Introduction: Simple Water Sensor
I will Teach you how to make a simple water sensor circuit
Step 1: Gather Parts
Step 2: Learn the Layout
Read Circuit Diagram
Step 3: Create PCB (skip Step If Using Proto Board)
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
these PCB schematics are free to use if I see them being sold buy anyone but me you will be contacted
Cheap and Easy Toner Transfer for PCB Making
The Saltwater etch process
Step 4: Build It
Build time will update once I make the PCB
Step 5: Connect to HHO Cell or Any Other Water Sening Probe
Here are some mock ups of how to connect it to a HHO Cell or just detect water.
Step 6: 12 VOLT CIRCUIT
Here is how to setup the circuit to run on 12 volts from a car battery the circuit is still the same just some resistors are added to the probes to protect the transistor and a larger resistor to protect the LED
vederstein made it!
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Please be positive and constructive.