Embedded Systems · Robotics · Silicon & Hardware Hacks

I build unconventional embedded systems, micro-robotics, and hardware-software bridges. My work focuses on pushing sub-dollar microcontrollers beyond their documented boundaries—whether that means hand-rolling 1-wire SWIO debuggers, packaging custom Arduino cores for uncooperative RISC-V silicon, salvaging dead consumer electronics into wireless modems, or building micro-quadcopter flight controllers with discrete MOSFET stages.

       [ Discarded Consumer Tech ]         [ Sub-$0.50 Silicon ]
                    │                                │
                    ▼                                ▼
       TWS Earbuds ──► 3-FSK Modem         Bouffalo BL602 (192MHz RISC-V)
       LiPo Cells  ──► Micro Drone FC      WCH CH32V003 (1-Wire SWIO)
                    │                                │
                    └───────────┬────────────────────┘
                                │
                                ▼
         [ Deterministic Firmware · Real Bench Probes ]

• ESP32-Digital-Lab — An all-in-one browser-based electronics instrument running on a single original ESP32 (ESP32-D0WD-V3). Integrates a 1 Hz–5 MHz reciprocal frequency counter (PCNT0), 5 MHz signal generator (LEDC), 2 MS/s 4-channel parallel logic analyzer (I2S DMA), and an oversampled DMM with dual-Schottky input protection into a zero-install, <20KB gzipped WebSockets dashboard.
• BL602-Arduino-Core — An end-to-end Arduino-compatible development workflow for Bouffalo Lab BL602 (192 MHz RISC-V RV32IMAFCP with hardware FPU). Preserves native SDK FreeRTOS scheduling, fixes the 2 Mbaud console trap, patches flash loader JEDEC mismatches, and distributes via an automated Arduino Boards Manager package.
• TWS-A2DP-Mode — Expanding the 3-FSK acoustic/electrical modem from the verified 8-bit ATmega328P target to the sub-$0.15 WCH CH32V003 RISC-V microcontroller for ultra-low-cost wireless telemetry.

Microcontrollers     │ ESP32 · ESP32-C3 · ESP32-S3 · BL602 (RV32IMAFCP) · CH32V003 (QingKe RISC-V) · ATmega328P
Peripherals & Buses  │ 1-Wire SWIO · I2S Parallel DMA · PCNT Pulse Counter · LEDC High-Speed PWM · ADC Oversampling
Physical Protocols   │ 3-FSK Modulation · UART · SPI · I2C · BLE 5.0 · 2.4GHz Wi-Fi (SoftAP / WebSockets)
Firmware & Tooling   │ C · C++ · Python · Assembly · FreeRTOS · ESP-IDF · Arduino Core Internals · PlatformIO
Electronics & Bench  │ Discrete MOSFET Stages (SI2306A) · H-Bridges (CP6208) · Schottky Clamping (SS14/BAT54S) · BTL Tapping

• Datasheets are starting points, not limits: Silicon vendors document guaranteed baselines. Pushing hardware into non-standard clock trees, 1-wire bit-banging, or parallel DMA sampling reveals what the silicon can actually do.
• Hardware reuse over e-waste: Discarded TWS earbuds, miniature LiPo pouches, and phone vibration motors contain precision transducers and power electronics that outperform bulk hobbyist modules when driven correctly.
• Isolate the real-time domain: Keep high-speed physical signaling and bit-banging in deterministic firmware; offload protocol decoders, user interfaces, and telemetry visualization to client-side runtimes.
• Measure on the bench: Theoretical calculations are useless until validated with logic analyzer captures, current shunt measurements, and physical hardware execution.

_{Hardware verified on the bench · Clean firmware · No black boxes}