White Superbright
 |
 White Waterproof 3528 600LED 5M 120LED M Light Strip  US $12.50
|
 12 VOLT 200 WATT HEATER FAN DEFROSTER US $24.95
|
 5M RGB LED Stripe Led ribbon Light SMD 5050 44 Key IP65 waterproof US $9.99
|
 10p PLCC 6 5050 SMD 3 CHIP WARM WHITE LED LIGHT 9000mcd US $1.00
|
 50 SMD SMT 0603 super Bright warm White LED Lamp Light US $1.25
|
 White 36 SMD LED Interior Dome Map Light Bulb T10 194 US $.29
|
|
|
40 Super Bright Finger Flashlights - LED Finger Lamps - Rave Finger Lights $4.45 You will find hundreds of uses for these lights. Uses 3 AG10 batteries included. Super Bright, Long Life. Hook & Loop Straps to fit Fingers, Pens, pencils, Tools, etc. Push button ON/OFF.... |
|
|
SE Wireless Motion Sensor Light - 10 Super-Bright LED $8.32 Instantly add motion-activated light for security and safety - indoors or out*Infrared technology senses both movement and heat for fewer false activations*Compact (3" x 3") and lightweight (4.3 oz) lets you install almost anywhere; easy-mounting slot *10 super-bright LED cast pure white light, last for 100,000 hours, sip battery power*Wire-free installation, operates for months on 3 AA batteries ... |
|
|
Neiko Super-Bright 9 LED Heavy-Duty Compact Aluminum Flashlight - Gunmetal Silver $0.99 This amazing compact flashlight is like a spotlight you can carry in your pocket or purse! NINE light-emitting-diode (LED) bulbs produce a flood of pure, white brilliance but because LED bulbs produce very little heat, three inexpensive AAA batteries will last for over 20 hours continuous. Positive-action switch (click on/click off) won't go on accidently in car, toolbox or pocket. Heavy-weight ... |
|
|
SE Home Camping Car Travel Emergency -12 LED Push On Light $0.99 The 12 LED Push On Light is water resistant and lasts approximatelyl 30 hours before the batteries need to be changed. Requires 3 AAA batteries. This light is great for camping, in closets, garages, storage shedss and more.... |
|
|
PKG(5) 8mm Super-Bright White LEDs 3.5 to 4.5VDC, 8,000 to 10,000mcd $2.50 Just the 8mm super-bright white LEDs you need, 3.5 to 4.5VDC, 8,000 to 10,000mcd, (5) to a pack! Made for tinkerers (electronics, alarm signals, do-it-yourself flashlights) and hobbyists (model cars, railroads, dollhouses, Christmas villages). And perfect for robotics!... |
|
|
PKG(5) 5mm Super-Bright White LEDs 3.5 to 4.5VDC, 8,000 to 10,000mcd $1.95 Just the 5mm super-bright white LEDs you need, 3.5 to 4.5VDC, 8,000 to 10,000mcd, (5) to a pack! Made for tinkerers (electronics, alarm signals, do-it-yourself flashlights) and hobbyists (model cars, railroads, dollhouses, Christmas villages). And perfect for robotics!... |
|
|
Epson PowerLite Home Cinema 3010, Full HD 1080p, 2D and 3D Home Theater Projector with Integrated Speakers (V11H421020) $1,495.00 Epson PowerLite 3010 3D Ready LCD Projector - 1080p - HDTV - 16:9 V11H421020 Projectors... |
|
|
Samsung Series 5 3G 12.1-Inch Chromebook (Arctic White) $499.99 Innovatively designed to go as long as you can, the Samsung Chromebook Series 5 lets you spend the whole day surfing, streaming, and working on the web on just one charge. With less than 10-second booting and an amazing 8.5 hours of battery life, the light and sleek Chromebook Series 5 gives you the ultimate web experience that you won't find on any other laptop. Search for the best web experien... |
|
|
Samsung Series 5 3G 12.1-Inch Chromebook (Titan Silver) $499.99 Innovatively designed to go as long as you can, the Samsung Chromebook Series 5 lets you spend the whole day surfing, streaming, and working on the web on just one charge. With less than 10-second booting and an amazing 8.5 hours of battery life, the light and sleek Chromebook Series 5 gives you the ultimate web experience that you won't find on any other laptop. Search for the best web experien... |
|
|
Planet Bike 3040 Superflash Tail Light and Blaze Headlight Light Set $49.99 Notify drivers and other cyclists of your presence from up to 1 mile away with the Planet Bike Superflash taillight and Blaze headlight set. Equipped with a half-watt Blaze LED light for the front and a combo LED set for the back, the set provides wide visibility in both flashing and steady modes, depending on your preference. In addition, the rear Superflash light--which includes three half-watt ... |
How can White Super Bright LED as bright as possible?
I use the power supply 240 V AC, with a step transformer 12 V AC through a rectifier bridge and through a capacitor. I connect 4 LEDs in series with a resistance of 1K ohms. How these indicators LEDs as bright as possible?
If you have a datasheet for the LED would be useful, while the value given another 20th is a reasonable value if you are a light maximum you may want to know what your specific LEDs are provided for, if they are "Super Bright" the current valuation could be higher. You also need to know the DC voltage to use. Perhaps a typical forward voltage of a white LED can be 3.4V, with 4 in the series which has 13.6 V, which represents more than 12 years, which could explain why some have said would better parallel, but in reality you probably need more than 12V, a bridge rectifier circuit is very lightly loaded voltage charging capacitor filter near the top, not RMS, 12 * sqrt (2) ≈ 17V to 1.4V unless the bridge collapse, and rounding down, since it is not quite reach the top you can call the 15V voltage is available at about 15 to 13.6 = 1.4V, 1.4V / 20mA = 70Ω Now 1.4V difference is very small, and especially if the LED were slightly higher voltage or transformer or capacitor is small you may not get maximum brightness. So I could put two pairs of series in parallel, but each pair of series resistance will have its own series, bringing a number of LEDs in parallel, in series with a resistor is not working well because there is a slight variation on the current LED will not equal at all (although in the current series should be the same, by definition), but if you can use a series circuit is the most effective in the above example, 1.4V * 20mA = 28 MW lost, if you used the 4 LEDs in parallel, with a 15 - 3.4 = 11.6 V drop requirements (580Ω) 11.6 * 4 * 20mA = 928mW loss, not much power but ..