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Bill of Materials

ZeMo Parts

Item Quantity Price Description
Custom ZeMo Case
1
The custom 3D printed case houses the ZeMo hardware.
Custom ZeMo Circuit Board
OSH Park
1
$11.65
(minimum purchase 3)
This board houses the EZO™ circuit boards and the BNC connectors. We recommend 2oz copper for best results.
EZO™ pH Circuit
Atlas Scientific #EZO-pH
1
$38.00
This converts the reads of the pH probe into a form that the Raspberry Pi can read.
pH Probe
Atlas Scientific #ENV-40-pH
1
$72.00
This probe collects the pH data and connects to the female BNC connector on the pH circuit.
pH 7.0 Calibration Solution
Atlas Scientific #chem-pH-7
1
$9.00
This is a pH standard used for calibration.
pH 4.0 Calibration Solution
Atlas Scientific #chem-pH-4
1
$9.00
Optional.
This is a pH standard used for calibration. It is only necessary for 2 and 3 point pH calibrations.
pH 10.0 Calibration Solution
Atlas Scientific #chem-pH-10
1
$9.00
Optional.
This is a pH standard used for calibration. It is only necessary for 3 point pH calibrations.
EZO™ Dissolved Oxygen Circuit
Atlas Scientific #EZO-DO
1
$44.00
This converts the reads of the pH probe into a form that the Raspberry Pi can read.
Dissolved Oxygen Probe
Atlas Scientific #ENV-40-DO
1
$198.00
This probe collects the pH data and connects to the female BNC connector on the pH circuit.
Dissolved Oxygen Test Solution
Atlas Scientific #chem-DO
1
$18.00
This solution is used for calibrating the dissolved oxygen probe.
EZO™ Conductivity Circuit
Atlas Scientific #EZO-EC
1
$58.00
This converts the reads of the conductivity probe into a form that the Raspberry Pi can read.
EZO™ Conductivity Probe K 1.0
Atlas Scientific #ENV-40-EC-K1.0
1
$126.00
This probe collects the pH data and connects to the female BNC connector on the pH circuit.
Conductivity Calibration K 1.0 Set
Atlas Scientific #chem-EC-1.0
1
$11.00
This solution is used for calibrating the dissolved oxygen probe.
EZO™ Inline Voltage Isolator
Atlas Scientific #BE-IVI
2
$24.00
This isolates the incoming signal from the probes, preventing crosstalk between probes.
EZO™ Right BNC Connector
Digikey #WM5514-ND
4
$2.15
This isolates the incoming signal from the probes, preventing crosstalk between probes.
Raspberry Pi Zero WH
Adafruit #3708
1
$14.00
This is the mini computer that combines all the reads and sends them to our server via a WiFi connection.
PiTFT Plus 2.8" Resistive Touchscreen
Adafruit #2298
1
$34.95
This display connects to the Raspberry Pi, allowing users to view reads locally, calibrate meters, and adjust settings.
4GB MicroSD Card
Adafruit #102
1
$7.95
This stores the operating system for ZeMo on the Raspberry Pi.
Male to Female Jumper Wires
Adafruit #3633
1
$2.95
These are used to connect the ZeMo circuit board to the Raspberry Pi.
Jumper Wire Housing
Adafruit #3143
1
$1.95
This allows the jumper wires to connect to the circuit board.
Brass Standoffs
Adafruit #2336
3
$2.25
These secure and support the screen and Raspberry Pi.
MicroUSB to USB Cable
Adafruit #2185
1
$4.95
This cable connects the Raspberry Pi to the power supply and allows users to easily connect to the Pi after assembly to update software or troubleshoot issues.
5W USB Power Supply
Adafruit #1994
1
$6.95
This provides the power for the Raspberry Pi.


Tools for Assembly

Item Quantity Price Description
Soldering Iron
Adafruit #3685
1
$19.95
Some basic soldering is necessary for the hardware assembly..
Solder Wire
Adafruit #1886
1
$5.95
Some basic soldering is necessary for the hardware assembly.
Breadboard
Adafruit #64
1
$5.00
A breadboard is optional, but may be helpful for setting the EZO™ circuits.
Electrical Tape
Electrical tape can be used to insulate the jumper wires.