# 🛒 Bill of Materials

<div style="text-align: justify;">

## Total Cost 

```{note}
Doesn't include cost of 3D printing, tools, shipping and taxes.
```

| Price | BRL | EUR | USD |
|-------|:---:|:---:|:---:|
| Structural Components | ~R$2103.18 | ~€458.66 | ~$1064.58 |
| Electrical System | ~R$902.4 | ~€406.47 | ~$200.81 |
| Locomotion System | ~R$2834.46 | ~€330.36 | ~$381.73 |
| **Total** | **~R$5840.04** | **~€1195.49** | **~$1647.12** |

---

## Structural Components

| Part | Amount | Unit Cost (BRL) | Buy (R$) | Unit Cost (EUR) | Buy (€) | Unit Cost (USD) | Buy ($) |
|------|:------:|:---------------:|:--------:|:---------------:|:-------:|:---------------:|:-------:|
| 40×40 T-Slot Aluminum Extrusion 600 mm | 2 | ~R$75.60 | [Forseti](https://loja.forsetisolucoes.com.br/perfil-estrutural-em-aluminio-40x40-basico-canal-8-t-slot-tslot) | ~€8.58 | [Motedis](https://www.motedis.com/en/Profile-40x40L-I-Type-slot-8) | ~$33.60 | [McMASTER-CARR](https://www.mcmaster.com/products/aluminum-extrusions/rail-height~40-mm/t-slotted-framing-rails-4/) |
| 40×40 T-Slot Aluminum Extrusion 300 mm | 8 | ~R$37.80 | [Forseti](https://loja.forsetisolucoes.com.br/perfil-estrutural-em-aluminio-40x40-basico-canal-8-t-slot-tslot) | ~€4.29 | [Motedis](https://www.motedis.com/en/Profile-40x40L-I-Type-slot-8) | ~$16.80 | [McMASTER-CARR](https://www.mcmaster.com/products/aluminum-extrusions/rail-height~40-mm/t-slotted-framing-rails-4/) |
| 40×40 T-Slot Aluminum Extrusion 220 mm | 15 | ~R$27.72 | [Forseti](https://loja.forsetisolucoes.com.br/perfil-estrutural-em-aluminio-40x40-basico-canal-8-t-slot-tslot) | ~€3.37 | [Motedis](https://www.motedis.com/en/Profile-40x40L-I-Type-slot-8) | ~$12.32 | [McMASTER-CARR](https://www.mcmaster.com/products/aluminum-extrusions/rail-height~40-mm/t-slotted-framing-rails-4/) |
| 40×40 T-Slot Aluminum Extrusion 180 mm | 4 | ~R$22.68 | [Forseti](https://loja.forsetisolucoes.com.br/perfil-estrutural-em-aluminio-40x40-basico-canal-8-t-slot-tslot) | ~€2.76 | [Motedis](https://www.motedis.com/en/Profile-40x40L-I-Type-slot-8) | ~$10.08 | [McMASTER-CARR](https://www.mcmaster.com/products/aluminum-extrusions/rail-height~40-mm/t-slotted-framing-rails-4/) |
| 40×40 T-Slot Aluminum Extrusion 75 mm | 2 | ~R$10.08 | [Forseti](https://loja.forsetisolucoes.com.br/perfil-estrutural-em-aluminio-40x40-basico-canal-8-t-slot-tslot) | ~€1.15 | [Motedis](https://www.motedis.com/en/Profile-40x40L-I-Type-slot-8) | ~$4.20 | [McMASTER-CARR](https://www.mcmaster.com/products/aluminum-extrusions/rail-height~40-mm/t-slotted-framing-rails-4/) |
| L-Bracket | 38 | ~R$4.77 | [Forseti](https://loja.forsetisolucoes.com.br/cantoneira-38x38x28mm-em-aluminio-p-perfis-base-30-40-45-50-t-slot-tslot) | ~€1.10 | [Motedis](https://www.motedis.com/en/Bracket-Alu-anodized-40x40) | ~$5.14 | [80/20](https://8020.net/40-4302.html) |
| Profile End Cap | 18 | ~R$2.47 | [Forseti](https://loja.forsetisolucoes.com.br/capa-de-fechamento-frontal-quadrada-preta-para-perfil-estrutural-em-aluminio) | ~€0.47 | [Motedis](https://www.motedis.com/en/Cover-Caps-40x40-I-Type-Slot-8) | ~$0.76 | [Motedis-USA](https://www.motedis-usa.com/en/Cover-Caps-40x40-I-Type-Slot-8) |
| Square Connector Plate 40×40 | 3 | ~R$10.95 | [Forseti](https://loja.forsetisolucoes.com.br/placa-de-conexao-montagem-lateral-quadrada-para-perfil-estrutural-em-aluminio) | ~€2.57 | [Motedis](https://www.motedis.com/en/Square-connector-plate-76x76x5-Lasercut) | ~$4.17 | [Motedis-USA](https://www.motedis-usa.com/en/Square-connector-plate-76x76x5-Lasercut) |
| L Connector Plate 40×40 | 2 | ~R$21.27 | [Forseti](https://loja.forsetisolucoes.com.br/placa-de-conexao-montagem-90-graus-com-corte-para-perfil-estrutural-em-aluminio) | ~€3.82 | [Motedis](https://www.motedis.com/en/-L-connector-plate-Alu-elox-4040) | ~$6.21 | [Motedis-USA](https://www.motedis-usa.com/en/-L-connector-plate-Alu-elox-4040?show_cart=1&from_cart=1&products_id=9999910079) |
