Please help a numbskull

[endean0]

Can you please help with the following.

Building a voice activated switch to use in conjunction with a portable voice recorder. The whole unit should be no larger than a mobile phone and should have some degree of sensitivity control and cut off timing control. The whole unit needs to battery powered and will remain so for up to four weeks.
I wish to build the unit myself although a complete novice, so please be gentle.

Thanks

Endean

 

[Klaus]

Try googling for "VOX". These switches are often used by amateur radio operators.
I can see some problem if you mean tape recording by portable voice recording, it takes time for the mechanism to start moving so you might lose the first second or so of the sound.
You have to choose a battery suitable for this application if there is no way of maintaining its charge (solar cells, etc.)
Klaus

 

[hotwaterwizard]

Here is a Post I dreplyed to on another board. It may help you.

https://www.electronics-lab.com/forum/index.php?board=22;action=display;threadid=1467

 

[endean0]

Thanks

Thanks Guys most helpfull. I'll be back if I get stuck.