381Views4Replies

Author Options:

how to make only 1 channel very cheap walky-talky.? Answered

Picture of


Tags:3MHZ

4 Replies

user
lemonie (author)2011-03-06


What's the picture about?

L

Select as Best AnswerUndo Best Answer

user
kevinhannan (author)lemonie2011-03-06

well, she'd be the person who I'd share my walkie talkie with! ;-)

Select as Best AnswerUndo Best Answer

user
rickharris (author)2011-03-06

2 Plastic cups, (used to be 2 tin cans), make a small hole in the bottom and join them with a long length of string. Hole the cup to your ear whilst your friend pulls the string tight (not too tight) and speaks in the other end - You can hear over long distances.

Other wise, you could use a simple amplifier and microphone and ear phones to make a simple telephone system, if you choose your ear phone and microphone carefully you may not need the amplifier.

https://www.instructables.com/answers/HOW-TO-BUILD-A-SIMPLE-WALKIE-TALKIE-FOR-SHORT-DIST/

http://www.freewebs.com/acwebpage/Presentations/Walkie%20Talkie%20Lecture.pdf

To be honest I can't find what you might call a very cheap option other then the above. Building Radio Frequency devices is actually very difficult. Going the mores code option with a crystal receiver and a spark gap transmitter is perhaps the least complex option.

Select as Best AnswerUndo Best Answer