Week 16
System integration
Countdown to Final Project presentation
Week assignment Individual assignment:
- Design and document the system integration for your final project.
Weekly Task Development
I am documenting all the development of this system integration tasks in the
Project Development Week 15-16 section.
Tasks Completed:
Design and fabrication of the central PCB
and the PCBs that will be placed under each seat on which I will place an HX711 ADC
- Design and fabrication of the frame that will house the LEDs.
I still need to define the outer case that will integrate the power supply and the main PCB.
- Design and printing of 544 caps for each cell. (wip) 17 rows by 34 columns.
I prepared a grasshopper strategy defining the parameters of layer size and number of perimeters to adapt the geometry to the characteristics of the model as much as possible.
And I set the printers to print
- Modeling of the seat.
Pending Tasks:
- Design the enclosures that will house the PCBs. wip
- Design the case where the load cells will be placed. wip
Basic diagram of the routing of the wires to be milled in the board. wip
You can check the progress of all the work I am doing at the following link:
Link to Project Development Week 15-16
BOM
Hardware
Items | units | description | € | total € |
---|---|---|---|---|
Load cell | 9 | 4x50 kg Load Cell 50kg Weighing Sensor Half-bridge Strain Gauge Human Body Scale Weight Sensor + mounting bracket | 4,59 € | 41,31 € |
LEDs | 14 | 50 Uds DC 5V WS2811 | 11,49 € | 160,86 € |
Power Supply | 1 | LPV-100-5V 12A 230x70x40 mm | 32,62 € | 32,62 € |
Lever quick connector | 20 | 1x2 32A | 0,44 € | 8,80 € |
Bicolor Parallel cable OFC TASKER | 2 m. | 2 x 2,5 mm | 2,42 € | 4,84 € |
Colored heat shrink tube | 2 | BPC0018 1,22 m d4,8 mm | 1,97 € | 3,94 € |
Frame MDF 5 mm | 1 | 1210 x 1010 | 27,52€ | 27,52€ |
2 | 1000 x 800 | 22,11€ | 44,22€ | |
Support | 2 | 1000 x 800 | wip | |
Beam | 1 | 4000 x 140 x 90 | ||
Board under seats | 1 | 4000 x 500 x 30 | wip | |
Seat | 9 | 400 x 300 | wip |
Electronics
PCB load cell | Quantity |
---|---|
PinHeader_01x04_P2.54mm_Horizontal_SMD | 9 |
PinHeader_02x03_P2.54mm_Vertical_SMD | 9 |
HX711 | 9 |
PCB control load cell | Quantity |
---|---|
R_1206 0 Ohm | 1 |
XIAO-ESP32C3 | 1 |
PinHeader_02x03_P2.54mm_Vertical_SMD | 3 |
PCB control LEDs | Quantity |
---|---|
XIAO-ESP32C3 | 1 |
SCHOTTKY 100V 1A SOD-123 | 1 |
PinHeader_01x03_P2.54mm_H_SMD | 1 |
Input GND SM99S01VBNN05G7 Data Sheet | 1 |
Input 5V SM99S01VBNN05G7 Data Sheet | 1 |
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