Cell Phone Holder For Running

How can a power a single led with a power supply?

I want to power a single led with a power supply from the wall. I use just a single blue led for a nightlight for my aquarium. Anyway, how it runs now is the led is a 3.8v and it is connected to a resistor, then to some lamp cord like copper wire, and then to a 4 “AAA” battery holder with on/off switch that i got from radioshack. I dont want to keep using batteries to power the led since it will cost a lot to keep changing batteries when i want to run it on average 6 hours a night. It is just my little diy project i am trying. I just want to know how to wire the led to a power supply to the wall. I know nothing about electric as far as that. Like can use a cell phone charger or some other type of plug? I don’t know. Just tell me what parts i need and how to do it. I have a soldering iron at home, so i guess thats a plus.

You’ll need a transformer with the correct output voltage. Radio Shack should be able to help.

iPhone goes swimming! DryCASE Waterproof Underwater mp3/mobile/cell phone Case+Armband

Cobra CPI 1575 1500 Watt 12 Volt DC to 120 Volt AC Power Inverter $189.95 This inverter provides household power on the go. It converts battery power to 120 V AC household power, allowing you to power up office equipment and household appliances from your vehicle. This unit is ideal for such appliances as microwave ovens (1000 watts or less), coffeemakers, laptops, TVs, video game consoles, CD and DVD players, cell phone chargers, and more. Power equipment and applia…

Fenix Flashlight Headband (Fits lights with 18-22mm Diameter) $19.95 The Fenix PD32-R5 315 Lumens Cree LED Flashlight (Black) is a high intensity flashlight in small size for outdoor use. It features four brightness levels, strobe and SOS functions. Powered by two CR123A Lithium batteries or one high capacity 18650 Li-ion battery, PD32 delivers max 315 lumens of brightness and max 200 hours of runtime.Compact design, user-friendly side switch for selecting output, …

Adidas Micoach Armband Black $10.95 The adidas miCoach Armband built to go the distance is also built to keep your smartphone close at hand and safe from the elements. An ultra-lightweight performance nylon band wraps around your upper bicep. A sweat-proof touch-through screen cover protects your phone’s touchscreen. Inline pocket holds a house or gym key. Strategically placed ports accept headphone or headset plug….

Black Protective Active Workout Armband Carrying Case Cover with Adjustable Velcro Strap for T-Mobile MyTouch 4G, HTC HD 7, HTC HD 2, Sprint HTC EVO 4G, Samsung Focus i917, Samsung Vibrant T959, Samsung Fascinate SCH-i500, and AT&T Samsung Surround + SumacLife TM Wisdom Courage Wristband $11.99 This Neoprene Workout Armband has been manufactured to fit your mobile phone. The neoprene material used to make this armband protects your phone from unwanted bumps, dents, and scratches from accumulating. This neoprene material is also very light weight and avoids moisture build up, making this armband great for working out at the gym, jogging or running around. This armband has been designed wi…

Adjustable Velcro Cell Phone Holder, Black [Apparel] [Misc.] $6.93 …

Nike Running Arm Wallet/phone Case $10.99 Keep your phone and valuables secure in the expandable Nike Running Arm Wallet/Phone Case. Adjustable stretch fit wraps comfortably around your arm for convenient, on-the-go storage….

Security Arm Wallet – Wrist Pouch $14.94 Zippered wrist pouch for wearing on your arm…

NIKE RUNNING ARM WALLET / PHONE CASE ROYAL BLUE Adjustable Fit, Reflective Pattern $18.95 Case designed to hold your valuables around your arm while exercising, running, jogging, etc. Perfect to hold money, keys, or a small phone. This case WILL NOT fit the iPhone or similarly sized phones….

Bracketron RWA-201-BL Golf Cart Mount with Grip-iT for GPS $29.95 Universal GPS Mounting System…Quick And Easy Mounting! It’s a quick and easy mounting system that secures most portable devices such as GPS units, iPhones, iPods, Satellite Radios, MP3 Players, mobile phones and PDA’s. Bracketron Universal Cup-It GPS Mounting Kit features: Sturdy shaft and 360* rotating capability adds more adjustability Provides easy viewing of mobile device and a secure base G…

Samsung Verizon DROID CHARGE SCH-i510 Vehicle Mount (ECS-V994BEGSTA) – Retail Packaging – Black $16.13 The vehicle navigation mount holds your Droid Charge Handset securely while you travel.The Vehicle Power Charger is connected directly to the mount so that when your Droid Charge Handset is docked, its charging. The mount automatically charges your Droid Charge Handset without you having to plug / unplug the Vehicle Power Charger. It’s truly brilliance on the go….