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=== Knowing The LED's color === | === Knowing The LED's color === | ||
If the wave length is known the minimum voltage to create light can be calculated [http://www.pveducation.org/pvcdrom/properties-of-sunlight/energy-of-photon here] or in this [http://www.oksolar.com/led/led_color_chart.htm LED color chart]) | If the wave length is known the minimum voltage to create light can be calculated [http://www.pveducation.org/pvcdrom/properties-of-sunlight/energy-of-photon here] or in this [http://www.oksolar.com/led/led_color_chart.htm LED color chart]) - this method is not very reliable due to several reasons. Better measure it using one of the below methods. | ||
=== Testing with a Resistor === | === Testing with a Resistor === | ||