✦Step 1:-Prepare 1x led, 1x transistor, 1x buzzer, solder them together.
✦Step 2:-Connect 2 copper wires at the bottom.
✦Step 3:-Insert the copper wire probe into the diaper.
✦Step 4:-The baby will immediately trigger the sound and the light alarm after the bed wetting.
『LED』view more ⇒ https://www.utsource.net/category/led-lighting-1.html
『IC chips』view more ⇒ https://www.utsource.net/category/elec-component/ic-chips-1.html
『Transistor』view more ⇒ https://www.utsource.net/category/elec-component/transistors-1.html
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