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  1. SMT LED removed and replaced with... ?

    Off-Topic Stuff
    I have a vape lighter I'm repurposing, and it has two surface mount LEDs that indicate two of its operating conditions. One LED indicates ready to light, the second lights when the coil is being powered. I don't need either LEDs and want to simply remove them, but not knowing the circuitry, I'm...
  2. Lighting: What resistor to use on LED light?

    Halloween Props
    Needing a LED light for an owl that I will be lighting his eyes up with. The only LED bulbs that I can find at my Radio Shack are just the bulbs without the resistor already attached. What is the rule of thumb on this? I plan on running it with a little 9 volt battery. Is there a formula for...
  3. LED wiring - Complete Tutorial

    Tutorials and Step-By-Step
    Finally! We finished the first in what we hope will be an ongoing series: Electronics Essentials This first episode covers off LEDs... what they are, how to hook them up and, most importantly, how to figure out what resistor to use to have everything work properly without frying your LEDs. We...
  4. Electronic/Software: Light/IR Sensors - Making an interrative haunt display. Any ideas?

    Halloween Props
    As most of you probably know, the "motion sensors" on many store bought props actually are some form of resistor that senses abrupt changes in light. The other day while playing with some of my store bought props, I had an idea that I'd like to use for next year. I would like to set up each...