To build our bot we will need the following materials. In some cases we will be able to sustitute some of them but that wil depend on our budget and level of exepertise in order to handle those modifications.

Electronics

1. 1x Arduino UNO and its USB cable
2. 2x Geared 5V Stepper - adafruit.com/products/858
3. 1x ULN2803 Darlington Driver
4. 1x Half-size breadboard
5. 20x Male-male jumpers
6. 1x Micro servo - adafruit.com/products/169
7. 1x Male pin header - digikey.com/short/t93cbd
8. 1x 2 x AA Holder - digikey.com/short/tz5bd1
9. 1x-3 x AA Holder - digikey.com/short/t5nw1c
10. 1x-470 uF 25V capacitor
11. 1x SPDT slide switch (but I recommend a bigger switch)
12. 5x AA Batteries

Mechanics

1. 2x 1 7/8” ID x 1/8” O-ring - mcmaster.com/#9452K96
2. 1x Caster 5/8” bearing - mcmaster.com/#96455k58/=yskbki
3. 10x M3 x 8mm pan head screw - mcmaster.com/#92005a118/=z80pbr
4. 4x M3 x 6mm flat head screw - mcmaster.com/#91420a116/=yskru0
5. 12x M3 Nut - mcmaster.com/#90591a250/=yskc6u3D
6. 2x 1/4” thread forming 4 -20 screws http://www.mcmaster.com/#90380A106
7. 3D printed parts made of PLA+

3D printed parts

1. caster
2. chasis-arduino
3. pen-collar
4. pen-holder
5. stepper-bracket
6. wheel (Needs fix)