Make a tiny long-lasting LED torch

This project is to make a tiny torch that offers comfort in the night and a limited amount of illumination. Red is recommended since it affects sleep the least (and works for longest). A resistor is used to reduce the brightness of the LED, thereby increasing the battery life. You will need: An LED ...

By: BenjieGillam



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from Instructables: exploring - technology http://ift.tt/1ryDtZI