Cost Breakdown of Components

Components

Chassis and wheels:

–         Chassis = £6.57

–         2x gearmotor = 3.88×2 = £7.76

–         2x Encoder = 6.62×2 = £13.24

–         2x Motor cable = 1.74×2 = £3.48

–         2x Motor brackets = 2.06×2 = £4.12

–         2x ball caster = 2.23×2 = £4.46

o  Total = £39.63

Extras:

–         2x ultrasonic sensors = 1.45×2 = £2.90

–         Variable potentiometer = £1.56

–         Adafruit seesaw board = £4.80

–         OLED screen = £8.00

o   Total = £17.26

Touchbars and Line Following:

–         4x microswitch (touchbars) = 0.71×4 = £2.84

–         4x white LEDs = 0.40×4 = £1.60

–         4x LDRs = 1.25×4 = £5.00

–         4x 330 res = 0.02×4 = £0.08

–         4x 10k res = 0.03×4 = £0.12

o  Total = £9.64

IR Circuit:

–         2x IR receiver = 1.06×2 = £2.12

–         2x IR emitter = 0.27×2 = £0.54

–         6x ceramic capacitor = 0.67×6 = £4.01

–         Electrolytic capacitor = £0.05

–         Film capacitor = £0.08

–         2x green LED = 0.04×2 = £0.08

–         Transistor = £0.05

–         3x 1k resistor = 0.02×3 = £0.06

–         3x 1M resistor = 0.02 = £0.06

–         47k resistor = £0.02

–         62k resistor = £0.03

–         2x 100 resistor = 0.02×2 = £0.04

–         5x 10k resistor = 0.03×5 = £0.15

–         3x diode = 0.02×3 = £0.06

–         NAND gate = £0.57

–         Printing cost and 35um PCB = £40.00

o  Total = £47.92

Screws and Standoffs:

–         4x hex threaded spacer 12mm = 0.09×8 = £0.72

–         8x M2 x12mm nylon screw = 0.09×8 = £0.72

–         8x M3 x10mm nylon screw = 0.05×8 = £0.40

–         8x M2 nylon full nut = 0.07×8 = £0.56

–         Wire 4 meters = 0.21×4 = £0.84

o  Total = £3.24

Microcontroller Board:

–         Microcontroller dev board = £3.94

–         Motor Driver Carrier = £8.67

–         Switch = £0.15

–         Small signal Schottky diode = £0.19

–         2x Pin header = 0.31×2 = £0.62

–         5x Terminal block 4 way = 1.06×5 = £5.28

–         3x terminal block 3 way = 0.90×3 = £2.70

–         2x terminal block 2 way = 0.63×2 = £1.26

–         Slide switch = £0.69

–         IC header 32 way = £2.56

–         PCB receptacle = £2.91

–         Bespoke PCB = £5.63

–         Nickle hydride battery = £11.65

–         Male connector = £2.00

–         Heat-shrink tubing = £0.18

o  Total = £48.44

Micromouse Total = £166.13

Using the cost-sheet provided by the lab technicians, I was able to make this cost breakdown list.

Our team has been careful and sparing about how many components we used, and this shows in the relatively tiny cost of building our mouse.

Micromouse Total Cost = £166.13

 

By Bel Rushman