Firstly Hi to all as Im a newby,
I am wanting to create a basic pager system so I can be called from upto 300mtrs from 5 different points and use 1 receiver that beeps when activaed. I would like to use 9v pp9 as the power source as this is what is powering the device I want to page or warn me. I have been scanning the internet for a couple of days and I have learnt loads but I need some pointers on the finer details of construction of such a system. I have found some TR & RC which have 4 pins and are 1,- 2,+ 3,ant 4,data this is the same for both.
What do I use for data in and how can I get the data out to operate a beeper?
I have thought about using sound ativated TR which will transmit sound and an audio out RC but I just need a simple beeping.
Any links pointers help info or other would help me so much
Thanks for reading