| T Connector Plate 40×40 | 1 | ~R$13.15 | [Forseti](https://loja.forsetisolucoes.com.br/placa-de-conexao-montagem-t-para-perfil-estrutural-em-aluminio) | ~€4.49 | [Motedis](https://www.motedis.com/en/Connector-plate-T-Alu-elox-4040) | ~$7.29 | [Motedis-USA](https://www.motedis-usa.com/en/Connector-plate-T-Alu-elox-4040) |
| M6 x 12 mm Countersunk Allen Screw | 160 | ~R$0.86 | [Forseti](https://loja.forsetisolucoes.com.br/parafuso-allen-cabeca-conica-escareada-m6) | ~€0.34 | [Motedis](https://www.motedis.com/en/countersunk-screw-with-hexagon-socket-according-to-DIN-7991) | ~$0.63 | [80/20](https://8020.net/13-6712.html) |
| M6 x 20 mm Countersunk Allen Screw | 4 | ~R$0.86 | [Forseti](https://loja.forsetisolucoes.com.br/parafuso-allen-cabeca-conica-escareada-m6) | ~€0.33 | [Motedis](https://www.motedis.com/en/countersunk-screw-with-hexagon-socket-according-to-DIN-7991) | ~$0.85 | [80/20](https://8020.net/11-6720.html) |
| M4 x 20 mm Countersunk Allen Screw | 12 | ~R$0.32 | [Parafuso Fácil](https://www.parafusofacil.com.br/parafuso-allen/parafuso-allen-chato/din-7991-parafuso-allen-chato-ma-4-x-20-inox-304-a2-classe-70-passivado/) | ~€0.32 | [Motedis](https://www.motedis.com/en/countersunk-screw-with-hexagon-socket-according-to-DIN-7991) | ~$0.52 | [Motedis-USA](https://www.motedis-usa.com/en/countersunk-screw-with-hexagon-socket-according-to-DIN-7991) |
| M4 x 12 mm Countersunk Allen Screw | 18 | ~R$0.11| [Parafuso Fácil](https://www.parafusofacil.com.br/parafuso-allen/parafuso-allen-chato/din-7991-parafuso-allen-chato-ma-4-x-12-aco-liga-classe-10-9-enegrecido-de-tempera-1/) | ~€0.32 | [Motedis](https://www.motedis.com/en/countersunk-screw-with-hexagon-socket-according-to-DIN-7991) | ~$0.69 | [80/20](https://8020.net/11-4712.html) |
| M6 x 35 mm Motor Mount Screw | 16 | ~R$1.72 | [Forseti](https://loja.forsetisolucoes.com.br/parafuso-allen-cabeca-abaulada-panela-m6) | ~€0.39 | [Motedis](https://www.motedis.com/en/countersunk-screw-with-hexagon-socket-according-to-DIN-7991) | ~$0.63 | [Motedis-USA](https://www.motedis-usa.com/en/countersunk-screw-with-hexagon-socket-according-to-DIN-7991) |
| M6 T-Nut | 130 | ~R$2.08 | [Forseti](https://loja.forsetisolucoes.com.br/porca-t-martelo-para-perfil-estrututral-em-aluminio-canal-8-40-40x40-tslot-t-slot) | ~€0.50 | [Motedis](https://www.motedis.com/en/T-nut-B-type-slot-8-M6-stainless-steel) | ~$1.19 | [80/20](https://8020.net/13119.html) |
| M6 Hex Nut | 34 | ~R$0.57 | [Forseti](https://loja.forsetisolucoes.com.br/porca-sextavada-m3-m4-m5-m6-m8-m10-m12) | ~€0.30 | [Motedis](https://www.motedis.com/en/Nut-DIN-439-M4-M5-M6-M8-M10-and-M12) | ~$0.14 | [80/20](https://8020.net/3820.html) |
| M4 Hex Nut | 56 | ~R$0.57 | [Forseti](https://loja.forsetisolucoes.com.br/porca-sextavada-m3-m4-m5-m6-m8-m10-m12) | ~€0.30 | [Motedis](https://www.motedis.com/en/Nut-DIN-439-M4-M5-M6-M8-M10-and-M12) | ~$0.19 | [80/20](https://8020.net/11-4065.html) |
| Copper Sheet 30 × 20 cm | 2 | ~R$29.70 | [UsinaInfo](https://www.usinainfo.com.br/placa-de-fenolite/placa-de-fenolite-cobreada-simples-15x30-cm-para-circuito-impresso-3845.html) | ~€11.65 | [LinGold](https://lingold.pt/copper-sheet/copper-sheet-15-mm) | ~$5.20 | [MCTInfo](https://mctinfo.net/products/copper-clad-laminate-fr4) |
| Acrylic Sheet 1 m × 1.3 m | 1 | ~R$253.16 | [AcriLoja](https://www.acriloja.com/placa-chapa-acrilico/preto/2mm/placa-de-acrilico-preto-100cm-x-150cm-espessura-2mm-chapa-de-acrilico) | ~€86.33 | [Plastic Sheets Shop](https://plasticsheetsshop.co.uk/product/frosted-black-acrylic-sheet-3-mm/) | ~$74.80 | [ACPlasticsInc](https://www.acplasticsinc.com/products/2025-060-48x-72-trucast-p) |


