{"id":11779,"date":"2021-11-12T12:45:09","date_gmt":"2021-11-12T17:45:09","guid":{"rendered":"https:\/\/courses.ideate.cmu.edu\/62-362\/f2021\/?p=11779"},"modified":"2021-11-12T12:51:46","modified_gmt":"2021-11-12T17:51:46","slug":"project-2-meiger-counters","status":"publish","type":"post","link":"https:\/\/courses.ideate.cmu.edu\/62-362\/f2021\/project-2-meiger-counters\/","title":{"rendered":"Project 2: Meiger Counters"},"content":{"rendered":"

Meiger Counters<\/h1>\n
\"Meiger

Meiger Counter pointing at a ceiling ligtht<\/p><\/div>\n

Description<\/strong><\/h2>\n

A plain, black carrying case usually meant for industrial tools with two cutouts in the foam.<\/p>\n

Perfectly fit into the cutouts are two handheld meter-shaped devices, with boxy tops and a yellowed, plastic look. The handheld portions are opaque, while the top and bottom caps are made of a semi-translucent plastic. When taken out of their case and held in one hand, the user can see a meter labeled “magnetic field” going from 1 to 5 on the back. The front face on both meters is covered with an old, paper grid of red lines on yellowed paper. For one of the meters, the front features a coil wound around a stick, while on the other, a flat coil sits flush on the front surface.<\/p>\n

The meters emit a click noise intermittently, around once or twice a second. When a user holds them close to an electrical device, the meters begin to click much more rapidly, blending together into a stream of pulses. Most devices will trigger this faster click rate: lights, wall adaptors, chargers, computers. The LEDs flicker whenever a click is emitted, and the meter’s hand on the back corresponds roughly to the clicking rate.\u00a0<\/span><\/p>\n

 <\/p>\n

Final Photos + Function<\/strong><\/h2>\n
\"Removing

Removing Meiger counters from their carrying case<\/p><\/div>\n

\"Mid-presentation:

Mid-presentation: Andy standing in front of a slide which shows a graph of cancer rate vs childhood magnetic field exposure<\/p><\/div>\n

\"2nd

2nd generation Meiger counter, with a flat pack coil and round LED on top<\/p><\/div>\n

\"The

The two prototype Meiger counters in their carrying case, with the batteries removed and stored in a separate compartmenta<\/p><\/div>\n

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