Hi,

Your project sounds interesting.

You should be able to replace the normal LEDs with IR LEDs if the specifications of the LEDs are similar. Otherwise, you may need to design a simple circuit to get the correct forward voltage you need.

You can use the Wiimote to trace the location where the IR lights up and record this on the software. Then, you can project this to your wall in real-time. First of all, you may need to calibrate the Wiimote and the Wall (like a screen).

If the wall is flat and the Wiimote is sufficient far away from the wall, the project should be feasible.

All the best in your engineering project!

Regards,
Boon Jin

The answer to that question would depend on what kind of results you are trying to get. Basically, the White screen mode of smooth board would be enough to mark a few points. If your black marker were active for example, and assuming that you can get your stud finder to work with IR LEDs as you propose, then as soon as the stud finder turns on the LED then a black line (or at least a dot) would appear on the wall via the projector. If your want something more sophisticated, for example, you want the software to draw a line from ceiling to floor as soon the IR LED goes on then you will have to do some programming, at least macro programming of your own. Um, maybe "processing" or Corel Photo Paint or Gimp, but you won't find a function like this just "built in". If you would like to be able to "SAVE" the pattern of studs an conduits that you have found WELL then you are in real trouble. You would have to model the room somehow to make sure the you can re-calibrate the observed information with the real room. Maybe all that it would take is a black box in the graphic, and you know that that black box should be place on the edge of the door for example. Even at that you would have problems if the projector is not exactly the same distance from the wall as when the first measurements were taken, truly an interesting project. I hope this has helped more then it has confused and dis-heartened.

By the way, you don't necessary have to crack open your stud finder. Just hold (or duck tape) an IR pen right on top of the stud finder, then whenever the stud finder goes on, turn on the IR pen. Whenever the stud finder LED goes off, turn off the IR pen.