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  • JayGeeBSE commented on Nikus's instructable 5 Simple Ways to Determine LED Polarity8 months ago
    5 Simple Ways to Determine LED Polarity

    For some one who's first language is not English, this is very well written - until you got right to the end with "6. Conlusion". A typo obviously. I'm a little worried about the suggestion of powering an LED from AA cells with no series resistor - you've already pointed out the risk of frying LEDs that way. You will be OK with button cells as they have limited current output - though you might need 2 or 3 to get enough volts to work an LED. These later options won't work with IR LEDs of course.

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  • JayGeeBSE commented on lonesoulsurfer's instructable How to Build Your 1st Circuit8 months ago
    How to Build Your 1st Circuit

    Pin 7 is used to discharge the capacitor. So changing the value of the 10K resistor controls how long the LED is lit in each flash. For minimum power use you want short flashes with big spaces between.

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