Light switch is probably one of the most touched objects in your house, without you really knowing it. What is more, light switch is a hidden factor that constitutes a jaw-dropping electrical bill. What would've been better in this coronavirus pandemic than an automatic light switch that both helps prevent the spread of corona AND reduce the electric cost?
PRICEAccording to this link, the cost of installing an automatic light switch from a traditional one is substantial. And who would want to go through all the trouble of hiring electrician?
Comparing with this, the automatic light switch is only about $20 dollars, which is like more than 10 times cheaper! And you could even experience the joy of making stuff and actually using it in the long term. See the price breakdown below.
PARTS:- Arduino Nano ($8)
- 2 Servos ($8)
- Sound Sensor ($4)
- Find your "target" light switch
- Find pieces of junk wood (I'm pretty sure there is some in your house. If not, cardboard or foam board would also do)
- Cut 2 pieces of wood (or boards, whatever) so that the switch itself sticks out from the wood.
- Then use hot glue to glue the parts to the board.
- Wiring parts according to this image:
- Upload the code onto Arduino Nano and you're set to go!
- If you want the light to automatically shut off, uncomment this part in the code.
- And specify your wishing wait-time here
- BONUSTIP: You'll kind of like a screw on the sound sensor. Twist it to the left will decrease its sound sensitivity. Twist it to the left will increase it.
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