PCBWay 3rd PCB Design Contest

AUTOMATIC WATER LEVEL CONTROLLER.

Hello Pcbway All members




Today I am back with another project called


$1 AUTOMATIC WATER LEVEL CONTROLLER.




It’s an automatic switching circuit that used to control an AC water pump. Operation of this circuit is simple.wen the water level goes below the limit the lower level sensor will detect it and activate the water pump.wen the water level reaches the upper limit the upper limit sensor detect it and switch of the water pump.






Step 1: My Goal




“To make a cheap but efficient water level controller under $1 budget to control AC water pump






The circuit




This is the driving circuit of the $1 AUTOMATIC WATER LEVEL CONTROLLER.




To make this circuit you will need




BC 547 Transistor X 3


220 K Ohm & 5.4 K Ohm resistors


1N4007 Diode


12V relay


One, 3-pin PCD connector & two, 2-Pin PCB connector


Wires


PCB




12v relay is the main component of this circuit, so please use a relay with 7Amp or more. I am using a 12v relay.it can handle 7 Amp AC @240v.




The Sensor

To make sensor you don’t need anything special. Take three wires and name them like LOW, HIGH AND MAIN. Place “MAIN” on the bottom of the tank. Then place “LOW” above the outlet. Finally place “HIGH” on the top of the water tank




[ ~~~~~~~~~~~~] -------------------------------------- “HIGH”




[~~~WATER~~~ ]




[ ~~ TANK ~~~~~]




[~~~~~~~~~~~~ ]




[~~~~~~~~~~~~ ]--------------------------------------- “LOW”




[______________]--------------------------------------- “MAIN”




This is the placing order of the sensors


Connect Them All




Bill of materials used in this project

Relay

1

Bc547

3

220 K Ohm & 5.4 K Ohm resistors

1

1N4007 Diode

1

One

2

3-pin PCD connector & two



Thanks Pcbway






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