I need some type of radio communication between 2 mobile robotic devices, they need to be aware of each other when they are too close, 1-2 metres.
They don't need to communicate (data) with each other, just be aware of each other. A microcontroller will control the logic.
The big problem is that I haven't got a scope, so it's a bit difficult to design my own thing. There are lots of circuits available on the net, I've built some of them and they haven't worked. I can't afford to go through a massive learning curve because I've got two or three projects on the go.
What I'm asking for is some advice, what should I be looking at, frequency, modulation etc., and if there's a tried and tested circuit you could recommend.
*power 9v rechargeable power pack
*aerial if vertical 6" max
They don't need to communicate (data) with each other, just be aware of each other. A microcontroller will control the logic.
The big problem is that I haven't got a scope, so it's a bit difficult to design my own thing. There are lots of circuits available on the net, I've built some of them and they haven't worked. I can't afford to go through a massive learning curve because I've got two or three projects on the go.
What I'm asking for is some advice, what should I be looking at, frequency, modulation etc., and if there's a tried and tested circuit you could recommend.
*power 9v rechargeable power pack
*aerial if vertical 6" max