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Last Updated on: Thursday, November 16, 2017 06:32 AM

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More  LED Circuits

30 LED Night Light
This circuit is also found in Circuit Solutions Section

This Hobby Circuit uses a capacitor to limit the current through a series-parallel string of 30 LEDs.15 LEDs are wired in series in one direction and 15 more in the other direction. The capacitor limits the average current to about 20ma. The 100 ohm metal oxide resistor acts as a fuse. 

As the sketch to the left depicts, the final product would have three clusters of 10 LEDs on three sides of plastic block.  This would be plugged into the 120vac outlet. 

They might be angled slightly inward toward the wall, so light would spill onto the wall behind the device. 

With quality white LEDs the device should last for 10 or more years.

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