LEDs usually have between 1.5 and 2.2 volts at 10mA depending on the color. Silicon rectifier diodes are the ones that have .6 volts across them at 10mA.
| That's because of the sink arrangement. When the EMC2 output is High, | both sides of the opto-coupler LED are high, so there no current will go | through the LED. Generally you need around .6 Volts across the LED and | between 10 to 20 milliamps for normal operation. When the EMC output is | Low, the minus side of the LED is zero volts (sinking to ground), the | LED + side is around .6 Volts and the + side of the 270 Ohm current | limit resistor is 5 Volts. ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
