Electronman
New Member
Hello guys,
Whats this:
Ultrasonic Surveillance Bug
Is that kind of hidden microphones which does work with ultrasound instead of RF??
How does it work really? Is it based upon kind of modulation? If so, which kind?
It seems to be a nice circuit to work with to learn several priciples..
Thanks
Whats this:
Ultrasonic Surveillance Bug
Is that kind of hidden microphones which does work with ultrasound instead of RF??
How does it work really? Is it based upon kind of modulation? If so, which kind?
It seems to be a nice circuit to work with to learn several priciples..
Thanks