An EMF detector lets you pick up on electromagnetic fields, a useful tool if you're into amateur ghosthunting. To make this, you will need some wire, a resistor, and an LED. You will also need an Arduino to use as a controller.
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Fix Dead Lithium-Ion Batteries That Won't Hold a Charge Anymore
How To:
Make a satellite dish Wi-Fi antenna for free internet
How To:
Build a mini hovercraft with household items
How To:
Extract an RFID chip from a card & make it wearable
How To:
Hack a coin operated laundry machine
How To:
Hack a satellite dish into a WiFi signal booster
How To:
Quick-N-Dirty Circuit Board Repair: How to Patch Faded or Corroded Traces with Pencil Lead
How To:
Hack Your Electricity Meter
How To:
Make an Infrared Mask to Hide Your Face from Cameras
How To:
Build a radar from cheap satellite dish parts or a toy radar gun
How To:
Build a weatherproof compact high gain WiFi antenna
How To:
Bypass cable locks, just in case you have to
How To:
10 Unique & Practical Ways to Repurpose Your Old Hard Disk Drives
How To:
DIY Stick Welder from Old Microwave Parts
How To:
Build a Deadly Motion-Activated Airsoft Turret Gun
How To:
Build a Remote-Controlled Water Gun (Or Flamethrower!)
How To:
Make a Super Secret Batman-Style Bust Switch for Your Batcave (Or Just Your Lights)
How To:
Increase your wireless signal strength with a soda can
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Hack a laser pointer into a burning laser
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