Time to kick it into high gear!
Gather the material!
![](http://moodle.qriosity.tech/pluginfile.php/3621/mod_page/content/5/image.png)
Material | Quantity | Dimension/ size/weight (if applicable) | Alternative (if applicable) |
Powerful Magnets E.g: door/cabinet magnets, magnets extracted from toy/motors, etc | 2 | Any size | - |
Piece of white chart paper | 1 | 17” x 12” | A4 paper x 2 |
Newspaper | 1 | Standard size | - |
Cardboard piece | 1 | 5” x 5” | Piece of a milk carton or any other product |
Clamping clip | 4 | 15mm-32mm | - |
Cotton thread | 1 | - | - |
Small cut pieces of steel wool - cut it out of scotch Brite dishwasher (steel spiral) - use a scissor to cut the steel spiral | 1 | Several tiny pieces (refer to the image below) | Scotch Brite steel spiral |
Strong magnets | 2 | Button magnet/U magnet | |
Optional: Single Hole Puncher |
How to get metal shards?
- Cut small pieces of steel wool and pile it up.
- You can also use scotchbrite - stainless steel spiral.
![](http://qriosity.tech/uploads/Anomoz_Q1JV9VQSM1S2.0.jpg)
Let's get started!
- First, we need to mark the location(s) where our device detects the magnetic field so that it can be saved into our database.
- We use a coordinate system for this purpose. That makes it easier and systematic.
![](http://qriosity.tech/uploads/Anomoz_FRLJBIC1D6900.jpg)
STEP 1: Take the chart paper and draw a grid of lines horizontal and vertical.
![](http://moodle.qriosity.tech/pluginfile.php/3621/mod_page/content/5/image%20%281%29.png)
Doesn't matter how many lines you draw. Just make sure they are equidistant.
![](http://moodle.qriosity.tech/pluginfile.php/3621/mod_page/content/5/image%20%282%29.png)
Practice!
- Label the rows with numbers starting from 'X'.
- Label the columns starting from the alphabet 'A'. (The first column is set to 'X' by default).
Now put a magnet on any box on the chart paper and try to name it.
Block name = Alphabet + Number.
STEP 2:
- At two different points on the second paper, stick two magnets. Make sure they don't move.
- Cover it up with the chart paper and clamp paper clips on each side so that it doesn't move.
![](http://moodle.qriosity.tech/pluginfile.php/3621/mod_page/content/5/image%20%284%29.png)
Making the Detector
STEP 3: Think of a holder that enables you to see any changes in the items it holds.
Cut a piece of thread of length 10 inches, and stick it at the back of the cardboard.
![](http://moodle.qriosity.tech/pluginfile.php/3621/mod_page/content/5/image%20%287%29.png)
Step 4: Join the free ends of the threads together.
Step 6: Put the grid paper on the top of the blank paper (with magnets) and clip them from the two sides.
Let's give it a try!
See how the magnetic-detector works.
Hint: Go slow.
How would you make a bigger magnet-detector to detect the magnetic field in a room?
![](http://qriosity.tech/uploads/Anomoz_I9E4NQ4YS7magnet.gif)
Make a list of what items would you need and start building it.
Last modified: Tuesday, 30 March 2021, 12:04 PM