Electronic Component Talk

Bright Leds
White superbright Led Light as possible how to create?

I, a 12V AC transformer to Step Down to go through the rectifier brigde 240V AC Power Supply capacitors, and all I'm using. VLUU i like series in 1K Ohm Resistor can be connected at the 4 LED. How Possible to make this LED light?

If you LED data sheets if they reulwihan If you are certain of the Reviews may want to know about the LED brightness are looking up Others gave the value of 20mA while it would be reasonable to help Is the value of "Super Bright" at the current rating can be higher. You also want to use from the current Forward Voltage should be aware of. Probably typical for White Led Forward voltage of 3.4V will be 4 series, along with 12 or more, because the I told some of the parallel would be better, but it seems to be that the 13.6V In fact, you probably have more than 12V, the bridge is very lightly loaded Near the maximum voltage of the rectifier circuit (2) ≈ 17V for the 1.4V, less leg drop, And after rounding down, but my friends think as RMS, 12 * sqrt Filter Capacitor is charging, you can use quite reach the peak Voltage of approximately 15V is 15 times in - 13.6 = 1.4V, 1.4V / 20mA = 70Ω now very 1.4V Small difference, and if a slightly higher voltage or LED gaitda Transformers or capacitors, you will not get the maximum brightness May be small. So, in parallel, but put a pair of series Each series is also a pair of two series of his own need Since all of the LED, some few of them are not equal Difference between the current resistance, one of the LED series resistance and the number of paralleled Putting it does not work (while they last in this series Is currently defined) must be by the same However, if you In the example above that the most efficient will be a series of Circuit can be 1.4V * 20mA = 28mW lost, if you are using 15 to 3.4, all 4 LED's in parallel with, = 11.6V drop (580Ω) 11.6 * 4 * 20mA = 928mW not need to lose A lot of power but still ..

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