Mechatronics & Mechanical Engineering

Beckett Mazeau

Engineer & Designer — building at the intersection of precision mechanics, embedded systems, and industrial design.

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Beckett Mazeau — portrait

About Me

I'm Beckett Mazeau, a Mechatronics Engineer with deep expertise in Mechanical Engineering and Engineering Design. My work lives where physical systems meet intelligent control — designing mechanisms that move with purpose and electronics that respond with precision.

From concept sketches through CAD modeling, prototyping, and final integration, I approach every project with a systems-level perspective. Whether it's a robotic end-effector, a custom test rig, or a consumer product, I'm driven by the challenge of making complex systems elegant and reliable.

My toolkit spans SolidWorks, Fusion 360, FEA/CFD simulation, embedded C/C++, PCB layout, and rapid prototyping (FDM, SLA, CNC). I believe the best engineering happens when disciplinary boundaries dissolve.

— Projects Completed
— Grad Year
— CAD Models Built

Stats coming soon — this section is still being finalized.

In Progress
STIK-eNote — product render showing the clamshell device open with TFT display and keyboard

STIK-eNote

A Pocketable E-Paper Task Tracking Device

STIK-eNote is a pocketable, clamshell-style task-management device built around the PocketBeagle. The core idea: a distraction-free tool that is always in your pocket and always showing your priorities at a glance — no phone, no laptop required.

When the lid is closed, nearly all peripherals are shut off and only the low-power e-Paper display remains active, persisting a task summary at near-zero draw. Opening the clamshell trips a magnetic sensor (replacing the original reed switch), which brings up a 240×320 TFT color display and a full mini keyboard for task editing — then cuts them again the moment the lid closes.

  • PocketBeagle
  • E-Paper + TFT Display
  • KiCad PCB Design
  • P-FET Power Gating
  • I²C / SPI
  • C / Linux

Last updated:

Project Details

Dual Display

An e-Paper panel (GDEY0213B74 via DESPI-C02 adapter) shows a persistent task list at effectively zero standby power. A 240×320 TFT (YT280S010) activates only when the device is open for editing.

Smart Power Gating

Three BSS84 P-channel MOSFETs act as high-side switches on the 5 V boost rail, the TFT, and the e-Paper adapter. A DRV5032 omnipolar magnetic sensor (replacing the earlier reed switch) detects open/close state and drives the gate signals from the PocketBeagle's GPIO.

5 V Boost & Level Shifting

A TPS613222ADBVR synchronous boost converter steps 3.3 V up to a quiet 5 V rail for the CardKB V1.1 keyboard. Two BSS138 N-channel MOSFETs form a bidirectional I²C level shifter so the 3.3 V PocketBeagle can talk to the 5 V keyboard without damage or signal corruption.

Compact Keyboard

The M5Stack CardKB V1.1 provides a full QWERTY layout in a credit-card footprint. It connects over I²C through the level shifter, requiring only two signal lines from the PocketBeagle.

Circuit Schematic — V2

Six-sheet schematic organized by subsystem. Rev V2 moves from a single crowded page to industry-standard separation by functional block, with labeled net names replacing point-to-point wiring. Made for EDES 301, Rice University. Click any sheet for a closer look.

STIK-eNote V2 schematic sheet 1 of 6 — Main PocketBeagle pin assignments and peripheral connections
Sheet 1/6 — STIK-eNOTE · PocketBeagle pin assignments, battery thermistor, and top-level net routing to all peripheral subsystems.
STIK-eNote V2 schematic sheet 2 of 6 — 3.3V to 5V Boost Converter
Sheet 2/6 — 3.3V to 5V Boost Converter · TPS613222ADBVR synchronous boost with BSS84 P-FET high-side switch for power gating.
STIK-eNote V2 schematic sheet 3 of 6 — Hall Effect Power Switch
Sheet 3/6 — Hall Effect Power Switch · DRV5032FCDBZR latching hall sensor with signal inverter for lid-open/close detection and PocketBeagle wake.
STIK-eNote V2 schematic sheet 4 of 6 — TFT Display Connection Circuitry
Sheet 4/6 — TFT Display Connection · YT280S010 TFT wiring with backlight transistor driver and P-FET power switch.
STIK-eNote V2 schematic sheet 5 of 6 — CardKB Support Circuitry
Sheet 5/6 — CardKB Support Circuitry · Bidirectional I²C level shifting (BSS138 MOSFETs) between 3.3V PocketBeagle and 5V CardKB keyboard.
STIK-eNote V2 schematic sheet 6 of 6 — ePaper Support Circuitry
Sheet 6/6 — ePaper Support Circuitry · GDEY0213B74 e-Paper display via FPC connector with P-FET power gating and boost converter for PREVGH/PREVGL rails.