---

## Electrical System

| Part | Amount | Unit Cost (BRL) | Buy (R$) | Unit Cost (EUR) | Buy (€) | Unit Cost (USD) | Buy ($) |
|------|:------:|:---------------:|:--------:|:---------------:|:-------:|:---------------:|:-------:|
| Hoverboard Battery (36V) | 4 | ~R$139.30 | [Arco Iris LED](https://www.arcoirisled.com.br/produto/bateria-original-para-hoverboard-eletrico-36v-44ah-ydtech) | ~€89.99 | [Decathlon](https://www.decathlon.ie/p/1100365324-2495102-36v-4ah-hoverboard-battery-replacement.html?utm_source=chatgpt.com) | ~$44.99 | [BatteryGC](https://batterygc.com/products/10s2p-36v-4-4ah-18650-li-ion-battery-for-hoverboard-scooter-balance-board-car) |
| Ferrule Terminals (Wire Ferrules) | 20 | ~R$14.69 | [Santil](https://www.santil.com.br/terminal-ilhos-pre-isolado-cinza-simples-4mm-com-100-pecas-eletrokit/p) | ~€0.086 | [Mouser](https://eu.mouser.com/ProductDetail/KS-Terminals/EN2508?qs=%252B6g0mu59x7IZJehitj7%252BJA%3D%3D) | ~$0.014 | [FerrulesDirect](https://www.ferrulesdirect.com/collections/insulated-wire-ferrules/products/ad15006) |
| 20A Switch | 3 | ~R$7.50 | [Casa do Resistor](https://www.casadoresistor.com.br/chave-kcd4-201-4t-16-20a-125-250v-preta) | ~€5.6 | [Hestore](https://www.hestore.eu/prod_10040377.html#) | ~$3.15 | [McMASTRER-CARR](https://www.mcmaster.com/products/7395k111/) |
| Emergency Stop Button (Mushroom Type) | 1 | ~R$28.90 | [OnEletrica](https://www.oneletrica.com.br/botao-emergencia-22mm-gira-destrava-com-2-contatos-nf) | ~€27.99 | [Conrad](https://www.conrad.com/en/p/schneider-electric-xb5as8442-kill-switch-epo-switch-front-ring-steel-kill-switch-round-reset-function-lockable-1-1983552.html) | ~$11.12 | [RS](https://us.rs-online.com/product/altech-corp/2am4/70156810/) |

```{important}
Use a 2 mm² flexible cable (approximately AWG 14) for power distribution.
```


