Simple and Cheap Water Leak Alarm Sound and Light

Water Leak is a problem that can happen in almost every home. I made a simple alarm Circuit for water leak warning. I hope it works for you too.

Supplies

• Mini plastic container (I've used a toothpick box)

• 2N2222, 2N3904 or any other NPN transistor

• 5mm Animated LED (You can get from a cheap ugly battery powered candle.) This Ugly Things

• 12mm Piezo Buzzer for Annoying Alarm (You can get from broken UPS or cheapp door alarm)

• M3x10 Bolts&Nuts

• Fork Terminal Cable Lug

• scrap cable

• 9V Battery

• 680R 1/4W Resistor

• 1K Resistor

Step 1: Prepare Container

Drill 3 hole bottom of the plastic container. Mount nuts and bolts together with cable lugs for water contact terminal. Solder cable to lugs for connect the circuit board.

Step 2: Solder the Circuit

Solder the parts according to schematics. After that install battery and the circuit board inside the box.

Step 3: You've Done. Test It

Test inside the sink. You don't need a Flooding ;)