box please,
stetcher@hotmail.com
thank's a lot,
note, give a subjective subject to your mail cause I receive so much junck **** that if you name it " none " I will probably clear it without any sort of reading.

see ya
Kranked