Arduino EMF (Electromagnetic Field) Detector

A while back I saw an EMF (Electromagnetic Field) Detector at makezine.com that used a led bargraph. I decided to modify it to use a 7-Segment LED Display! Here’s my project. Sorry I don’t have any pictures of it in use. Hopefully I can post some soon.
Credit goes to Aaron ALAI for the original project. Also Conner Cunningham at Make: for doing a remake.
Have fun, work hard, & play nice! If you have questions please ask them

Step 1: The Stuff:

Arduino EMF
The parts & tools.
Parts:
– Arduino
– 7-Segment LED Display
– 3.3M Resistor (Orange, Orange, Green)
– 470 ohm resistor (Yellow, Violet, Brown) or a similar value for the LED display
– Wire. I’m using 26 gauge wire
– Breadboard
Tools:
– Computer with Arduino IDE
– USB A-B cable for Arduino
– Wire Strippers

Step 2: Wire the 7-Segment LED Display

Wire the 7-Segment LED Display
This is probably one of the most confusing parts of the project, so I’ll try to be clear. But if I’m not please ask any questions you have.
I used pins 2-8 on my arduino for the display. I wired the pins on the display counter-clockwise starting at the upper-left corner. Hopefully the pictures help explain it better.
Picture 1) Display before installation.
Picture 2) Display after installation.
Picture 3) Pin 1 on the display goes to pin 2 on the Arduino.
Picture 4) Pin 2 on the display goes to pin 3 on the Arduino.
Picture 5) Pin 4 on the display goes to pin 4 on the Arduino.
Picture 6) Pin 5 on the display goes to pin 5 on the Arduino.
Picture 7) Pin 6 on the display goes to pin 6 on the Arduino.
Picture 8) Pin 8 on the display goes through the 470 ohm resistor to the side rail on the bread board
Picture 9) Pin 9 on the display goes to pin 7 on the Arduino. Also Ground on the arduino is connected to the side rail on the arduino.
Picture 10) Pin 10 on the display goes to pin 8 on the Arduino.
If you have any question please ask them!
For more detail: Arduino EMF (Electromagnetic Field) Detector


About The Author

Ibrar Ayyub

Ibrar Ayyub is an experienced technical writer with a Master's degree in computer science from BZU Multan University. He has written for various industries, mainly home automation, and engineering. He has a clear and simple writing style and is skilled in using infographics and diagrams. He is a great researcher and is able to present information in a well-organized and logical manner.

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