This budget spreadsheet breaks down the total cost to build multiple units of both the bumper car robots and their controllers, split into mechanical parts and wiring components.Here is the breakdown of how the numbers add up:
Bumper Car Expenses
The robot mechanical section totals 216.92 dollars. This includes 4 ball casters for 21.96 dollars, 8 micro metal gearmotors for 183.60 dollars, and 4 dual-AA battery holders for 11.36 dollars.
The robot wiring section totals 247.28 dollars. This covers 8 Baby Orangutan B-328 microcontrollers for 183.60 dollars, 1 USB AVR programmer for 17.95 dollars, a 4-pack of Tattu batteries for 29.99 dollars, and connecting hardware for 15.74 dollars.
Controller Expenses
The controller mechanical section totals 26.66 dollars. This covers an 8-pack of the Gebildet joysticks for 9.99 dollars, a 20-pack of the slide switches for 4.99 dollars, and soldering supplies for 11.68 dollars.
The controller wiring section totals 27.80 dollars. This pays for 4 of the Pololu 5V step-up voltage regulators.Summary of TotalsWhen categorized by where you are buying the parts, you are spending 72.39 dollars on Amazon and 444.27 dollars on Pololu.
When categorized by type, the total mechanical hardware costs 243.58 dollars and the total wiring and electronics cost 275.08 dollars.
The combined subtotal for all components is 518.66 dollars. Adding a 10 percent estimated tax of 51.87 dollars brings the final grand total for the entire project setup to 570.53 dollars.