Magnetic Polarity Tester(Magnetic Sniffer Probe)

Working with magnets and want a fast way to tell their NORTHs from their SOUTHs? So I decided to build an electronic one that meets that function.

Advantages:

This circuit is simple and practical, low power consumption. Fewer parts,and the line is simple and easy to understand.

Schematic

Custom PCB x 1
44E Hall Effect Sensor x 2
Reed switch MKA-10110 x 1
100Ohms 0805 SMD resistance x 2
100nF (104) 0805 SMD Capacitor x 1
0805 SMD LED Red x 1 / Blue x 1
3 AAA battery holder x 1

I use EasyEDA to design PCB and upload the design to JLCPCB.com to manufacture PCB.

JLCPCB make high quality prototyping PCBs for people all over the world. They have over 300,000 worldwide customers with over 8000 orders per day! They have over 10 years of manufacturing experience and are super reliable. Try it for your self and get 10 PCBs for just $2 at JLCPCB, New registered users US$54 offer , Order here

You can use my gerber files to ordel your own PCBs, and build this DIY Project.

Just a quick example how to order PCB from JLCPCB.com:

1)press "QUOTE NOW"

2)press "Add your gerber files"

3)upload zip or rar

4)all properties could be left default

gerber files

https://github.com/James-workshop/Magnetic_Polarity_tester/blob/main/Gerber_PCB_%20Magnetic_Polarity_tester.zip

just are soldered according to the Schematic, they can be used, no need programming and debugging