[Simple version + upgrade version] ultra simple zero power consumption LED night light DIY

The purpose of DIY is to make a night light with as little overhead as possible. There is almost no technical content, that is, a picture is happy... good, step into the topic:

Materials required for DIY:

Advertising company eliminated white LED light board, waste network cable, empty mineral water bottle and jam bottle, crystal head, a resistor

DIY cost:

Excluding labor, less than one dollar.

DIY time required:

No more than 1 hour.

DIY steps:

First, remove a current limiting resistor from the original LED lamp board and change it to a resistor of higher power and resistance.

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