Forward voltage: 3.6V
I am drawing too much power then the 5v from the arduino?
I'm new to all this and I have two LEDs (super bright white) from Radio Shack connected in series. When I connect the circuit to the Arduino the lights turn on but very dim. Is it because I am drawing too much power then the 5v from the arduino? Basically my students want to create headlights for their robot. I figured two LEDs in series would do the trick and not take up an extra pin on the board. Is there a better way to do this?The specs for the LED are below Reverse voltage: 5V Continuous forward current: 30mA Peak forward current: 100mA Power dissipation: 120mW Operating temperature range: -25°C to 85°C Storage temperature range: -25°C to 100°C Lead temperature: 260°C Forward voltage: 3.6V Reverse current: 60 ?A Luminous intensity: 16,000 mcd Peak emission wave length: CIE coordinates typically X: 0.3, Y: 0.31 Viewing angle: 22°
Do they make a lower voltage LED so two can be hooked up in series?
Yes, but not in white color. Red Leds may be as low as 1V or so.What most people will probably do at this point is run the Leds [in series] off the main battery, and use an NPN or n-channel MOSFET inverter to drive the Leds.For only 30 mA, almost any NPN will do, like 2N2222. Choose the collector R valueto push the correct Led current and make certain to saturate the transistor.http://www.kpsec.freeuk.com/trancirc.htm
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