Our resources are scarce, and one of the best ways to contribute is reducing wastage of water and electricity
In this instructable I have used a water flow sensor YFS201 to determine the rate of flow and integrated the total amount of liguid flow through it.
I have applied it to turn of the motor automatically on completely filling the capacity of the container
Step 1: Relay & Motor
Select a low requirement motor which doesnt suck in too much power, otherwise it'll burn the relay.
You'll need a 5V 20mA relay which can withhold the motor specifications on the connection end
Coneect one of the coil terminals to pin 13 and the other to ground
Connect one terminal of the motor to NO terminal of the relay
Connect the common terminal of the relay one of the termins to the AC mains.
Connect second terminal of the AC mains to the second terminal of the motor
Note: Some motors have an earthing pin. Connect it to the earth socket otherwise there a danger of electric shock.
Step 2: Connections
• Vin: 3V3
• Gnd: Gnd
• Out: D2
• terminal 1: D12
• terminal 2: Gnd
• Coil1: D13
• Coil2: Gnd
Step 3: Code
I have written my code to integrate the flowrate to give the total capacity in millilitres
Change the capacity level in my code (in millilitres)
Step 4: Compile, Run & Output
Compile and Upload the the code to the board
Now to start the motor, push the button
The motor will continue to work until the capacity is reached.
The motor will turn off automatically on reaching full capacity