I have a project im working on. Basically want im looking for at this point would be a wireless switch. To where i can flip a toggle switch or button in my hand and have it like turn on an LED across the room. any ideas what that would be exactly?
There are wireless switches that work for a wall socket. Not quite what you want, though you could plug an LED night lite or mains operated LED lamp into that, for example. Very easy to do.
If you want it done in other ways the best bet is the garage door opener type of radio, or the car central locking type of thing. The transmitter is in the remote, and there is a receiver in the door opener, which you could buy separately probably. These usually need a 12V power supply for the receiver end, a regulated DC 12V plug pack would do. The result from the receiver when a button is pressed is to operate a relay. The contacts of this are wired to turn the LED on and off. The LED is connected to the 12V supply through a resistor, say 470 ohms.
The link below has some examples of this. You will have to trawl through it and find what you want, or find another similar site near where you are. It is not very practical to make radio devices yourself, so stick with off the shelf items. Some are quite cheap.
Across a room, you could make a device that worked on sound (clapping or whistling) or light from a bright LED or torch. The LED needs to be very bright, and focused to work more than a few inches. A laser pointer is another possibility. Perhaps it could have a code built in like 4 flashes within a given time. Also filters for sound frequency or light colour. You need more research into those kinds if you are interested, but I am sure you can find ideas on the internet and adapt them.
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