Every year, Shelly the tortoise gets lost or manages to escape the garden. It can take days to find her. I would like to build a locating device so that I can track her down. The basic requirements are:
a) that the 'transmitter (transponder?) on the tortoise is as small as possible.
b) that it can be made by an electronics numpty. I have basic soldering skills, and can eventually work out a circuit diagram.
Can anyone point me in the right direction?
TIA Floatything (an escapee from uk.rec.sailing)