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If the wave length is unknown the LED can be connected to an adjustable voltage source via a large resistor and the voltage can be gradually increased until a small current flows through the LED (for example 1mA will be ok for most LEDs without destroying them). Then the voltage of the LED can be measured (in parallel to the LED). | If the wave length is unknown the LED can be connected to an adjustable voltage source via a large resistor and the voltage can be gradually increased until a small current flows through the LED (for example 1mA will be ok for most LEDs without destroying them). Then the voltage of the LED can be measured (in parallel to the LED). | ||
== Links == | |||
* LED Resistor calculator [http://www.elektronik-kompendium.de/sites/bau/1109111.htm here] or [http://www.led-store.ch/vorwiderstand-rechner.php there] | |||
* [http://led.linear1.org/led.wiz LED Array Wizard] | |||
[[Category:Electronics]] | [[Category:Electronics]] | ||
[[Category:Martin Schied]] | [[Category:Martin Schied]] | ||