

Gps watch
Code and design files for the Landhopper GPS watch
- Size
- 99 × 59 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 90
- Nets
- 76
- Pads
- 302
- Tracks, vias
- 479, 104
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 8 Feb 2024
- Updated
- 4 May 2024
Overview
Gps watch is an open-source printed circuit board by SuperTails, from the SuperTails/gps-watch repository on GitHub, published under the Apache-2.0 licence. It is a 4-layer board of 99 × 59 mm with 90 parts on 76 nets, routed with 479 tracks and 104 vias.
It is built around the 74AHC1G04SE, MAX-M10S and S-1317A33-M5T1U4, with the PMEG4005EH and SI2319CDS among its other parts. Its parts include 19 capacitors, 12 resistors, 11 connectors, 7 ICs and 7 diodes. It belongs with the radio and wireless and wearables boards and the STM32 boards of this library.
Main components
574AHC1G04SE
SOT-353-40℃~+125℃ 1 1 1.5V~3.85V 1.9V、2.9V、4.4V 1uA 2V~5.5V 500mV~1.65V 7.5ns@5V,50pF 74AHC 8mA 8mA Noise suppression function Schmitt trigger SOT-353 Inverters ROHSDiodes IncorporatedInvertersMAX-M10S
LCC-18_10.1X9.7LCC-18_10.1X9.7 New Arrivals ROHSu-bloxUncategorisedS-1317A33-M5T1U4
SOT-23-5-40℃~+85℃ 3V 5.5V Fixed Over Current Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSABLICVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsPMEG4005EH
SOD-1231 Independent 100uA@40V 10A 40V 470mV@500mA 500mA SOD-123 Schottky Diodes ROHSNexperiaSchottky DiodesSI2319CDS
SOT-23-55℃~+150℃ 1 P-Channel 108mΩ@4.5V 2.5V 2.5W 21nC@10V 4.4A 40V 595pF 61pF 76pF P-Channel SOT-23 MOSFETs ROHSVishay IntertechnologyMOSFETs
README
README.mdGPS Watch "Landhopper": Firmware
Carnegie Mellon University
18-500 ECE Design Experience, Spring 2024
Gary Bailey, Carson Swoveland, Twain Byrnes
To build, make sure the thumbv7em-none-eabihf target is installed. Deploy with
cargo run to use probe-rs, or use openocd -f openocd.cfg and gdb-multiarch -x gdb.cfg
to enter a debugger.
Parts
90| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | TestPoint | TestPoint:TestPoint_Loop_D3.80mm_Drill2.5mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11, TP12 |
| 10 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C4, C5, C13, C14, C16, C17, C18, C19 |
| 6 | PMEG4005EH | Diode_SMD:D_SOD-123F | D1, D2, D3, D4, D5, D6 |
| 5 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C6, C7, C8, C15 |
| 4 | 1M | Potentiometer:POT_PV36W_MUR | RV1, RV2, RV3, RV4 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R2, R13 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric | R8, R9 |
| 2 | 1M | Resistor_SMD:R_0805_2012Metric | R14, R15 |
| 2 | 4.3pF | Capacitor_SMD:C_0805_2012Metric | C10, C11 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric | R10, R11 |
| 2 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2, J8 |
| 2 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J6, J11 |
| 2 | Jumper_2_Bridged | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP2, JP3 |
| 1 | 10nF | Capacitor_SMD:C_0603_1608Metric | C12 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C9 |
| 1 | 1R | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 22u | inductor_wurth:IND_4818-WE-TPC_WRE | L1 |
| 1 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | 33k | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | 74AHC1G04 | Package_TO_SOT_SMD:SOT-23-5 | U6 |
| 1 | 82k | Resistor_SMD:R_0805_2012Metric | R4 |
| 1 | ADP5090ACP | Package_CSP:LFCSP-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm | U3 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_15x7.5RM7.6 | BZ1 |
| 1 | Conn_01x02_Pin | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J4 |
| 1 | Conn_01x03_Pin | Connector_Molex:Molex_PicoBlade_53047-0310_1x03_P1.25mm_Vertical | J1 |
| 1 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J5 |
| 1 | Conn_01x10 | panasonic:ayf531035 | J9 |
| 1 | Conn_Coaxial | Connector_Coaxial:U.FL_Hirose_U.FL-R-SMT-1_Vertical | J7 |
| 1 | Crystal | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | D_Zener | Diode_SMD:D_0402_1005Metric | D7 |
| 1 | Jumper_2_Open | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1 |
| 1 | LOGO | careers:bnyahaj | G*** |
| 1 | LOGO | careers:salix | G*** |
| 1 | LOGO | careers:sky | G*** |
| 1 | MAX-M10S | RF_GPS:ublox_MAX | U5 |
| 1 | MCP6401T-xOT | Package_TO_SOT_SMD:SOT-23-5 | U7 |
| 1 | MCP73831-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | MEM2061-01-188-00-A_REVA | MEM2061_01_188_00_A:GCT_MEM2061-01-188-00-A_REVA | J12 |
| 1 | R_US | Resistor_SMD:R_0805_2012Metric | R5 |
| 1 | S-1317A33-M5T1U4 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | STM32L412KBTx | Package_QFP:LQFP-32_7x7mm_P0.8mm | U4 |
| 1 | SW_5Way_Tactile | sw_tactile:SW_5Way_Tactile | SW3 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | SW_SPDT | Button_Switch_THT:SW_Slide_1P2T_CK_OS102011MS2Q | SW2 |
| 1 | Si2319CDS | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J3 |
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Questions
How big is the Gps watch PCB?
It measures 99 × 59 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Gps watch use?
90 parts, built around the 74AHC1G04SE, MAX-M10S, S-1317A33-M5T1U4 and PMEG4005EH. 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 Gps watch KiCad files?
From the SuperTails/gps-watch repository on GitHub, at the commit this page was made from: the board is pcb/prototype/gps_watch.kicad_pcb and its schematic pcb/final/gps_watch.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Gps watch design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).