

Lathrum thesis
Undergraduate Honors thesis for graduation in 2022
- Size
- 158.3 × 110 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 80
- Nets
- 232
- Pads
- 595
- Tracks, vias
- 1,460, 216
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 5 (file 20210424)
- Created
- 7 Sep 2022
- Updated
- 1 Oct 2022
Overview
Lathrum thesis is an open-source printed circuit board by Dylancyclone, from the Dylancyclone/thesis repository on GitHub. It is a 2-layer board of 158.3 × 110 mm with 80 parts on 232 nets, routed with 1,460 tracks and 216 vias.
It is built around the 74LVC1G07, MCP73871-2CCI/ML and RT9742ENGJ5, with the RT9742VGJ5, USB2504A-JT and SS-52100-001 among its other parts. Its parts include 25 resistors, 23 capacitors, 10 connectors, 9 ICs and 6 diodes. It belongs with the Raspberry Pi (Linux) boards of this library.
Main components
1074LVC1G07
SOT-353-40℃~+105℃ 1 1 1.65V~5.5V 1.6ns@5.5V,50pF 24mA 4uA 74LVC Open-drain Power-off isolation、Level shifting Unidirectional SOT-353 Buffers, Drivers, Receivers, Transceivers ROHSWuxi I-core ElecBuffers, Drivers, Receivers, TransceiversMCP73871-2CCI/ML
QFN-20(4x4)-40℃~+85℃ 1 1.1A 28uA 4.1V~6V 4.2V Charging IC Support Support QFN-20(4x4) Battery Management ROHSMicrochip TechnologyBattery ManagementRT9742ENGJ5
TSOT-23-5TSOT-23-5 Power Distribution Switches ROHSRichtek TechPower Distribution SwitchesRT9742VGJ5
TSOT-23-5-40℃~+85℃ 1 2.7V~6V 70mΩ TSOT-23-5 Power Distribution Switches ROHSRichtek TechPower Distribution SwitchesUSB2504A-JT
LQFP-64(10x10)0℃~+70℃ 1.8V、3.3V 480Mbps Hub USB 2.0 LQFP-64(10x10) USB HUB Controllers ROHSMicrochip TechnologyUSB HUB ControllersSS-52100-001
插件1 4P Black Female Right Angle Type-A USB 2.0 插件 USB Connectors ROHSBel FuseUSB ConnectorsFFC3B07-20-T
SMD,P=1mm,卧贴-25℃~+85℃ 0.3mm 1mm 2.5mm 20P Bottom Contact Phosphor bronze Slide Lock Surface Mount, Right Angle Tin SMD,P=1mm,卧贴 FFC, FPC (Flat Flexible) Connector Assemblies ROHSGlobal Connector Technology (GCT)FFC, FPC (Flat Flexible) Connector AssembliesARJM11D7-502-AB-EW2
插件-40℃~+85℃ 1 Gold Non-PoE Phosphor bronze RJ45 Jack Right Angle Shielded With LED 插件 Ethernet Connectors / Modular Connectors (RJ45 RJ11) ROHSAbraconEthernet Connectors / Modular Connectors (RJ45 RJ11)PREC002SAAN-RC
插件,P=2.54mm-40℃~+105℃ 1 2.54mm 2.5mm 2P 3.05mm 3A 5.84mm Black Brass Pin Header Through Hole Tin 插件,P=2.54mm Pin Headers ROHSSullins Connector SolutionsPin HeadersSS-53000-001
-- HDMI Connectors ROHSBel FuseD-Sub / VGA Connectors
README
README.mdBuilding a Mobile Device that Leverages the Power of a Desktop Computer
ASU Barrett Undergraduate Thesis 2022
READ THE PAPER HERE
(Alternatively, see it on asu.edu)
Watch a timelapse of the paper here: https://youtu.be/VJ2HCxnmA_Y
Abstract
With the recent focus of attention towards remote work and mobile computing, the possibility of taking a powerful workstation wherever needed is enticing. However, even emerging laptops today struggle to compete with desktops in terms of cost, maintenance, and future upgrades. The price point of a powerful laptop is considerably higher compared to an equally powerful desktop computer, and most laptops are manufactured in a way that makes upgrading parts of the machine difficult or impossible, forcing a complete purchase in the event of failure or a component needing an upgrade.
In the case where someone already owns a desktop computer and must be mobile, instead of needing to purchase a second device at full price, it may be possible to develop a low-cost computer that has just enough power to connect to the existing desktop and run all processing there, using the mobile device only as a user interface.
