Member Since: July 6, 2009

Country: Australia

  • Hello, I’m making a infrared light pen, Can someone sanity check this for me?
    According to : (Supply Voltage 1.5v Voltage Drop Across LED 1.4v Desired LED Current 50ma ) apparently I need a 2.2 Ohm resistor? would this be correct running off a AAA battery?
    I’m looking to produce as much light possible from the led. I can change the power source if need be. is this calculation correct?

  • @Xirvin you can also use most mobile phone cameras to see if its on. :)

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