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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
With up to date firmware, I've had about 1.5 meters. However, Puck.IR output an IR remote control style signal (which is pulsed at 40kHz). You would probably have more success using one of these types of detectors for it: http://www.espruino.com/IRReceiver
It's possible the TX/RX pair you have are even using a different wavelength of light as well.
Aha, thanks! I was looking on the reference page. I'll get that fixed.
It's much less exciting I'm afraid. It's the fault of the webpage (not putting http on the front of the link). That's fixed now, I just have to upload the changed page.