Time to kick it into high gear!
Gather the material!
|Material||Quantity||Dimension/ size/weight (if applicable)||Alternative (if applicable)|
E.g: door/cabinet magnets, magnets extracted from toy/motors, etc
|Piece of white chart paper||1||17” x 12”||A4 paper x 2|
|Cardboard piece||1||5” x 5”||Piece of a milk carton or any other product|
|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.
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.
STEP 1: Take the chart paper and draw a grid of lines horizontal and vertical.
Doesn't matter how many lines you draw. Just make sure they are equidistant.
- 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.
- 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.
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.
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?
Make a list of what items would you need and start building it.