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How to make a rain alarm

How to make a rain alarm

Author: Date: 07/04/2018

Step 1: Grind the oxide layer of copper clad laminate with sandpaper, and draw lines on the raindrop sensor board with marker pen


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The lines I painted is ugly

Step 2: Corroding the board in etchant


SupplierFile/201807/03/f_eb77cf863db741348821e6e967d4b553.jpg


Pls take a look, the water was still transparent at the beginning.

Being corroded...

 

SupplierFile/201807/03/f_7f01d3fd1dc147ad95e42ba788f8ea56.jpg


Corrosion is now halfway. The water seems like a little blue (about 45 minutes later).

Finished.


SupplierFile/201807/03/f_fe0ace91ebd34d51a81ba34b7a708958.jpg


Obviously we can not see the copper now.

The water looks pretty.

 

SupplierFile/201807/03/f_7c25c45897334b8bbef554d715af0c2c.jpg


Step 3: Rub off the black line with sandpaper after drying (you can use alcohol, I don't have alcohol...)


SupplierFile/201807/03/f_aa655e9899ac44719c46af0f939075b1.jpg


Step 4: Drilling (using a homemade small drill, 1.0 bit)


SupplierFile/201807/03/f_bdc51e044b2c411094faca1075f35b67.jpg


Step 5: Solder the lead wire to the raindrop sensor board


SupplierFile/201807/03/f_7939cce7f808496a92e33ac035ed6fdd.jpg


Step 6: Solder the buzzer module, here is the active buzzer


SupplierFile/201807/03/f_6748c7a15d394fe8bcc8858bbac7ad54.jpg


Here is the circuit diagram


SupplierFile/201807/03/f_acacc89214eb42968cdaf28d3d849765.jpg


Finally, connect the raindrop sensor board and the buzzer board together.

 

SupplierFile/201807/03/f_7373f81e73d145c5a29ca1370c8cf9cd.jpg

 

 

 

 

 

Source from:Geekfans

Translated by:Utsource




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