Calculating resistance and power isn't hard... and, as David explains, knowing Ohm's Law and the Power Triangle can be darn useful when you're designing a project, sorting out power supply issues, or want to keep from burning your car down.
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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Build a low cost portable hamstick antenna
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Hack Christmas Lights for Custom Holiday Lighting Patterns
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Hack RFID enabled credit card & steal money for cheap
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Write in Midair with LEDs
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Convert Your Classic Game Boy into a Powerhouse Emulator That Plays Practically Any Retro Game
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Eavesdrop on a Bluetooth headset
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Light a light bulb with a potato battery
How To:
Build a simple carboard magnet generator
How To:
Fix Dead Lithium-Ion Batteries That Won't Hold a Charge Anymore
News:
Infrared LEDs Protect Your License Plate Number from Police Cams
How To:
DIY Stick Welder from Old Microwave Parts
How To:
Make a satellite dish Wi-Fi antenna for free internet
How To:
Hack a Pair of Cheap Active Shutter 3D Specs into Light-Detecting, Auto-Tinting Sunglasses
How To:
Hack Your Old Computer Mouse into Retro Wireless Bluetooth Mouse!
How To:
Increase the power of a 5mw green laser pointer
How To:
Fix a HP tx1000 laptop black screen with a penny
How To:
Quick-N-Dirty Circuit Board Repair: How to Patch Faded or Corroded Traces with Pencil Lead
How To:
Make a PVC Hand Pump to Move Water, Compress Air, & Create Vacuum
How To:
Repair or Replace Your Broken Headphone Jacks
How To:
Build a low cost portable hamstick antenna
How To:
Convert Your Old Apple iMac G4 into a Cable-Ready HDTV
How To:
Hack Christmas Lights for Custom Holiday Lighting Patterns
HowTo:
Write in Midair with LEDs
How To:
Hack RFID enabled credit card & steal money for cheap
How To:
Convert Your Classic Game Boy into a Powerhouse Emulator That Plays Practically Any Retro Game
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Make a Powerful Handheld Rocket Launcher from PVC and Sprinkler Parts
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