Aaron's Homepage Forum
Aaron's Homepage Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
 All Forums
 Electronics
 Other Circuits
 555 timer detection

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Screensize:
UserName:
Password:
Format Mode:
Format: BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkInsert EmailInsert Image Insert CodeInsert QuoteInsert List
   
Message:

* HTML is OFF
* Forum Code is ON
Smilies
Smile [:)] Big Smile [:D] Cool [8D] Blush [:I]
Tongue [:P] Evil [):] Wink [;)] Clown [:o)]
Black Eye [B)] Eight Ball [8] Frown [:(] Shy [8)]
Shocked [:0] Angry [:(!] Dead [xx(] Sleepy [|)]
Kisses [:X] Approve [^] Disapprove [V] Question [?]

   Insert an Image File (GIF, JPG, JPEG, BMP, ZIP, PNG)
   

T O P I C    R E V I E W
Sicode Posted - May 25 2011 : 6:03:45 PM
Pebe, this is similar to what i was searching for.I will try and verify how it goes. any possibility? from here:

http://1.bp.blogspot.com/_RpOfkmvmOVM/TNV5cgurXEI/AAAAAAAAApU/0T64QuTaV-c/s1600/cellphone+call+detector+sch.png

Download Attachment: cellphone_call_detector_sch.jpg
47.59 KB
2   L A T E S T    R E P L I E S    (Newest First)
Sicode Posted - May 26 2011 : 01:05:17 AM
Audioguru, guru indeed. Tried the circuit overnight. Senses everything in the damned air, and nearly picks my voice. loooooool
audioguru Posted - May 25 2011 : 9:06:59 PM
The transistor is a widebnand amplifier so it will pickup mains hum, AM radio stations, FM radio stations, TV stations, taxi cab transmitters, police transmitters and hundreds of other transmitters including nearby cell phones that are ringing.

Aaron's Homepage Forum © 1995-2020 AARONCAKE.NET Go To Top Of Page
This page was generated in 0.03 seconds. Snitz Forums 2000