Water Compass
Water Compass
3D
Published 2019-10-23T17:28:16+00:00
The idea behind this is to teach young kids the idea of creating your own compass using only water and some simple materials. This can be then further used to help explain the idea of magnetic poles and rotating electrons, which causes the needle to always point north and south. https://en.wikipedia.org/wiki/Earth%27s_magnetic_field
The little hole on the top is for a 10 mm diameter by 2 mm depth magnetic, which can purchased from Amazon or other retailers. https://www.amazon.com/Cutequeen-Ceramic-Industrial-Ferrite-Refrigerator/dp/B06XXTQQ35/ref=sr_1_4?keywords=magnets&qid=1571696207&sr=8-4&th=1
This product was created using the open source 3D CAD software FreeCAD.
At a price of $20 per kilogram, this compass only costs $0.56 to print, 100 magnets to fit in the designed hole would be $0.08 per compass, and a sewing needle is less than $1. Making the total cost of this to be less than $1.75, where a traditional single compass on amazon is $6.39.
https://www.amazon.com/Orienteering-Compass-Waterproof-Navigation-Backpacking/dp/B07FXH2CPT/ref=sxin_3_ac_d_rm?ac_md=2-2-Y29tcGFzcyBmb3Iga2lkcw%3D%3D-ac_d_rm&keywords=compass&pd_rd_i=B07FXH2CPT&pd_rd_r=04cdcf02-80db-4f73-b26a-dc4442c4776c&pd_rd_w=dZNgx&pd_rd_wg=7oBOt&pf_rd_p=983984df-2ad2-4c97-ba7f-4c5a90291c2b&pf_rd_r=0385FFX61MKSJ854TY68&psc=1&qid=1571850347
Saving $4.50 per compass for the demenstration or learning experience.
200 Celcius
Printed with Brim
10% Infill
| Date published | 23/10/2019 |
| Time to do | 3 - 19 minutes |
| Material Quantity | 28 grams |
| Dimensions | 110 mm diameter by 16.7 mm height |
| Support Free | YES |
fun project for 4 year old