As lazy as always, I want some ideas about a hobby project I have in mind right now. Since I'm a noob with this, some of the RF guys here could give me some hints about the simple thing I want to do.
Mainly, what I want to achieve is to syncrhonize few different ATmega64's by RF means with another uC (probably AT91SAM7S64 or SAM7X256). There would be a single Txmitter (the ARM or whatever), and few receivers.
The M64's are currently soldered to a PCB, and have the IRQ0 and IRQ1 pins free, so I would use this as the trigger to Sync the whole bunch, attaching a simple receiver to that pin.
So one possible idea is to generat a few MHz signal with the xmitter, amplify it, apply that signal to an antenna, and use some NE567 or whatever to detect the signal, triggering the interrupt at the receivers
The intended precission would be arround tens of us, if possible, below 0.1 ms. Range <100m in open space, line of sight. Hobbyst purposes, no FCC, or any other regulation.
But I don't know if this would work, if there are better solutions, or other means to achieve the same. If it works, I don't have any idea about the amplifier to be used, neither the antenna layout (probably a simple loop would do for such low frequencies), the receiver or any RF stuff.
Can some point me in the rigth direction?
If it works, I probably will post results and some related stuff, but don't expect anything soon.