digitaldanny
commented
3 years ago The components used for both PCBs are included in the BOMs below. I did not list the capacitors and resistors because there are so many different values that would just clutter the document. All of these values are standard and could be found in a cheap set of 1% tolerance resistor and electrolytic/ceramic capacitor kits.
Glove PCB BOM
| Ref Designator | Qty | Manufacturer | Mfg Part # | Description | PPU ($) |
|---|---|---|---|---|---|
| N/A | 3 | Adafruit | ADA1070 | Flex Sensor | 10.95 |
| U1 | 1 | Texas Instruments | CD4051BE | 8:1 Analog Demux/Mux | 0.65 |
| J1 | 1 | Texas Instruments | LM324N | Single Supply Op-Amp | 0.65 |
| L1 | 1 | KEMET | L0805C4R7MDMIT | 4u7 Inductor | 0.45 |
| HFX1 | 1 | 9B-48.000MBBK-B | XTAL | 48 MHz Crystal | 0.30 |
| HC1 | 1 | HiLetgo | HC-05 | HC-05 Serial to Bluetooth Module | 7.99 |
| U2 | 1 | Texas Instruments | MSP432P401RIPZR | Microcontroller | 9.26 |
| N/A | 1 | Crystal Fontz | CFAL6448A | 48x64 OLED | 5.11 |
| ZIF1 | 1 | Crystal Fontz | CS050Z12G-A0 | 12-pin 0.50 mm pitch, FPC FCC ZIF Adapter | 0.61 |
| IMU1 | 1 | Adafruit | MPU6050 | I2C Accelerometer & Gyroscope | 6.99 |
| U5 | 1 | Texas Instruments | TPS63020DSJT | Buck/Boost Converter | 3.13 |
| BAT1 | 1 | Jauch Quartz | LP443441JU | 3.7V Single Cell Li-Po Battery | 11.45 |
| L2 | 1 | Abracon LLC | AIML-0805HC-1R5M-T | 1u5 H inductor | 0.26 |
| Q1 | 1 | Infineon Technologies | IPP80P03P4L | High-Power PCh MOSFET | 2.46 |
Total Build Price: $82.16
Charger PCB BOM
| Ref Designator | Qty | Manufacturer | Mfg Part # | Description | PPU ($) |
|---|---|---|---|---|---|
| U1 | 1 | National Semiconductor | LM1117T-5.0 | 5V Linear Regulator | 0.57 |
| PWR2.5 | 1 | CUI Devices | PJ-059B | 2.5x5.5 mm Power Adapter | 0.78 |
| Q1, Q2, Q3, Q4 | 4 | ON Semiconductor | 2N7000 | NCh 200 mA MOSFET | 0.09 |
| J1 | 1 | Texas Instruments | LM324N | Single Supply Op-Amp | 0.65 |
| D1, D2, D3, D4 | 4 | NTE Electronics, Inc | 1N4148 | General Purpose Diode | 0.04 |
| U7 | 1 | ON Semiconductor | LM317T | Adjustable Linear Regulator | 0.60 |
| Q5, Q7 | 2 | ON Semiconductor | PN2222 | NPN 200 mA BJT | 0.41 |
| Q6 | 1 | ON Semiconductor | PN2907A | PNP 200 mA BJT | 0.43 |
| U3, U2, U10 | 3 | Texas Instruments | NE555P | Timer | 0.09 |
| U5 | 1 | Texas Instruments | CD4029BE | Up/Down Binary Counter | 0.60 |
| U4 | 1 | Texas Instruments | CD4051BE | 8:1 Analog Demux/Mux | 0.65 |
| U6 | 1 | Texas Instruments | SN74HC00N | 4 unit NAND gate | 0.44 |
| U1 | 1 | Analog Devices, Inc | AD8226ARZ | Single Supply Instrumental Amplifier | 3.20 |
| U8 | 1 | Texas Instruments | SN74HC74N | 2 unit DFF | 0.44 |
| Speaker1 | 1 | PUI Audio, Inc | ASE03008MR-LW150-R | Speaker 8Ohm 1W | 4.39 |
Total Build Price: $13.38
Describe the solution you'd like The Bill of Materials, BOM is a critical part of your design because is specifies all the components, their quantity and their cost that are going into your design. It can be built on an Excel spread sheet. If you give someone your schematics, your board designs and your final bill of materials they should be able buy parts, have boards fabricated and recreate your senior design prototype. Companies consider their schematics, board designs and BOMs proprietary information and rarely let someone outside the organization see them.
The powerful thing about completing the BOM is that it makes you do research and decide on specific parts, find vendors, look at lead times and availability and find costs and shipping costs. Then you need to organize all this information for you project prototype. I can spend an full day or more doing parts research, getting all this information together, making parts decisions with the latest prices and confirming vendor inventories when I do a project.
For the PDR deliverable and for managing your Senior Design project it is better to include the major parts of your project as separate rows on the BOM and have an extra row called Misc which includes inexpensive hardware, surface mount caps and resistors, screws, wires, connectors etc.
Here are some links for example BOM discussions and BOMs
https://www.pcbway.com/blog/PCB_Assembly/How_to_Build_a_BOM__Bill_Of_Materials_.html https://www.eeweb.com/how-to-build-a-pcb-the-bill-of-materials-bom/