| Designator | Component | Number | Cost per unit -USD |
Total cost-USD |
Source of materials |
Material type |
|---|---|---|---|---|---|---|
| GAIN1, GAIN2 | Resistor SMD 49.9 ohms | 2 | 0.10 | 0.20 | Mouser | Non-specific |
| R3 | Resistor SMD 100 ohms | 1 | 0.10 | 0.10 | Mouser | Non-specific |
| R1, R2, RLED, R5 | Resistor SMD 220 ohms | 4 | 0.10 | 0.40 | Mouser | Non-specific |
| R1_1, R2_1 | Resistor SMD 374 ohms | 2 | 0.80 | 1.60 | Mouser | Non-specific |
| RG1, RG2, RF1, RF2 | Resistor SMD 1 K ohms | 4 | 0.30 | 1.20 | Mouser | Non-specific |
| R1_2, R2_2 | Resistor SMD 10.4 K ohms | 2 | 0.94 | 1.88 | Mouser | Non-specific |
| R4 | Resistor SMD 5 M ohms | 1 | 1.61 | 1.61 | Mouser | Non-specific |
| DISPLAY | Trimmer Resistor SMD 10 K ohms | 1 | 2.08 | 2.08 | Mouser | Non-specific |
| TRANS_IMP_AMP, OP_REF, OP_FILTER | Op Amp Dual Rail-to-Rail | 3 | 0.87 | 2.61 | Mouser | Non-specific |
| LEDON | Green LED SMD | 1 | 0.37 | 0.37 | Mouser | Non-specific |
| AD8426 | Instrumentation Amplifier | 1 | 5.75 | 5.75 | Mouser | Non-specific |
| STRAIN1, STRAIN2 | 4P Fixed Terminal Blocks | 2 | 3.02 | 6.04 | Mouser | Non-specific |
| INDICATOR, IR_LED, DETECTOR | 2P Fixed Terminal Blocks | 3 | 1.51 | 4.53 | Mouser | Non-specific |
| C1_2, C2_2 | Capacitor SMD 0.02uF | 2 | 0.36 | 0.72 | Mouser | Ceramic |
| C1_1, C2_1 | Capacitor SMD 0.2uF | 2 | 0.51 | 1.02 | Mouser | Ceramic |
| LCD | 2 × 8 Male Pin Header | 2 | 0.69 | 1.38 | Jameco | Non-specific |
| ARD_10 | 1 × 10 Arduino Pin Header | 1 | 0.79 | 0.79 | Jameco | Non-specific |
| ARD_8 | 1 × 8 Arduino Pin Header | 2 | 0.59 | 1.18 | Jameco | Non-specific |
| ARD_6 | 1 × 6 Arduino Pin Header | 1 | 0.55 | 0.55 | Jameco | Non-specific |
| LC | Load Cell 0.6 kg | 2 | 51.28 | 102.56 | Sensor Techniques Ltd | Metal |
| GLED | Green LED | 1 | 1.26 | 1.26 | Mouser | Non-specific |
| RLED | Red LED | 1 | 1.67 | 1.67 | Mouser | Non-specific |
| LCD_DISP | LCD Display | 1 | 11.10 | 11.10 | Mouser | Non-specific |
| PD | IR Photodiode | 1 | 0.72 | 0.72 | Mouser | Non-specific |
| IR | IR LED | 1 | 0.05 | 0.05 | Chanzon | Non-specific |
| MS_1 | 6–32 1/2″ MACHINE SCREW PAN PHILLIPS | 4 | 0.0773 | 0.31 | Digikey | Metal |
| MS_2 | 6–32 5/16″ MACHINE SCREW PAN PHILLIPS | 8 | 0.0306 | 0.24 | Digikey | Metal |
| HS_1 | 6–32 1–3/4″ HEX STANDOFF | 4 | 1.28 | 5.12 | Digikey | Metal |
| HS_2 | 6–32 3/8″ HEX STANDOFF | 4 | 0.57 | 2.28 | Digikey | Metal |
| MS_3 | M3 MACHINE SCREW PAN PHILLIPS | 4 | 0.63 | 2.52 | Digikey | Metal |
| HS_3 | M2.5 HEX STANDOFF ALUMINUM 10MM | 4 | 0.54 | 2.16 | Digikey | Metal |
| HN_1 | M2.5 HEX NUT 0.197″ STEEL | 4 | 0.15 | 0.60 | Digikey | Metal |
| MS_4 | M2.5 MACHINE SCREW PAN SLOTTED | 4 | 0.38 | 1.52 | Digikey | Metal |
| BOX | BOX ALUM BLK/WHT 10″L X 11.93″W | 1 | 64.40 | 64.40 | Digikey | Metal |
| MS_5 | M3 35 mm Machine Screw Phillips | 4 | 0.15 | 0.60 | uxcell | Metal |
| INSERT | 6–32 Brass Heat-Set Insert Thermoplastic | 12 | 0.1538 | 1.85 | McMASTER-CARR | Metal |
| FLEXARM | Threaded Fitting Arm | 2 | 21.80 | 43.6 | Moffatt | Non-specific |
| CABLE | 8×2 Flat Ribbon Cable | 1 | 2.53 | 2.53 | Amazon | Non-specific |
| ARDUINO | Elegoo UNO R3 (Arduino clone) | 1 | 10.90 | 10.90 | Amazon | Non-specific |
| BOARD | Custom PCB | 1 | 9.45 | 9.45 | OSH Park | Non-specific |
| Custom routing and engraving of BOX | 1 | 75.00 | 75.00 | Routed-4-U LLC. | Metal | |
| Custom Acrylic Components | 1 | 350.00 | 350.00 | Routed-4-U LLC. | Polymer |
Note: Custom fabricated components, such as the PCB, enclosure routing/engraving, and acrylic pieces, are subject to different rates depending on preference and availability of manufacturers. The Custom Acrylic Components listing includes the following individual pieces (see Design Files section): Plastic Base, Right Footpad, Left Footpad, 2 × LC Attachment Blocks, LC Mounting Platform, Lid, Outer Container, Top Frame, Water Bottle Insert. With access to an applicable 3D printer, many of these acrylic pieces can be 3D printed for a further reduction in cost.