Project: Experiment in small signal circuit design.

Thread Starter

hobbyist

Joined Aug 10, 2008
887
Here is a experimental circuit to sense current flowing through a wire by putting a electric cord near the top of a miniature power transformer that acts like a sensor and then turning on the appliance and that small signal gets amplified to the point where it can be rectified and then amplified in DC to turn on a LED, at the output.

No connections to the AC cord just magnetic flux cutting through the transformer windings and amplifying the signal to a usable output voltage..

This was fun to design...

current sensor 5.jpg
 

Attachments

Last edited by a moderator:

millwood

Joined Dec 31, 1969
0
would it have been simpler with an opamp?
 

Wendy

Joined Mar 24, 2008
21,840
Probably, but sometimes the fun is using a specific design approach, sorta like audiophiles building amps with tube circuits.
 
Top