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Store Online For Discount + Fanatics Men's NFL Fundamental Trucker Snapback Hat Cheap Online Hot Sale Industrial Scientific => Industrial Electrical => Optoelectronic Products I put one of these diodes on a lab power supply set at 3 volts for six hours. At that voltage, it consumes 14ma of current and is VERY bright. After six hours there are no problems, the current is dead on steady, and it is just warm, not hot.I conclude 3 volts is a good setting for this LED.The calculation for finding the current limiting resistor desired ( a resistor in series with the LED) for this 3 volt LED at 14ma is simple,( using a battery also in series). Here are examples:R =(Battery voltage - LED voltage )/ Led Current in ampsFor a 6 volt battery: R = 6-3/0.14 = 214 ohmsFor a 12 volt battery: R = 12-3/0.14 = 642 ohmsNote that resistors do not come in every value, so choose the next larger one.For a 1% tolerance resistor, use 215 ohms and 649 for the above.For a 5% tolerance resistor, use 220 ohm and 680 ohm.The enclosed 430 volt resistors works well with a 10 volt power supply.Five bucks for a hundred (5c each) seems like a bargain.These came today and I stuck one into a little joule thief just to see how it compares to the other warm white LEDs I had, and it is much nicer. I got the Chanzon warm white LEDs last year, and the colour of them looks pale and sickly, but these new ones are really warm and look lovely, they are just what I was hoping for.I also tried one on a 5v switched-mode power supply, with one of the supplied 430 ohm resistors, and that is nice too. I have not built many circuits on a 5v supply, so I dunno if I will end up needing all those resistors, but it's nice to have them, and given the price, they're basically a free addition, as compared to other manufacturers that don't supply any resistors.I will definitely buy more LEDs from this manufacturer if I need more or other colours, amp;c.If you want to use the transitioning RGB LEDs to do any kind of project that calls for more than one LED at a time, forget it. To use all of the LEDs in the pack, you'd need to use them on 100 different projects. No two LEDs in the pack have exactly the same cycle duration so if you use more than one, they will be showing different colors at the same time, defeating the elegance of having RGB LEDS. Also, if you use more than one of them in a circuit with a resistor, the transitions will become more like flickers rather than smooth color changes. These can run on almost no power. Just the induction from an adjacent circuit can make it light a little if ground is shared only. That effectively is running on no power to it. With a 12v source, using 10k resistor it still is as bright as a normal led. If there is a load in parallel (relay, resistor, etc) it shunts down induction lighting and works more like a standard sensitivity led input. Super bright when using the included resistors. I've had these before and have measured that they will run on 1ma (12v with high value resistor) of power and probably last nearly forever that way. Being 3mm, their use would be for indicators and such, not lighting a larger area (of coarse).I bought three packs of these: one 3mm(warm white, flat lens) and two 5mm(warm white, flat lens). I would expect them to have the same color, but I was wrong. All three had different color. The two 5mm packs that were shipped in the same order had the same product number were absolutely different in color, as you can see in the attached picture. The 3mm ones were somewhere in between them, closer to left whitish 5mm LED.I also tried another LEDs of the same manufacturer that were described as "Warm White Diffused Round Lens", and those were also acidic yellow-greenish (as the right LED on the picture), not warm white at all.I had to return all the acidic white ones and reorder hoping to get LEDs from a good batch.These are nice, bright, inexpensive color changing LEDs. I've used mine to make USB powered, rectangular grid decorative lights, and they work quite splendidly.A note for other potential buyers though: cheap color changing LEDs like this WILL NOT remain synchronized for more than one or two cycles. If you need color changing LEDs to synchronize, you have to get ones designed specifically for that feature (if they exist), or get RGB LEDs and control them using a micro-controller or some other similar method. I used this product in my car, to bring life to my personal upholstery design. The lights are very bright.. but perfect. The only thing I'd give advise for is be careful when wiring up to something,if it requires you to twist the wire connected to the diodes don't bend them too much..as they are aluminum..which is soft and can break easily ....also the LEDs have two wires one longer than the other.. the longer of the two is the positive which is also the one the resistor connects too.. everything else a breeze ????The LEDs themselves are great, I love how easy it is to get some animation in my lighting, and a combination of the slow and fast flashers is really neat. I do want to note that the resistors that they sent are labeled as 430 ohm but are in fact 430k ohm. Needless to say, unusable for this purpose. Regardless of that though, the LEDs are neat and that's what I bought this for, not the resistors, so I am happy :) Overseas parallel import regular item Product Overview: 100 pcs LED Diodes + 100 pcs Resistors Product Features: White Lights / 5mm Flat Clear Lens Lens Product Parameters: 29mm Long Lead / DC 3.0V-3.2V (IF=20mA) / 0.06 Watts / 2pin / DIP LEDs Product Parameters: Luminance Brighter Up To +20% / Wavelength 6000K-9000K / 60° Viewing Angle / Single LED Diodes Wight: 0.24g Accessories: 100pcs 430ohm (For DC 6-12V) 1/4 Watt Metal Film Resistors Include / ±1% Tolerance Product description Color:[03] White / 100pcs  |  Size:5mm Flat Top * Low Energy Consumption And Low Heat. * Industrial Standard Size,29mm Long Lead for widely used and convenient for cperation.* Soldering Condition (Manual Soldering):Less Than 3 Seconds With 482°F-527°F* Soldering Condition (Reflow Soldering):Less Than 5 Seconds With 500°F* Storage Conditions: Drying Preservation And Keep Away From Fire Or High Temperature. * Get other LED models? Please search "EDGELEC Diodes". EDGELEC 100pcs 5mm White Lights LED Diodes Flat Lens 29mm Long L if you're looking for the newest in electronic gear for your home, office, car or on-the-go, our store has it. Fanatics Men's NFL Fundamental Trucker Snapback Hat
Store Online For Discount + Fanatics Men's NFL Fundamental Trucker Snapback Hat Cheap Online Hot Sale

Store Online For Discount + Fanatics Men's NFL Fundamental Trucker Snapback Hat Cheap Online Hot Sale