>> about 40-50 feet range using IR laser diode in remote controller > Peter, have you really test this ? > Vasile Certainly. Using a Sony remote controller if I am not wrong. 40 feet is less than 15 meters. Of course you knew that ;-) You better have a steady hand and check the laser spot on a wall using a CCTV camera. Misalignments of a few (one, two) degrees are significant at 40 feet. The target is only 2 inches across fyi. You can compute the amount of coffee you can consume in your previous life (before using this) from the required hand-steadiness. . Notice that the way in which the remote operates the diode means certain death to it (no feedback, full current drive = mirror blown to bits after a few milliseconds). This does not seem to bother the remote link. A proper modulator would limit the current somehow. Although pulsed lasers can work at higher levels than the 1.5A pulses in this remote. Peter -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.