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  • gdesmarais commented on mrstan's instructable Repair Dead COB LED Light Bulbs4 months ago
    Repair Dead COB LED Light Bulbs

    I noticed that the cheap Chinese corn bulb that I bought were having insufficient DC filter capacitor. Change the value from 5uF to 33uF will reduce light flicker and prevent voltage spikes.

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  • gdesmarais commented on randofo's instructable Floppy Disk IR Camera Hack10 months ago
    Floppy Disk IR Camera Hack

    The filter over the CCD sensor is actually a polarizing filter. It let pass the reflected light (polarized) while blocking the direct light (non polarized). It improve contrast in high luminosity environment. An IR & anti-reflective coating is likely to be included on the front side of this filter

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