Page Contents

Qty. Component $/Unit Subtotal
1 Electronics Housing $35.00 $35.00
1 Power Supply $35.00 $35.00
1 5V Power Adapter $10.00 $10.00
2 Wire Nuts $0.50 $1.00
1 Raspberry Pi 3 $40.00 $40.00
1 MicroSD Card $15.00 $15.00
1 Arduino Mega $15.00 $15.00
1 RAMPS shield $15.00 $15.00
4 Stepper Drivers $6.00 $24.00
1 USB Cable $5.00 $5.00
4 NEMA 17 Stepper Motors, Rotary Encoders, and Cables $70.00 $280.00
3 Cable Carriers $35.00 $105.00
1 Universal Tool Mount Cable $35.00 $35.00
1 Soil Sensor $5.00 $5.00
1 Solenoid Valve $8.00 $8.00
1 Vacuum Pump $15.00 $15.00
1 FarmBot Power Cable $10.00 $10.00
2 RAMPS Supply Cables $10.00 $20.00
1 Raspberry Pi Power Cable $10.00 $10.00
1 Vacuum Pump Cable $10.00 $10.00
1 Solenoid Valve Cable $10.00 $10.00
1 Borescope Camera $35.00 $35.00
1 Sockit Box $25.00 $25.00
4 Jumper Links $0.25 $1.00
37 TOTALS   $764.00

Electronics Housing

This waterproof housing protects FarmBot’s electronics from rain and debris. It has a clear front cover and keeps water out with a rubber gasket.

Material Polycarbonate
Rainproof? Yes
Cover Color Clear
Height 8.75”
Width 5.75”
Depth 3”
Cover Type Lift off, screw mounted
Recommended Supplier McMaster Carr - Part Number 1037N9
Price $35.00
Quantity 1

Power Supply

The power supply works with both 110V and 220V AC power.

Output 12 volt, 29 amp DC
Input 110 or 220 volt AC
Brand Meanwell
Dimensions
Recommended Supplier OpenBuilds
Price $35.00
Quantity 1

5V Power Adapter

Trade Name UBEC DC/DC Step-Down (Buck) Converter
Input Voltage 6-23V
Output Voltage 5V (+-5%)
Output Current 3A continuous, 5A peak
Recommended Supplier Adafruit
Price $10.00
Quantity 1

Wire Nuts

Price $0.50
Quantity 2

Raspberry Pi 3

CPU 1.2Ghz Quad Core Broadcom BCM2837 64-bit ARMv8 processor
RAM 1GB LPDDR2 (900 MHz)
WiFi 2.4GHz 802.11n wireless, BCM43143 chip
Bluetooth Bluetooth 4.1 Classic, Bluetooth low energy (BLE)
Ethernet Built-in 10/100 Ethernet
USB 4x USB 2.0 ports
Storage MicroSD
GPIO 40-pin header
Recommended Suppliers Adafruit
Amazon
Spark Fun
Element14
Price $40.00
Quantity 1

MicroSD Card

Form Factor MicroSD
Capacity 8GB
Price $15.00
Quantity 1

Arduino Mega 2560

This is the microcontroller that powers FarmBot. It receives G-code commands from the Raspberry Pi and then sends signals to move motors, read sensors, activate peripherals, and more.

Microcontroller ATmega2560
Operating Voltage 5V
Input Voltage 7-12V recommended, 60-20V limts
Digital I/O Pins 54 (15 provide PWM output)
Analog Input Pins 16
DC Current per I/O Pin 40 mA
DC Current for 3.3V Pin 50 mA
Flash Memory 256 KB (8 KB used by bootloader)
SRAM 8 KB
EEPROM 4 KB
Clock Speed 16 MHz
Recommended Suppliers Sainsmart
Arduino
Amazon
Adafruit
Spark Fun
Price $15.00
Quantity 1

RAMPS Shield

Recommended Suppliers SainsSmart
Amazon
Spark Fun
Adafruit
Price $15.00
Quantity 1

Stepper Drivers

Trade Name A4988 Stepper Motor Driver Carrier (Header Pins Soldered)
Microstepping full-step, half-step, 1/4-step, 1/8-step, and 1/16-step
Output Current 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.0 A per coil with sufficient additional cooling)
Protections Over-temperature thermal shutdown, crossover-current protection, and under-voltage lockout, short-to-ground, and shorted-load
Adjustable? Current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
Connectors 0.1″ male header pins
Recommended Suppliers Pololu
Amazon
Price $6.00
Quantity 4

USB Cable

Connects the Raspberry Pi to the Arduino.

Connector 1 USB 2.0 Type A Male
Connector 2 USB 2.0 Type B Male
Length 6 inches
Recommended Suppliers Belkin/Amazon
Monoprice
Best Buy
Fry’s Electronics
Price $5.00
Quantity 1

NEMA 17 Stepper Motors with Rotary Encoders

Download the motor spec sheet and encoder spec sheet.