5 V Boost Converter

The TPS613222ADBVR is a synchronous boost converter stepping the PocketBeagle's 3.3 V rail to a stable 5 V for the keyboard. A 2.2 µH inductor (VLS252012ET-2R2M) stores energy each switching cycle; 10 µF input and output caps (CL10A106KP8NNNC) minimise ripple. A BSS84 P-FET gates the entire 5 V rail on/off from GPIO.

P-FET Power Switches

Four BSS84 P-channel MOSFETs act as high-side switches across the design. Each gate defaults HIGH (off) via a 100 kΩ pull-up; a 0.1 µF cap across gate-source slows the turn-on edge to limit inrush. Instances cover the 5 V boost, the TFT, the e-Paper adapter, and the hall sensor output.

Bidirectional I²C Level Shifter

Two BSS138 N-channel MOSFETs handle SDA and SCL independently. Each channel carries 10 kΩ pull-ups on both voltage sides (RC0603FR-0710KL). The classic open-drain MOSFET topology provides reliable bidirectional translation with minimal propagation delay and no dedicated IC.

Magnetic Lid Detection

A DRV5032FCDBZR latching Hall-effect sensor detects a cylindrical magnet in the lid. A signal inverter flips the output polarity to match the PocketBeagle's wake-on-GPIO logic level. The solid-state sensor replaces the original reed switch, eliminating contact bounce and false wake/sleep transitions.

E-Paper Support

The GDEY0213B74 e-Paper display connects through a 24-pin FPC (FH12-24S-0.5SH55). A PMF250XNEX dual N-channel MOSFET and four B0530W-7-F Schottky diodes generate the PREVGH and PREVGL rails the display requires. A 47 µH inductor (IFSC2020DEER470M01) and associated capacitors form the boost circuitry for these higher-voltage rails.

Bill of Materials (DigiKey cart, Mar 26 2026)

Component Part Number Qty Unit $ Ext. $
Boost Converter ICTPS613222ADBVR1$0.49$0.49
NPN Transistor (TFT Backlight)SS8050-G1$0.24$0.24
N-CH MOSFET (Level Shift)BSS1382$0.28$0.56
P-CH MOSFET (Power Switch)BSS8410$0.031$0.31
Dual N-CH MOSFET (ePaper)PMF250XNEX1$0.26$0.26
Schottky DiodeB0530W-7-F4$0.15$0.60
Hall Effect SensorDRV5032FCDBZR2$0.32$0.64
Cylinder Magnet 6x2.5 mm90282$0.49$0.98
NTC Thermistor 10 kΩNXRT15XH103FA1B0401$0.35$0.35
Inductor 2.2 µH (Boost)VLS252012ET-2R2M1$0.25$0.25
Inductor 47 µH (ePaper)IFSC2020DEER470M011$0.24$0.24
Cap 47 µF 0805CL21A476MQYNNNG1$0.29$0.29
Cap 10 µF 0603CL10A106KP8NNNC5$0.18$0.90
Cap 4.7 µF 0603GRM188R61E475KE11D2$0.08$0.16
Cap 1 µF 0603CL10B105KA8NNNC15$0.036$0.54
Cap 0.1 µF 0603CC0603KRX7R9BB10410$0.024$0.24
Res 1 MΩ 0603RC0603FR-071ML10$0.008$0.08
Res 100 kΩ 0603RC0603FR-07100KL10$0.006$0.06
Res 10 kΩ 0603RC0603FR-0710KL10$0.01$0.10
Res 1 kΩ 0603RC0603FR-071KL10$0.008$0.08
Res 2.2 Ω 0603RC0603FR-072R2L10$0.011$0.11
FPC Connector 24-pos 0.5 mmCF4224FH0R0-05-NH1$0.36$0.36
FPC Connector 18-pos 0.5 mmCF4218FH0R0-05-NH1$0.34$0.34
FPC Connector 18-pos (board)FH34SRJ-18S-0.5SH(50)1$1.05$1.05
DigiKey Subtotal $8.93

Additional Components (off-board)

  • PocketBeagle (Original) — main SBC / MCU running Linux at 3.3 V logic
  • CardKB V1.1 (M5Stack) — full QWERTY mini keyboard, I²C, 5 V
  • GDEY0213B74 — 2.13″ e-Paper display, SPI, with DESPI-C02 adapter board
  • YT280S010 — 2.8″ TFT, 240×320, SPI, 3.3 V

Purchased quantities for passives exceed BOM requirements due to lower unit pricing at higher order volumes.

Selected Work

A selection of engineering and design case studies — from concept through fabrication. Each card links to a detailed breakdown.

Project Updates

Short dispatches from the workbench — progress notes, design decisions, and lessons learned.