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Radio Waves

Ranjeet Jandu

Sep 6, 2016
3
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Sep 6, 2016
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Hi, I am new to all this and have a project in mind. I am looking for a device A, that just sends out radio waves and a device B that just receives them. This should only happen if the two devices are 5m within reach of each other. Device B, can make a sound or just light up or both!
Can someone suggest anything, help or point me in the right direction?
Thanks.
 

Externet

Aug 24, 2009
891
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Aug 24, 2009
Messages
891
Then you first need to focus on designing a device-circuitry that measures the distance between transmitter and receiver being 5m. Can be complex or as simple as a 5m string between them activating a tension switch.
When that gets accomplished, enabling the radio link.
There is a reverse gadget in the market, but not very precise for distance :

----> http://www.mypreciouskid.com/child-locator.html

----> http://www.hippih.com/hipkey

----> https://duckduckgo.com/?q=luggage+distance+alarm&t=canonical&ia=images
 

davenn

Moderator
Sep 5, 2009
14,254
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. This should only happen if the two devices are 5m within reach of each other.

radio waves don't just stop at a certain distance
they go on and on forever just getting weaker and weaker
 

Amar Dhore

Dec 2, 2015
129
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Dec 2, 2015
Messages
129
your concept is like a bluetooth beacon technology. google bluetooth beacon
 

Ranjeet Jandu

Sep 6, 2016
3
Joined
Sep 6, 2016
Messages
3
Then you first need to focus on designing a device-circuitry that measures the distance between transmitter and receiver being 5m. Can be complex or as simple as a 5m string between them activating a tension switch.
When that gets accomplished, enabling the radio link.
There is a reverse gadget in the market, but not very precise for distance :

----> http://www.mypreciouskid.com/child-locator.html

----> http://www.hippih.com/hipkey

----> https://duckduckgo.com/?q=luggage+distance+alarm&t=canonical&ia=images
Thanks
 

CDRIVE

Hauling 10' pipe on a Trek Shift3
May 8, 2012
4,960
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4,960
In order for you to receive relevant answers it's always best to divulge 'completely' what you're desirous of doing.

Chris
 
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