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How to make an automatic night light switch
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This video shows you how to make a simple automatic night light switch the use few electronic components and easy to make.
The circuit also has led indicator but you can remove it if you want.
If you have no idea how to use a relay see this video
Component list
1 5 volts relay
2 BD 139
3 BD140
4 1 Kilo-ohms resistor
5 200 kilo-ohms resistor (or 200 kilo-ohms variable resistor if you want to adjust sensitivity)
6 LDR (light-dependent resistor)
7 LED (red, green, yellow is ok)
The circuit also has led indicator but you can remove it if you want.
If you have no idea how to use a relay see this video
Component list
1 5 volts relay
2 BD 139
3 BD140
4 1 Kilo-ohms resistor
5 200 kilo-ohms resistor (or 200 kilo-ohms variable resistor if you want to adjust sensitivity)
6 LDR (light-dependent resistor)
7 LED (red, green, yellow is ok)
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