What is the cheapest way to send a very basic on/off signal over radio? Basically like wireless doorbell style, just some sort of high signal when a remote button is pushed. Range isn't a big deal but further is better obviously. I'm really only worried about within a room.
So far the only things I can think of is either tearing apart a wireless doorbell($10) or using a couple of transceivers(or transmitter and receiver) intended for serial communication which is overkill but actually cheaper than the doorbell(like $3 per transceiver).
Can I get cheaper than this? I'd like to stay simple but beggars can't be choosers. I wouldn't mind building the circuit myself.
Just looking for any info on the matter to get a better idea of my options. Thanks.
So far the only things I can think of is either tearing apart a wireless doorbell($10) or using a couple of transceivers(or transmitter and receiver) intended for serial communication which is overkill but actually cheaper than the doorbell(like $3 per transceiver).
Can I get cheaper than this? I'd like to stay simple but beggars can't be choosers. I wouldn't mind building the circuit myself.
Just looking for any info on the matter to get a better idea of my options. Thanks.