---

## Locomotion System

| Part | Amount | Unit Cost (BRL) | Buy (R$) | Unit Cost (EUR) | Buy (€) | Unit Cost (USD) | Buy ($) |
|------|:------:|:---------------:|:--------:|:---------------:|:-------:|:---------------:|:-------:|
| NEMA 23 Stepper Motor (30 kgf·cm) | 4 | ~R$215.00 | [Tecmaf](https://loja.tecmaf.com.br/motores-de-passo-e-componentes-cnc/motor-de-passo/motor-de-passo-nema-23-30kgf-cm-749) | ~€21.24 | [Cloudray](https://www.cloudraylaser.com/products/cloudray-102mm-3n-m-5a-2-phase-nema23-open-loop-stepper-motor) | ~$28.70 | [StepperOnline](https://www.omc-stepperonline.com/nema-23-bipolar-3nm-425oz-in-8mm-diameter-4-2a-57x57x113mm-4-wires-stepper-motor-23hs45-4204s1) |
| TB6600 Stepper Driver | 4 | ~R$79.90 | [RoboCore](https://www.robocore.net/driver-motor/driver-para-motor-de-passo-tb6600) | ~€11.95 | [Otronic](https://www.otronic.nl/en/tb6600-stepper-motor-driver-for-nema-17-23-34-9-42.html) | ~$20.00 | [DFRobot](https://www.dfrobot.com/product-1547.html) |
| MPU-9250 IMU with BMP280 (6-pin) | 2 | ~R$127.43 | [Elecbee](https://www.elecbee.com/en/product-detail/mpu9250-bmp280-10dof-gy-91-acceleration-gyroscope-compass-nine-shaft-sensor-module_25515) | ~€22.89 | [Elecbee](https://www.elecbee.com/en/product-detail/mpu9250-bmp280-10dof-gy-91-acceleration-gyroscope-compass-nine-shaft-sensor-module_25515) | ~$23.38 | [Elecbee](https://www.elecbee.com/en/product-detail/mpu9250-bmp280-10dof-gy-91-acceleration-gyroscope-compass-nine-shaft-sensor-module_25515) |
| 100mm Mecanum Wheel | 1 | ~R$1400.00 | [CelUsinagem](https://celusinagem.wixsite.com/omni-mecanum) | ~€151.82 | [RobotShop](https://eu.robotshop.com/products/100mm-mecanum-wheel-set) | ~$140.17 | [RobotShop](https://www.robotshop.com/products/100mm-mecanum-wheel-set) |

```{note}
We opted to manufacture the wheels through a local supplier, as this proved to be significantly more cost-effective than purchasing them online. For reference, links to similar wheels available on the market are provided above.
```

---

## 3D Printed Parts

The following table lists all required 3D printed components.

| Module | Part | Quantity | STL Link |
|--------|:----:|:--------:|:--------:|
| Structural | Door Handle| 1 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/structural/door_handle.stl) |
| Structural | Door Handle Magnet | 1 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/structural/door_handle_magnet.stl) |
| Structural | Side Acrylic Magnet | 6 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/structural/side_acrylic_magnet.stl) |
| Structural | Side Acrylic Magnet Mount | 6 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/structural/side_acrylic_magnet_mount.stl) |
| Battery | Battery Case Lower | 4 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/battery/battery_case_female_socket_mount.stl) |
| Battery | Battery Case Upper | 4 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/battery/battery_case_lower.stl) |
| Battery | Battery Case Female Socket Mount | 4 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/battery/battery_case_upper.stl) |
| Battery | Battery Hotswap Connector | 2 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/battery/battery_hotswap_connector.stl) |
| Battery | Battery Hotswap Male Connector | 4 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/battery/battery_hotswap_male_connector.stl) |
| Drivers | Arduino Board Mount | 1 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/drivers/arduino_PCB_support.stl) |
| Drivers | Driver Board Left Mount | 1 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/drivers/driver_PCB_left_support.stl) |
| Drivers | Driver Board Right Mount | 1 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/drivers/driver_PCB_right_support.stl) |
| Drivers | PCB's Support | 1 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/drivers/PCBs_support.stl) |
| Drivers | Drivers Mount | 4 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/drivers/drivers_support.stl) |
| Motors | Front Motor Mount | 2 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/motors/front_motor_mount.stl) |
| Motors | Rear Motor Mount Left | 1 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/motors/rear_motor_mount_left.stl) |
| Motors | Rear Motor Mount Right | 1 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/motors/rear_motor_mount_right.stl) |
| Emergency | Emergency Stop Button Mount | 1 | [STL](https://github.com/fbot-research/open_micky/blob/main/hardware/emergency_button/emergency_button.stl) |

</div>