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2 layers47.4 × 39.8 mmGPSPCB, the printed circuit board in 3D

GPS PCB, schematics, code, expenses.

Size
47.4 × 39.8 mm
Copper layers
2
Thickness
1.6 mm
Parts
69
Nets
106
Pads
342
Tracks, vias
836, 138
Routed
Yes
KiCad
KiCad 7 (file 20221018)
Created
4 Jul 2023
Updated
5 Aug 2023

Overview

GPSPCB is an open-source printed circuit board by ThomasHODonnell, from the ThomasHODonnell/GPSPCB repository on GitHub. It is a 2-layer board of 47.4 × 39.8 mm with 69 parts on 106 nets, routed with 836 tracks and 138 vias.

It is built around the PE4259-63, SKY65404-31 and STA8090FG, with the SX1268IMLTRT, 74LVC2G00GT and BQ24092DGQT among its other parts. Its parts include 25 capacitors, 16 resistors, 9 ICs, 8 inductors and 1 diode.

Main components

8

README

README.md

GPS PCB - designing a consumer electronic from start to finish

Concepts

  • My father run a bicycle shop. Some of his customers' bicycles have been stolen. He asked me if I could design a product to help combat this problem. This problem led me to a GPS based solution - to get things started.
  • The solution provided here is an embedded system that can transmit its location upon request utilizing a satallite HTTP request API.
  • This product combats the problem by not only locating a stolen / lost bicycle, but my locating a potential thief. Therefore, this product can act as a form of location verification for law enforcement bodies in pursuit of any item this PCB is attached to.

Logistics

  • I have designed 3D printed CAD models to safely secure this system on a moving bicycle. This system comfortably holds the PCB, its components and a battery.
  • While I have not completed suffient testing to determine the battery life of this system, its power consumption is very low for a reasonably sized battery and its capacity. This combination should ensure that the device does not need to be recharged for a reasonable amount of time.

Technical Information

  • This initial design is intended to be minimalistic. I have foregone a Microcontroller Unit in an effort to minimize power consumption, size, and cost. Alternativly, I have implemented a standalone Reciever / Transciever combination to complete the necessary funcitonality without any additional computing.
  • Of course, there are a number of other ICs to accompany these functional components, such as LDO Regulators, Operational Amplifiers, Logic Gates, Switches, Battery IC, Low Noise Amplifier, and Antennas.
  • While this Electronic Circuit requires significantly more testing, the technical aspectrs of this solution offer a helpful initial solution to a logicically challenging problem.

Disclaimer

  • I am a third-year Computer Engineering Student. In no fashion am I qualified to develop professional grade products at this point in my career.
  • Therefore, I would not recommend using any of my design choices for other applications without inquiring a professional.
  • I will post other README files within other folders with other information, screenshots, and files.

Parts

69
QtyValueFootprintReferences
8470nFCapacitor_Tantalum_SMD:CP_EIA-1608-08_AVX-JC13, C14, C19, C20, C21, C23, C25, C26
7100nFCapacitor_Tantalum_SMD:CP_EIA-1608-08_AVX-JC12, C16, C17, C18, C22, C24, Ce
51uHInductor_THT:L_Axial_L5.3mm_D2.2mm_P7.62mm_Horizontal_Vishay_IM-1L2, L5, L7, L8, Le
4100RResistor_SMD:R_0201_0603MetricR1, R1, R3, R12
41uFCapacitor_Tantalum_SMD:CP_EIA-1608-08_AVX-JC6, C7, C11, C15
4MountingHoleMountingHole:MountingHole_2.7mm_M2.5_Pad_TopOnlyH1, H2, H3, H4
3100kResistor_SMD:R_0201_0603MetricR9, R11, R15
215uHInductor_THT:L_Axial_L5.3mm_D2.2mm_P7.62mm_Horizontal_Vishay_IM-1L3, L4
221pFCapacitor_Tantalum_SMD:CP_EIA-1608-08_AVX-JC4, C5
25kRResistor_SMD:R_0201_0603MetricR2, R8
2TL081HIDBVRKiCadOP:SOT95P280X145-5NIC2, IC5
10.1uFCapacitor_Tantalum_SMD:CP_EIA-1608-08_AVX-JC8
10.5pFCapacitor_Tantalum_SMD:CP_EIA-1608-08_AVX-JC9
10.6nHInductor_THT:L_Axial_L5.3mm_D2.2mm_P7.62mm_Horizontal_Vishay_IM-1L1
1100kRResistor_SMD:R_0201_0603MetricR14
11575AT43A0040EKiCadANT:1575AT43A0040EANT1
11kResistor_SMD:R_0201_0603MetricR4
11k5Resistor_SMD:R_0201_0603MetricR7
11nFCapacitor_Tantalum_SMD:CP_EIA-1608-08_AVX-JC27
12kResistor_SMD:R_0201_0603MetricR5
132CrystalKiCad32MOSC:FC12M327680KDA0Y2
14.7uFCapacitor_Tantalum_SMD:CP_EIA-1608-08_AVX-JC10
1470kResistor_SMD:R_0201_0603MetricR16
1470kRResistor_SMD:R_0201_0603MetricR10
150kRResistor_SMD:R_0201_0603MetricR6
174LVC2G00GTKiCad:74AVC9112GTXIC6
1A10340KiCadTANT:A10340ANT2
1BATT+TestPoint:TestPoint_Pad_2.0x2.0mmTP1
1BATT-TestPoint:TestPoint_Pad_2.0x2.0mmTP2
1BQ24092DGQTKiCadBatt:DGQ0010D_NV_NU4
1LDO1.8Package_TO_SOT_SMD:SOT-223-3_TabPin2U3
1PE4259KiCadRFSwitch:SOT65P210X110-6NIC4
1REDLED_THT:LED_D3.0mmD2
1SKY65404RF:Skyworks_SKY65404-31U2
1STA8090FGKiCadGPS:BGA99C50P9X11_500X600X120IC1
1SX1268IMLTRTKiCadTransIC:QFN50P400X400X100-25N-DIC3
1USBDX07S016JA1R1500:JAE_DX07S016JA1R1500J1

Questions

How big is the GPSPCB PCB?

It measures 47.4 × 39.8 mm and has 2 copper layers, 1.6 mm thick.

What parts does the GPSPCB use?

69 parts, built around the PE4259-63, SKY65404-31, STA8090FG and SX1268IMLTRT. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the GPSPCB KiCad files?

From the ThomasHODonnell/GPSPCB repository on GitHub, at the commit this page was made from: the board is GPSPCB.kicad_pcb and its schematic KICAD/GPSPCB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the GPSPCB design in my own project?

Its repository states no licence, so its author keeps all rights: ask ThomasHODonnell before reusing the design.

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