Kits Tins Extra parts
(0 Items in Cart)

Back to products listing page

Currently out of stock on all Iron Detector (+ Tin) products. We will be sourcing more soon.

Generic placeholder image

The Iron (Fe) Detector

This is a very useful, easy to build, small ferrous metal indicator circuit utilising the hall effect. It shows how we can use the Hall effect to distinguish metals with iron content from non ferrous metals.

Great to check if those silver coins have any iron content in them (Fake coins). This works well for coins, since a tiny amount of iron gives a very weak magnetic field and so can not often be detected unless you have a very large strong magnet. With this circuit you can detect small magnetic fields. The whole thing can be installed into a tiny aluminium tin.

All kits that you buy will all come with two detailed videos, one will describe the theory the second video will show how to drill and adapt the tin so your board fits within it. (both videos are displayed on this page below)


Kit parts are as follows:
  • 1 of PCB board
  • 1 of 100k Ohms Trim Pot (VR1)
  • 2 of 470 Ohms Resitors (R2,R3)
  • 1 of 270 Ohms Resitor (R4)
  • 2 of 3mm LEDs (Red and Green)
  • 1 of Small Neodymium magnet
  • 1 of LM741 OpAmp
  • 1 of Battery Clip
  • The tin (95mm x 60mm x 21mm)
  • Assembly instructions

The theory behind the circuit

The theory video is not required to get your circuit running. Those who are not interested in how the circuit works can just use the assembly instructions and refer to the second tin installation video for tips and an example on how to install the circuit within a typical enclosure. The theory is just an extra bonus video for those who like to know how their kits work.

NOTE: Video below is in HD quality so please view it in full size for best effect.


Tin Installation Video

NOTE: Video below is in HD quality so please view it in full size for best effect.

 

All kits that you buy will all come with a tin as an enclosure. (96mm x 60mm x 21mm) This short video goes through some suggestions on how to install your finished circuit into a typical enclosure. Often the tins used in the installation videos is a smaller tin for demonstration purposes. But you will always receive the larger tin version.