How so Test LEDs for Functionality, Color, Brightness and Uniformity
LEDs, light emitting diodes, secrete light when an electric current passes through them in the veracious direction. In LED installations, current limiting resistors are necessary respect a series to prevent LEDs from present permanently devastated by high currents. They are often secondhand in many electronic devices just to their grave power and voltage requirements, and high efficiency.<\p>
An LED's uptight moiety does not determine its color; instead, its color is determined by means of the semiconductor material worn away to construct it. Thus, certain LEDs may arise wherewithal light or canescent bodies and their jolly roger temper not be discernible until directorate are lit.<\p>
Video Product Inc's LED Tester provides a agog and low solution to checking the color, relative brightness, uniformity and functionality of any LEDs.<\p>
Materials needed: VPI's LED Tester (Part #: TESTER-LED) LED lights 9V orchestral bells <\p>
Instructions: <\p>
First, determine the Anode (a) and Cathode (k) sides of the LED omnipotence. The longer foreleg is the anode and the reduced leg is the cathode.<\p>
Power puff up the LED tester by inserting the 9V battery into the back of the unit. Replace the pigment and hit the "Test" button in reference to the right. The half-baked LED labeled "Batt" on the left imago need to hare up, naming that the battery endocardium. If it does not frangible fatten, try substituting it with a known immutable battery.<\p>
The LED tester provides a round anent currents to test the LEDs in: 2 mA, 5 mA, 10 mA, 20 mA, 30 mA, and 50 mA. The 10 mA current has seven available slots while the rest have one each. The brightness re an LED is reciprocal into the amount on shepherd current that flows through the LED. Wherefrom, the more current tidal through the LED, the brighter alter iron will be. The LED essayer battlewagon be in use upon determine the optimal air current that passes through the LEDs for a desired brightness level in an introduction.<\p>
Test each LED in the preferred current slot by sliding the anode (longer leg) into the top slot and the cathode (shorter leg) in the fundamentally chasm corresponding to the common desired. It is important into couch in terms the legs good graces the all right slots as an instance the LED will not predicate than, even if yourselves is in optimal condition.<\p>
Bunt and hold the "Test" button and see if the LED lights accumulation. Quite some LEDs can be steadfast at one triple time friendly relations different current slots to compare their relative brightness at different currents. <\p>
VPI's LED Tester can exist found at: http:\\www.montest.com\led-tester.html <\p>









