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Bill of Materials

This page provides a complete list of parts needed to build the LeKiwi mobile manipulator. Our total cost is displayed in the table 1.

Price US EU
12V $498.21 €542.56
5V $534.95 €525.9
Base only (5V) $299.95 €302.9
Base only (12V) $267.43 €305

Note

Prices and items may vary depending on geographic location and time of purchase. If you find links for other countries or cheaper suppliers, please create an issue or PR so that we add them to the list!

Important

There are now two options regarding motors and electronics (as also the case with the SO100 arms), either 5V or 12V. If this is the first time you build robots please choose the 5V version as it’s a little bit easier to assemble. If you are more experienced and want to lift heavier objects choose the 12V version.

These parts are the same for both versions:

Mobile Base Structure:

Part Amount Unit Cost (US) Buy (US) Unit Cost (EU) Buy (EU)
4" Omni wheels 3 $9.99 VEX Robotics €24.5 RobotShop
M2 M3 M4 Assorted Screw Set 1 $14.99 Amazon €23.5 Amazon
M3x50mm Standoffs 1 $5.99 Amazon €10.3 Amazon
Total $50.95 €107.3

Sensors and Compute:

Part Amount Unit Cost (US) Buy (US) Unit Cost (EU) Buy (EU)
Raspberry Pi 5 (4GB) 1 $60.00 Adafruit €57.00 Mouser
USB camera2 2 $12.98 Amazon €12.00 Amazon
microSD card 1 $21.99 Amazon €10.00 Amazon
Total $108 €91

Other

Part Amount Unit Cost (US) Buy (US) Unit Cost (EU) Buy (EU)
Table Clamp 4pcs 1 $18 Amazon € 21 Amazon
Screwdriver Set 1 $6 Amazon €10 Amazon
USB-C to USB-A Cable 2 pcs 1 $7 Amazon €7 Amazon
Total $31 €38

12V version 🔋

Mobile Base Electronics (12V):

Part Amount Unit Cost (US) Buy (US) Unit Cost (EU) Buy (EU)
12v 5a Battery 1 $32.99 Amazon €32.99 Amazon
Lever Wire Connector 1 $6.70 Amazon €7.18 Amazon
12v 5a DC plug connector 1 $9.49 Amazon €8.99 Amazon
12v to 5v 5a USB-C converter 1 $9.99 Amazon €9.99 Amazon
12v ST3215 Feetech Servo 3 $13.89 Alibaba €13.38 Alibaba
Total $108.5 €106.7

SO-100 2 Robot Arm Teleoperation Set (12V):

Part Amount Unit Cost (US) Buy (US) Unit Cost (EU) Buy (EU)
12v ST3215 Servo 12 $13.89 Alibaba €13.38 Alibaba
Motor Control Board 2 $10.55 Amazon €12.00 Amazon
Power Supply 1 $12 Amazon €15 Amazon
Total $199.78 €199.56

5V version 🔋

Warning

This powerbank can deliver the needed power but the USB-C cable to DC cable "can't communicate" on it's power needs like USB-C cables normally do (explanation). This means the USB-C to DC cable outputs 9V with this battery. The FeeTech motors will sometimes consider this "overvoltage" (designed for 7.4V), and start blinking it's led red, and also move in a more shakey way. This can be "solved" by replugging the DC plug in the motor controller (maybe a couple of times) until the red led stops blinking. If there are people with other powerbanks that work better we would love to hear this and these alternatives, to fix this.

Mobile Base Electronics (5V):

Part Amount Unit Cost (US) Buy (US) Unit Cost (EU) Buy EU
20000maH 85W Power Bank 1 $42 Amazon €50 Amazon
STS3215 Servo 3 $15 Alibaba 13€ Alibaba
USB-C Cable 2pcs (1feet/0.5 m) 1 $8 Amazon €7.6 Amazon
USB-C To DC Cable 1 $8 Amazon €12 Amazon
Total $103 €108.6

SO-100 2 Robot Arm Teleoperation Set (5V):

Part Amount Unit Cost (US) Buy US Unit Cost (EU) Buy EU
STS3215 Servo 12 $15 Alibaba €13 Alibaba
Motor Control Board 2 $11 Amazon €12 Amazon
Power Supply 1 $10 Amazon €13 Amazon
Total $212 €193

Head to 3D Printing for the next step!



Footnotes

1: Doesn't include cost of 3D printing

2: Another supported camera option is the Arducam 5MP Wide Angle found here