I’ve made my own Infrared Pen for use with a Wii controller; interactive white board a-hoy. Hopefully will use it somehow with Zimmy’s feedback project using Johnny Lee’s interactive white board software. See this post for some cool videos demonstrating it.
For anyone’s reference; I got the infrared LED from Maplin. The part is “High Power Infrared Emitting Diode” – it is rated at around 1.5 volts, so you can just directly connect it to a single AA battery. I then stuffed the whole lot inside a pen casing, with a push-to-make button on the end. Brilliant!
ps I do not sell these pens. If you want one, I suggest making it or if you can’t employ the services of an electrician! :o)