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Here is how to make a 2-channel RF transmitter and receiver that works on the 418 MHz frequency. Unlike IR remotes, this one can work through walls and at a greater distance too. It's perfect for closing the garage door or anything else that you are too lazy to get up and do. - Link
2-channel RF Transmitter
Posted by Marc de Vinck |
Feb 14, 2008 02:30 AM
DIY Projects, Electronics |
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How long does it take to send a signal and will multiple transmitters interfere with each other?
I'm wondering if this can by used with several transmitters sending different codes to make a wireless trivia gameshow type buzzer.
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I was all over the web looking for something like this last Halloween when I wanted to add a stand down command to my 10 foot tall animatronic scare crow?
Thanks!
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Austringer, I'm pretty sure you can buy something similar to this as is for a lot less than it would cost to make this.
The beauty of this build is that you can customize it (for example have one relay turn off after 10 minutes.)
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hi,we would like to increase the frequency to 900 mhz i.e. to gsm frequency....could u help us??
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