Step 3: Create PCB (skip step if using Proto board)

water sensor circuit.PNG
12v water sensor.PNG
The Schematic is made with ExpressPCB which is a free PCB Layout Software you can download it here
Than Download the PCB file and open and print it and make your PCB. Here are a few links to Instructibles that show you how to make a PCB
water sensor.pcb is 3v
water sensor2.pcb is 12v
5pcb
Cheap and Easy Toner Transfer for PCB Making
The Saltwater etch process
 
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