Motor Specs
Motor Resolution 200 steps/revolution (1.8 deg/step)
Winding Type Bipolar
Voltage 12V
Current Draw 1.68A
Wiring 4 wire
Shaft Diameter 5mm diameter
Mount Hole Pattern 4x M3 holes, standard NEMA 17 pattern
Cable Length 0.75m, 2.8m, and 4m
Cable Connector 1 (motor)  
Cable Connector 2 (RAMPS) 2.54mm pitch 4 pin dupont connector
Encoder Resolution 360 lines/revolution
Encoder Output Differential
Price * 0.75m - $65.00
* 2.8m - $70.00
* 4.5m - $75.00
Quantity 4 motors:
* 0.75m - 1
* 2.8m - 2
* 4.5m - 1

Motor cables

Encoder cables

Encoder cable connectors

Cable Carrier

These hollow plastic chains are used throughout FarmBot to manage cables and tubing.

Material Nylon PA66
Lengths X-Axis - 1.8m (90 links + end pieces)
Y-Axis - 1.6m (80 links + end pieces)
Z-Axis - 0.74m (37 links + end pieces)
Inside Height 15mm
Inside Width 40mm
Outside Height 20mm
Outside Width 48.2mm
Pitch 20mm
Bending Radius 28mm
Recommended Supplier Inventables
Price X-Axis - $42
Y-Axis - $38
Z-Axis - $25
Quantity 1 for each axis

Universal Tool Mount Cable

Number of Wires 12
Wire Markings The 1st through 11th wires are black and labelled with small white text. The 12th wire has green/yellow insulation.
Shielded? No
Wire Gauge 20
Length 3m
Outer Diameter 0.37”
Amps 6
Color Gray
Recommended Supplier McMaster Carr - Part Number 8082K14
IGUS
Price $35.00
Quantity 1

Soil Sensor

The Soil Moisture Sensor is a simple breakout for measuring the moisture in soil and similar materials. The soil moisture sensor is pretty straight forward to use. The two large exposed pads function as probes for the sensor, together acting as a variable resistor. The more water that is in the soil means the better the conductivity between the pads will be and will result in a lower resistance, and a higher SIG out.

Sensor Type Capacitive
Input Voltage
Input Current
Output Type Analog
Recommended Supplier SparkFun
Price $5.00
Quantity 1

Solenoid Valve

Inlet 3/4” NPT (National Pipe Thread)
Outlet 3/4” NPT (National Pipe Thread)
Operation Normally closed
Working Pressure Range 0.02 to 0.8 Mpa (3 to 116 PSI)
Flow Direction One-way, indicated by an arrow molded into the plastic
Input Voltage 12V
Current Draw 320mA
Power Consumption 3.84 Watts
Recommended Supplier Sparkfun
Price $8.00
Quantity 1

Vacuum Pump

Input Voltage 12V DC
Current Draw 1A
Recommended Supplier Spark Fun
Price $15.00
Quantity 1

RAMPS Power Cables

Length 3m
Gauge  
Wire Type Stranded copper
Number of Wires 2
Rated Voltage 12V DC
Inner Colors Red and black
Outer Color Black
Thickness  
Recommended Supplier McMaster Carr - Part Number 9697T2
Price $10.00
Quantity 2

Raspberry Pi Power Cable

Length 3m
Gauge  
Wire Type Stranded copper
Number of Wires 2
Rated Voltage 12V DC
Inner Colors Red and black
Outer Color Black
Thickness  
Recommended Supplier McMaster Carr - Part Number 9697T2
Price $10.00
Quantity 1

Vacuum Pump Cable

Length 3m
Gauge  
Wire Type Stranded copper
Number of Wires 2
Rated Voltage 12V DC
Inner Colors Red and black
Outer Color Black
Thickness  
Recommended Supplier McMaster Carr - Part Number 9697T2
Price $10.00
Quantity 1

Solenoid Valve Cable

Length 3m
Gauge  
Wire Type Stranded copper
Number of Wires 2
Rated Voltage 12V DC
Inner Colors Red and black
Outer Color Black
Width  
Recommended Supplier McMaster Carr - Part Number 9697T2
Price $10.00
Quantity 1

FarmBot Power Cable

Length 0.5m
Gauge  
Wire Type Stranded copper
Number of Wires 3
Rated Voltage 120V AC
Inner Colors White, Green, and Black
Outer Color Black
Thickness  
Price $10.00
Quantity 1

Borescope Camera

Resolution 1024 x 768
Waterproof? Yes
Focal Distance 1m
Outer Diameter 9mm
Camera Length 38mm
Cable Length 5m
Connection USB
Price $35.00
Quantity 1

Sockit Box

This rainproof box stores the power supply and vacuum pump, keeping them dry.

Rainproof? Yes
Color Black
Price $25.00
Quantity 1

Jumper Links

Material Aluminum
Thickness 1mm
Hole Sizes M3
Price $0.25
Quantity 4