peter hill

projects

multidrop uart

Low-complexity shared bus with device discovery, address resolution, GPIO, and ADC over RS-422. Includes Python-based UART validation tooling.

rs-422 uart python embedded

battery & power systems

Li-ion charger circuits (LiFePO4, NMC/NCA), USB power monitors, and switched USB devices. Focus on safety, thermal management, and efficiency.

lifepo4 usb power electronics

circuitpython experiments

Toolless code distribution for embedded hardware. Open-source battery management firmware with frictionless device customization.

circuitpython micropython bms

usb type-c & power delivery

Analysis of USB PD 3.1: connector spacing at 48 V, standards complexity, and the tradeoffs of a connector designed to do everything.

usb-c power delivery standards

mpsoc loader (ps/pl)

Vitis-free ZynqMP bare-metal: A53 from OCM, JTAG console, OpenOCD PL load for every MPSoC fabric, and named EMIO pin control on Kria K26.

zynqmp openocd fpga bare-metal

stm32 loader

One-USART G0 bootloader: app jump and reload, framed multi-drop protocol, and blank-target programming via the ST ROM path on the same wire.

stm32g0 bootloader usart python

obd rpi tesla

Pi Zero 2W dashboard and logger for Tesla Model 3 CAN via OBDLink Bluetooth - live web UI, signal decode, and optional Home Assistant hooks.

raspberry pi can obd python

home agent

Personal household assistant over chat - local LLM first, cloud when needed, Home Assistant skills, and that Iron Man “talk to the house” vibe without the movie budget.

llm home assistant python telegram

github

writing

guide hardware

usb type-c and power delivery

A look at USB PD 3.1, the spacing implications of pushing 48 V through Type-C connectors, and whether the complexity of "one connector to rule them all" is worth it.

read

project fpga

mpsoc loader - ps/pl bare-metal

Lab-first Zynq UltraScale+ stack: OCM-only A53, JTAG console, OpenOCD PL load across MPSoC fabric variants, and named pin control - without Vitis.

read

project embedded

stm32 loader - one uart, three jobs

STM32G0 bootloader on a single USART: jump or stay, reload the app over a framed bus, and reconfigure the same wire to program blank parts via the ST ROM path.

read

about

electrical designer & embedded hardware engineer

Professionally building complex, high-reliability hardware and embedded systems: schematic and PCB design, architecture, and technical review.

Outside work, still hands-on across the stack - microcontrollers, power electronics, batteries, FPGAs / MPSoC, home automation, and 3D printing.

Recent projects include a Vitis-free Zynq UltraScale+ bare-metal loader (PS/PL bring-up over OpenOCD on Kria), a single-USART STM32G0 bootloader for app reload and blank-target programming, a Pi Zero Tesla Model 3 OBD/CAN dashboard, and a local-first home agent tied into Home Assistant.

Also working through multidrop serial buses, Li-ion / LiFePO4 power systems, CircuitPython experiments, and the messy reality of USB Type-C / Power Delivery at higher voltages.

Exploring LLMs, offline inference, and RAG tooling where they help the lab and the house - and sharing designs, write-ups, and a passion for the craft.