The Trawl of the traffic sources (for the wiki) continues and has pulled up another gem, let’s say hello to Robotmonkeys.net, they also found my SmartLED. However, they’ve picked up on the issue mentioned in the make blog comments about the accuracy of the internal temperature sensor. I should try and set the record straight on this, the ATtiny25/45/85 chips have a +/- 10 degree Celsius difference between chips, not in the accuracy of an individual chip. Once you calibrate a chip to a known temperature (it’s best to do this at two temperature points – I put the SmartLED in the fridge to do this!) you can dial in the chip to make the readings accurate enough to be practical. It’s a pain but you would have to calibrate each chip individually if you were making a bunch of these.
But…. that’s not the interesting bit. It looks like Jonathan Koren (Robotmonkeys.net resident blogger) and I have a shared interest in Number Stations. In fact that’s perhaps unfair on Jonathan, as he’s got far more info on them than I’ve seen in while, I’ll have to catch up on what’s happening in the murky world of global short-wave espionage. I first read about number stations back in 2000 and thought they were the coolest thing ever. In fact it was the seed that started me on the route to classified satellite tracking (something else I like to think I’m ‘active’ in doing, but actually just talk about a lot). Kudos to Robotmonkeys.net for helping to keep number stations alive in the blogosphere! Yay!