Lesson 6— Electronics for kids — Using a NOT gate for a night light

Rahul Agarwal
2 min readApr 22, 2023

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This story is part of a series. See this starting page for links to other lessons.

In this lesson we will create a night light that turns on when its dark and turns off when there is light.

Recall Lesson 4 where we used a LDR that made a light and buzzer turn on when there was light and turn off when there was no light. Now we want the opposite to happen so we can use the NOT gate from Lesson 5.

All components can fit in a single board if you only have one. Otherwise just connect the prior two lessons as shown.

Breadboard visual for circuit to create a night light using a NOT gate
Breadboard visual for circuit to create a night light using a NOT gate
Circuit diagram to create a night light using a NOT gate
Circuit diagram to create a night light using a NOT gate

Next we will see how make the OR and AND logic gates and use them in some useful circuits.

This story is part of a series. See this starting page for links to other lessons.

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