These provide the user with standard presets as well as the ability to smoothly adjust the focus of light with a simple turn of the wrist. Embedded within the Luxor 2 flashlight's aluminum body is a ...

With this circuit, any type of LED can be driven from a single-cell supply in the range of 1.0 to 1.5 V (see the figure). As a result, it can be used with alkaline, carbon-zinc, NiCd, or NiMH cells ...

If you purchase an independently reviewed product or service through a link on our website, Rolling Stone may receive an affiliate commission. Whether you’re dealing with a blown fuse or a ...