Load Resistor Kit for LED Turn Signals - 50 Watts - 6 Ohm - Qty 2. (23 reviews) Code: DI34ZR. Retail: $23.41. Our Price: $8.08. Add to Cart. Accessories and Parts. Trailer Lights. Load-Resistor Kit. Do NOT short the resistor. A resistor is need to allow the LED to operate at its forward voltage. Without a resistor the LED is forced to operate at the battery voltage putting stress on the LED. It is a myth that it's okay to connect an LED(s) directly to a battery. Below is 3 deep blue LEDs at 10 mA.
5. vin17285. • 7 yr. ago. Resistor restrict the flow of electricity. They are really useful when trying to prevent sensitive electronics from breaking. We can use resistors to lower the voltage and also the current if we need to. There's are loads of videos that explain the concept and the math. NeoMarxismIsEvil.
Thanks for the replies, Yes the ATX PSU is rated @ 3.3V (3.5V measured with a multimeter) The LEDs are actually slow colour change LEDs (blue, green, Red) when connected to the PSU the voltage fluctuates between 3.5v and 3.35v during the cycle.
You need the actual V f when selecting the resistor(s). The published values will differ too much and using AA batteries does not leave much wiggle room. Using 3.2V of the Cree LED: At 4.5V the 1% resistor needed for 20 mA is 66.5Ω. At 3.4V the minimum this LED will work properly the resistor would be 10Ω for 20 mA,
This is the reason why it’ll blink fast (hyper-flash). The fix is very simple – install a RESISTOR. This will make your buddy think that it has a bulb in good condition, so it will blink in a normal state. Because our technology is very open to improvements, there are now LEDs that have built-in resistors in it. To prevent hyperflashing with the new LED bulbs on your 1993 Chevy C1500, you will need to add a single Diamond LED Load-Resistor # DI34ZR (which includes two resistors) to each turn/blinker circuit on the truck. If the same circuit wire is feeding into the two bulbs on each side of the truck, you should only need one resistor on each side, in a8V9qB.
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    • do i need a resistor for led