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  • Wo1fMane commented on CraftAndu's instructable Homemade Bullerjan Stove24 days ago
    Homemade Bullerjan Stove

    If you trace the front when you trace the back - before you weld the back on - you can save yourself some fiddly measuring and get a better fit.Great project!

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  • How to Install Load Resistors for LED Turn Signal Lights

    You've misunderstand how cars work. No turn signal bulb is anywhere near 50 watts. That's headlight territory. According to your calculations, the resistor will be dissipating more power than the original bulb. Also, my resistor is 6 Watts, not 6 Ohms. I never said how many Ohms my resistor was. Those other resistors need to be 50 Watts because they have too little resistance. You need rethink your approach.By the way, my "insufficient" resistors are still working fine more than a year later. But that's only because I haven't had the spare time to track down why the flashers I've tried to use don't work in spite of the pinout being correct according to the wiring diagram and the markings on the OEM flasher. Sooner or later, the resistors won't be necessary.

    Using load resistors on headlights is a very bad idea because they are always on and draw a lot of current/power and you will be creating a major fire hazard.Look for "CAN bus compatible" bulbs, disconnect the instrument panel bulb (or just cover it with opaque tape), or stick with OEM bulbs. Never use load resistors on headlights.

    The problem is that's not as easy as it sounds. In order to wire the resistor in parallel with the bulb(s) you would in effect be shorting the relay, which would completely bypass it and turn the load resistor into a current limiting resistor.

    Pretty much all vehicles have this issue, because it is deliberately designed in. Even newer vehicles that have factory electronic flashers rather than bimetallic strip flashers are designed to work this way. If you can't replace the flasher you're better off just sticking with incandescent bulbs.

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  • Thermochromic Temperature & Humidity Display

    That's awesome! It's mesmerizing, ironic and perfect.

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  • How to Install Load Resistors for LED Turn Signal Lights

    They do make CAN bus compatible LED bulbs.

    You're wrong, and completely missing the point. The point is that you need those high power resistors BECAUSE THEY ARE GOING TO DRAW A LOT OF POWER. If a small resistor would do, then you're drawing a small amount of power and it's no big deal. But the fact is, you HAVE to use those big resistors because they WILL draw nearly that much power, and then dissipate it as heat. It is hugely wasteful (and sometimes dangerous, because those resistors can get VERY hot) and defeats most of the benefit of using LED lamps.

    Not necessarily. Not all vehicles are wired the same, or that simply.

    See above. The point is that the whole point of those resistors is to draw enough power to "fool" the flasher into thinking you're using an incandescent bulb. So yeah, they're drawing a significantly large percentage of their rated power, and defeating the major purpose of LED lights, which is to save power and not throw off a bunch of waste heat.

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  • How to Install Load Resistors for LED Turn Signal Lights

    Wiring the resistor in parallel (which is the only way your calculation makes sense) is a huge waste of power and actually increases the load on your electrical system over stock incandescent bulbs, which is really dumb and lazy. If the LEDs can't function with the resistor in series, then they are poorly designed and made and you shouldn't be using them.The right way to fix the problem is to replace the flasher with one that flashes at the same rate regardless of the load, so it works with both LEDs and incandescent lamps in any combination. It saves energy and requires no modifications to your vehicle at all. Plug and play. Most people who don't properly inspect their own vehicles for proper function of basic equipment like lights don't know or care what that fast flashing means anyway.

    There are too many problems with your calculations to list. But a glaring problem is that the resistors' values aren't actually given. Using that calculator, the 6 Watt resistor would have to be 32 Ohms, and the 50 Watt resistor would have to be 4 Ohms. But that ignores the rest of the circuit and that calculator only works for a single component. If you put a 4 Ohm resistor in series with the LEDs, and assuming the LED lamp draws a generous 1 Amp, you get a power dissipation of only 4 Watts and a voltage drop of 4 Volts across the resistor, which leaves 10 Volts for the LEDs. That's well within the operating specs of everything.

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