Here is his lastest design using a compass,encoder and sensors

chis and dawn lastest project 2013

HI Rich

There is another way no one has talked about . Please checkout this link for sound direction finding. Very interesting reading.

sbolt.home.xs4all.nl/e-spider_sound.html#intro

Hope it helps.

Steve_c

Looks good STEVE only problem it would pickup other noises,it might be turned for another sound frequency

But thats the hard part,would need a pass filter design

Sound was mentioned however I missed it from the recap. Provided the frequency of the chirp is not one that can be heard by human (or I guess dog, cat or other animals which people may have as pets) it could be a good idea but if it is a frequency that can be heard then it may pose a few issues.

It's certainly a method that can be considered though.

HI Robotmaker

Look closer at the cicuit it only picks up the very short chirps from the tx

@ Rich

lol the dog would find the recharge nest no problem , Just put a doggy treat on it

@ Rich

Just another thought how about a ROVIO hack , The northstar like system on that is great. and you can get more beacons for it to increase its range into other rooms.

Steve_c

If I remember correctly the Rovio uses IR beacons, which is already in the list (and the one I personally think will be the best solution). I hope to find time soon to look in to it as it should be pretty much a universal method that can be used on almost all robot platforms.