This thesis will explore the development of a custom PCB that utilizes a Raspberry Pi Computer Module 4, as well as the development of a fork of the Open Source project Moonlight to stream a host machine's screen to a remote client. This implementation will be compared against other existing remote desktop solutions to analyze it's performance and quality.
Information
This repository contains all the files and resources used to produce my Honors Thesis.
Folders are self-explanatory.

Parts
80| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C8, C10, C11, C19, C20, C21, C22 |
| 5 | 100n | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C7, C9, C12, C13, C14 |
| 4 | 1k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R6, R14, R17, R19 |
| 3 | 10uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C3, C6 |
| 3 | Red | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D1, D2, D6 |
| 3 | SS-52100-001 | SS-52100-001:SS-52100-001 | J7, J8, J9 |
| 2 | 1.87M | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R7 |
| 2 | 100k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R9, R11 |
| 2 | 100uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C5, C23 |
| 2 | 1K | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R15, R16 |
| 2 | 200k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5, R8 |
| 2 | 27pF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C17, C18 |
| 2 | 36K 1% | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R22, R23 |
| 2 | 4.7uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C15, C16 |
| 2 | 470R | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R20, R21 |
| 2 | 5.1k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3, R4 |
| 2 | FFC3B07-20-T | FFC3B07-20-T:GCT_FFC3B07-20-T | J4, J10 |
| 2 | Green | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D3, D5 |
| 2 | TPD4EUSB30 | Package_SON:USON-10_2.5x1.0mm_P0.5mm | U6, U7 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_4.0x4.0mm | TP1, TP2 |
| 1 | 0.1uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2 |
| 1 | 1.0k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R12 |
| 1 | 12K 1% | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R24 |
| 1 | 12k 1% | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R18 |
| 1 | 15K 1% | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R25 |
| 1 | 15k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R10 |
| 1 | 2.2uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C4 |
| 1 | 24MHz | Crystal:Crystal_SMD_HC49-SD | Y1 |
| 1 | 270k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R13 |
| 1 | 340k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2 |
| 1 | 6.8uH | NRS5030T6R8MMGJ:NRS5030T6R8MMGJ | L1 |
| 1 | 74LVC1G07 | Package_TO_SOT_SMD:SOT-353_SC-70-5 | U3 |
| 1 | AP22653W6-7 | AP22653W6-7:SOT95P280X145-6N | U9 |
| 1 | ARJM11D7-502-AB-EW2 | ARJM11D7-502-AB-EW2:ARJM11D7502ABEW2 | J6 |
| 1 | ComputeModule4-CM4 | CM4IO:Raspberry-Pi-4-Compute-Module | CM4 |
| 1 | JST 2-PH | JST_S2B-PH-K-S(LF)(SN):JST_S2B-PH-K-S(LF)(SN) | B1 |
| 1 | MCP73871-2CCI_ML | digikey-footprints:QFN-20-1EP_4x4mm_RevA | U2 |
| 1 | MMUN2133LT1G | MMUN2133LT1G:SOT95P240X111-3N | Q1 |
| 1 | Micro_SD_Card_Det | CM4IO:SDCARD_MOLEX_503398-1892 | J5 |
| 1 | Orange | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D4 |
| 1 | PREC002SAAN-RC | PREC002SAAN-RC:PREC002SAAN-RC | J2 |
| 1 | RT9742ENGJ5 | Package_TO_SOT_SMD:SOT-23-5 | U5 |
| 1 | RT9742VGJ5 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | SS-53000-001 | SS-53000-001:STEWART_SS-53000-001 | J3 |
| 1 | TPS61090RSAR | TPS61090RSAR:QFN65P400X400X100-17N | U1 |
| 1 | USB2504A-JT | USB2504A-JT:USB2504A-JT | U8 |
| 1 | USB4125-GF-A_REVA2 | USB4125-GF-A_REVA2:GCT_USB4125-GF-A_REVA2 | J1 |
Questions
How big is the Lathrum thesis PCB?
It measures 158.3 × 110 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Lathrum thesis use?
80 parts, built around the 74LVC1G07, MCP73871-2CCI/ML, RT9742ENGJ5 and RT9742VGJ5. 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 Lathrum thesis KiCad files?
From the Dylancyclone/thesis repository on GitHub, at the commit this page was made from: the board is kicad/lathrum_thesis/lathrum_thesis.kicad_pcb and its schematic kicad/lathrum_thesis/cm4.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lathrum thesis design in my own project?
Its repository states no licence, so its author keeps all rights: ask Dylancyclone before reusing the design.
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