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furrydonut
modified 9 years ago

120v LED bulb

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112
01:34:47
A design to drive an LED from mains voltage. LED is a 1W 3.8v natural white from China.
published 9 years ago
hurz
9 years ago
120Vrms are 170V peak and 170Vp - 2*3.8V = 162Vp. 162Vp / 100mA = 1.62kOhm. 1/(2*pi*f*1.62kOhm) = 1.64uF. So you need in parallel to 680nF additional 1uF. Hope this helps.

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