Jump to content
Electronics-Lab.com Community

(EMF) Electromagnetic field detector


Guest nanop

Recommended Posts

Hi!
I'm planning to build the following circuit and
I have some questions about the following project:
http://www.electronics-lab.com/projects/science/006/index.html

Since the LF351 is no longer available, can I use the TL07x series, TL071, TL082, or possibly a LM741, or LM386?

What kind of meter and range do I use?
Or possibly skip this and just use the earphone?

The last one is, what are the pin connections?
THe schematic doesn't show the pin #'s.

thanks very much!!

Link to comment
Share on other sites



Since the LF351 is no longer available, can I use the TL07x series, TL071, TL082, or possibly a LM741, or LM386?

It is such a simple circuit that it will work with any opamp. An LM386 is a power amplifier with a pre-determined gain, not an opamp, and the circuit won't have enough gain with it.

What kind of meter and range do I use?

The project doesn't say anything about the meter. It is driven by the 10k resistor with a few volts, so a 200uA meter will work.

Or possibly skip this and just use the earphone?

What do you expect to hear? Lots of mains hum.

The last one is, what are the pin connections?
THe schematic doesn't show the pin #'s.

Look on the datasheet for the opamp.
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
  • Create New...