assembly of conductivity flow loop

living with the lab

(in preparation for calibrating conductivity sensor)

living with the lab

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living with the lab

Mount PumpDrill pilot hole with #42 bit. Drill into a solid part of the pump. Orient the pump as shown with exit facing far side of system.

Use 1” long, #6 sheet metal screw

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living with the lab

Wiring with 5V and 12V Power Bus Strips, the Conductivity Sensor and the LCD

12VDC from power supply

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12VDC from power supply and into Vin and GND

regulated power from 5V and GND pins to bus strips

living with the lab

Wiring Tips

+

-

12VDC powersupply pump

5VDC power from Arduino to upper and lower breadboards

(use 22 gage wire & plug into 5V and GND pins)

switch

switch

Use a 12VDC power supply capable of supplying 1.5A to power the pump, the heater and the solenoid valves. This schematic shows a switch to power the pump and a switch to power the bus strip on the right side of the breadboard. Adding these switches makes it more convenient to test and troubleshoot your system.

We recommend that you power the Arduino and sensor circuits using a single 12VDC power supply. We will use diodes to diffuse back currents from the pump motor, relay coils, and solenoid coils.

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12VDC power from power supply to lower and upper breadboards

(use 22 gage solid core wire)

living with the lab

Install Switch & Plug

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use a larger wire here if a single wire carries the current for the pump, heater and valves

positive su

pply

positive su

pply

power to be run to pump power to be run to pump

power to be run to breadboard

power to be run to breadboard

living with the lab Other Views

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living with the lab Other Views

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living with the lab Other Views

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living with the lab Other Views

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