This is a very easy tutorial - all you need is a chosen sound effect file (like a creepy growling animal or a person screaming) and a sneaky sound system. Play it during the middle of the night and freak out your friends.
Just updated your iPhone to iOS 18? You'll find a ton of hot new features for some of your most-used Apple apps. Dive in and see for yourself:
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News:
Infrared LEDs Protect Your License Plate Number from Police Cams
How To:
Learn about resistance and Ohm's Law and how they help you work on electronics
How To:
Program a USB development board for cheap
How To:
Measure RF in circuits in Bluetooth
News:
Recycle an old satellite dish into a WiFi booster
How To:
Eavesdrop from a Distance with This DIY Parabolic 'Spy' Microphone
How To:
Quick-N-Dirty Circuit Board Repair: How to Patch Faded or Corroded Traces with Pencil Lead
How To:
Turn Your Android Device into a Customizable Thermostat for Your Home
How To:
Build a high-powered air cannon that shoots rolled up T-shirts
How To:
Fix Dead Lithium-Ion Batteries That Won't Hold a Charge Anymore
How To:
Light a light bulb with a potato battery
How To:
Make a PVC Hand Pump to Move Water, Compress Air, & Create Vacuum
How To:
Convert Your Old Apple iMac G4 into a Cable-Ready HDTV
How To:
Make a satellite dish Wi-Fi antenna for free internet
How To:
Hack Christmas Lights for Custom Holiday Lighting Patterns
How To:
Hack a 20-Year-Old "Brick" Phone into a Digital Cell You Can Text On
How To:
Build a portable personal heater
How To:
Hack a Vending Machine in 3 Easy Steps
How To:
Use a breadboard, also known as a protoboard
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Lock and Unlock a Safe
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