Budget and Timeline

Mower and Docking Station Materials

DescriptionQtyVendorLinkPriceExtended Price
Raspberry Pi 3B+2AmazonLink$38.18$76.36
Witty Pi 31EbayLink$35.00$35.00
Car Kit1AmazonLink$79.00$79.00
L298N H-Bridge Motor Controller1AmazonLink$6.99$6.99
VNH5019 Motor Drive Module1AmazonLink$11.99$11.99
DC-DC Buck Converter Step Down Module 10A1AmazonLink$10.99$10.99
Solar Panel 10W 12V (Flexible)1AmazonLink$11.39$11.39
Solar Panel 10W 12V (Polycrystalline)1AmazonLink$24.99$24.99
Solar Panel Controller (Mower)1AmazonLink$23.99$23.99
Solar Panel Controller (Docking Station)2AmazonLink$9.99$18.98
Docking Station Battery (12v, 9Ah, SLA)1AmazonLink$21.99$21.99
Mower Battery (12v 6Ah, Lithium Iron)1AmazonLink$39.99$39.99
XH2.54 Connector1AmazonLink$1.80$1.80
ON/OFF power button 12V 20A2AmazonLink$9.16$18.32
Bumper Sensor2AmazonLink$0.40$0.80
3D Printed Parts (Shroud, Bumper)3JawstecLink$10.00$30.00
Blade Motor kit1EbayLink$29.95$29.95
Compass / GPS Module1AmazonLink$18.59$18.59
simpleRTK2B – Starter Kit MR – Without headers1ArdusimpleLink$657.80$657.80
Female Threaded Round Standoff (Widening Kit)16McMasterLink$0.88$10.56
18-8 SS Screw 6-32, 1/2″ (pack of 100) (Widening Kit)1McMasterLink$3.56$3.56
6″ x 12″ 6061 Aluminum sheet, 0.09″ thick (Widening Kit)1McMasterLink$12.20$12.20
Nylon Spacer 1/4″OD, 1/8″ Long (pack of 100)1McMasterLink$9.84$9.84
Steel Hex Nut 6-32 (pack of 100)1McMasterLink$1.28$1.28
12″ x 12″ polycarbonate2McMasterLink$6.21$12.42
Wood for Docking Station1LowesN/A$10.00$10.00
Fastening Hardware Kit1LowesN/A$12.00$12.00
Inductive Charging Coil1AmazonLink$22.48$22.48
DC-DC Step Up Buck Converter1AmazonLink$3.33$3.33
Touchscreen Controller for Raspberry Pi 3B+1EbayN/A$50$50

Total Price = $1,267.59

Additional tools and supplies purchased for testing and evaluation

The purpose of these items was to both evaluate the units and to provide team members the ability to work from home and social distance. These will not be part of the final design.

DescriptionQtyVendorLinkPriceExtended Price
Raspberry Pi 3 CanaKit +7″ touch screen1EbayN/A$59.45$59.45
Test Car Kit (Steppers, controllers, ect)1AmazonLink$138.99$138.99
Compass / GPS Module (1 for test, 1 for installation)1AmazonLink$18.59$18.59
Handheld Tachometer (rotational speed of cutter)1EbayLink$20.74$20.74
DC Battery Monitor (quick voltage reading)1AmazonLink$17.99$17.99
USB Extension Cable RA (x2)(for direct Rasp Pi Inputs)1AmazonLink$8.99$8.99
HDMI 90 Degree RA adapter (for Rasp Pi display)1AmazonLink$6.99$6.99
HDMI to DVI adapter cable (for Rasp Pi display)1AmazonLink$6.76$6.76

Total Price = $278.50