Optoelectronics

From OpenCircuits
Revision as of 01:48, 12 December 2007 by Mzoran (talk | contribs) (LEDs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

LEDs

LEDs are diodes that have a voltage drop designed to produce visible light. When using a LED in a cicuit it's important to use a current limiter such as a resistor. A typical LED is designed for aproximately 10mA. When using resistors measure the foreward voltage drop of the LED with a multimeter, subtract this from the supply voltage, then plug the difference into ohms law to calculate the required resistor value. Different color LEDs all have different voltage drops.