How To Make Magnetic Tester With Hall Effect Sensor AH277A

What you need to build this Magnetic Tester 

-  AH277A or apx9141

-  220 Ohm Resistor

- red led

- green led

- power supply 5 volt

-  download circuit | http://j.gs/9lGg

Follow Me

https://www.facebook.com/Easyonee

https://twitter.com/Eaasyone

https://www.instagram.com/easyyone