So, as we principally all know, after we change a headlight lamp with an aftermarket LED one, the LED attracts a lot much less present than is predicted by the pc which may trigger it to throw warnings until the unit incorporates a shunt resistor to attract extra “sacrificial” present, thereby tricking the pc into considering every part is regular.
Right here is the unit that I changed my headlights with, which have a shunt resistor and work high-quality with out throwing warnings.
With this unit, the lamp half mounts the place the halogen bulb would have been. It has fan inbuilt to assist cool the lamp unit. The resistor disc then principally simply must be crammed contained in the housing behind the mud cowl.
The query in my thoughts is what sort of energy does this resistor should dissipate and the way scorching does it get.
Setup
So I wired a spare lamp as much as some wire and plugged it right into a bench provide and taped a thermocouple to the disc to watch the temperature.
Whereas I used to be unsure what voltage is utilized to the lamps within the bike, I made the belief that it’s the full system voltage. So I set the ability provide to 13.7VDC which induced a present draw of about 4 amps. So between the sunshine, the fan, and the surplus warmth, we’re sinking about 55 watts per bulb.
The outcomes
So, I turned the factor on and simply it hold in area whereas I monitored the temperature.
Preliminary and “Last” Temps
So, I turned the factor off at 177 levels F. It was nonetheless climbing, although extra way more slowly. I bought bored with ready at this level. At this temp, it should very a lot burn you.
That is in free area, so it actually makes me marvel what is going on inside the sunshine housing contained in the mud cowl. Additionally, needless to say the LED fan doesn’t blow onto this half. I hope that there’s some stage of airflow by this housing, however I do not know if there’s or not.
What are your ideas? Is that this stage of warmth a doable downside? By the way in which, I did not measure it, however I can let you know that the lamp housing with the inbuilt fan additionally get fairly scorching however not practically as scorching because the resistor disc.
