Emf detector!~help

  • Thread starter alnywk
  • Start date
  • #1
14
0
http://www.electronics-lab.com/projects/science/006/emmeter.gif"
i want to ask
1. is it used to detect emf ?
is it an emf meter
2. how to detect
3. how does am-plifer work ?
transistor used for??
diode use for?
4 if i change other value of capacitor?
inductor?
resistor?
what will the effects of each??
5. what is the error will be?
is there any limitation???
thankss
 
Last edited by a moderator:

Answers and Replies

  • #2
berkeman
Mentor
59,689
9,847
Well, if the 1mH coil at the left is an open slug, then this circuit will respond to changing magnetic fields. The current-to-voltage converter stage (the opamp) has a single pole 3dB lowpass at around 1kHz, so this circuit looks to be mainly for sensing powerline frequency B fields. Hey, maybe you should offer to visit Buisness Man and help him with his power problems!

https://www.physicsforums.com/showthread.php?t=142685
 

Related Threads on Emf detector!~help

  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
2
Views
2K
Replies
5
Views
3K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
7
Views
5K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
10
Views
2K
  • Last Post
Replies
6
Views
876
Top