Camera Light

[Tom Line]

Originally Posted by Alan Anderson

350 milliamps is probably a lot more than you should be using. There's no need for a "blindingly bright" light. A simple four-LED flashlight module running at only 10 mA gives us enough response from the retroreflective target to almost saturate the camera.

Alan - you're probably the right person to ask. We were also considering using a flashlight of some sort, however, you can't get the actual resistance of LED's with a multimeter, so I don't know how to go about voltage dividing them with a resistor so they get the proper voltage from a spike.

Is it possible to run them off a digital output pin? What's the allowable amperage out on one of the pins? I can't find that in the digital sidecar documentation.