WiFi-enabled ultrasonic water flow meter interface for 3/4 inch PVC pipe with USB-C power, ESP32 WiFi, 12V RS485 sensor supply, and protected sensor interface.

Industrial ESP32-S3 master gateway with Ethernet (W5500), LoRa 433 MHz, microSD storage, RTC, USB-UART console/debug interface (CP2102N), and isolated RS485 ports using ADM2587 transceivers. The design includes ESP32-S3-WROOM-1-N16R2 as the main controller, W5500 Ethernet, LoRa antenna interface, microSD connector, RTC circuitry, CP2102N USB-to-UART programming/debug console, SC16IS752 UART expanders, isolated RS485 channels, power regulation, ESD/surge protection, connectors, and mounting holes. Cellular/BG95/SIM functionality and true RS232 console hardware are not included; J1 is used only as the microSD card connector.

Four-channel electrochemical gas sensor signal-conditioning module based on the TI LMP91000EVM architecture, with shared I2C, per-channel SPI ADCs, 2.5V reference, sensor headers, and STM32F767ZI interface.

Functionally similar multi-channel electronic lock controller with 24 V lock outputs, 3.3 V logic, MCU control, shift-register expansion, CAN interface, test/reset controls, and protected solenoid driver stages.

Arduino Mega 2560 sensor/actuator interface shield for a firefighting differential robot with labeled connectors, onboard IR receiver, buzzer, MPU6050 header, battery VIN protection, battery sensing, LED outputs, and fan MOSFET control.

USB4 external NVMe SSD enclosure PCB targeting an ASM2464PDX-class USB4 40 Gbps device controller with PCIe Gen4 x4 downstream M.2 NVMe interface, USB-C upstream port, power management, ESD protection, and controlled-impedance layout constraints.

Arduino Nano-style ATmega328P breakout with CH340G USB-to-serial interface, USB power input, reset/clock support, and programming headers.

2-layer mezzanine HAT for LILYGO T-SIM7600G-H R2 adding dual CAN, protected 12V-to-5V power, and vehicle connector interface.

Minimal ESP32 and PC817 optocoupler schematic for an isolated WiFi-controlled PC motherboard power-switch interface.

Industrial 415V 3-phase motor control interface with STM32 command logic, SIMCom A7672S 4G SMS control, isolated relay driver, 12V input power, and 150x100mm 2-layer PCB constraints.

48V tether-powered Ethernet-to-WiFi bridge using Blue Robotics Fathom-X style tether interface and ESP32-S3 WiFi output, with isolated/buck DC/DC rails for the tether interface and ESP32.

INA3221 current and voltage monitor interface for an HC-SR04 ultrasonic sensor, with 5V sensor power routed through a shunt and I2C output to a host MCU.

Fully integrated Arduino Uno shield with 13.56 MHz RFID reader, microSD card interface, isolated relay output for a 120 VAC signal circuit, and 28 VDC to 5 V buck power input.

4-layer STM32F303 + AFE4404 photoplethysmography detector for embryo heartbeat sensing through eggshell, with USB-C power/data, TFT display, optical FFC interface, low-noise analog layout constraints, and manufacturing-ready outputs.

EV motorcycle instrument cluster using STM32H743IIT6 main MCU, display interface, CAN, USB, charging, and power supervision

Production-intent Raspberry Pi Compute Module 5 carrier board for SitePulse, integrating rugged wide-input power, CAN bus, protected relay/engine-control outputs, I2C expansion, Predator engine data sniffer interface, debug/status I/O, and field-ready connectors for job-site/off-grid use.

ESP32-S3 based controller for a DMX-controlled motorized pan/tilt mirror head with Dynamixel servo control and GPS solar tracking. This step establishes the MCU, USB-C flashing/debug interface, reset/boot circuitry, and status LED on a 3V3 rail.

Single M5Stack Cardputer ADV HAT integrating CC1101 sub-GHz radio, nRF24L01+ PA/LNA 2.4GHz radio, LoRa RA-02, and PN532 NFC with shared host interface, 3.3V power distribution, decoupling, and RF layout constraints.

ESP32 sensor node with an I2C temperature sensor and load-cell ADC interface.

UK Smart Wall Switch Back Board: 802.3af PoE-powered 65x65mm relay and energy-monitoring back board with RJ45, isolated 5V/3.3V rails, W5500 Ethernet, BL0942 metering, touch ICs, and 12-pin pogo interface.

USB-C powered ESP32 WiFi water flow meter with 12V RS485 ultrasonic sensor interface for 3/4 inch PVC pipe Vibe-hardwared

Manufacturable Rev A proof-of-concept PCB system for the SOLX modular magnetic lamp platform, documenting a standardized magnetic pogo-pin electrical pass-through interface, 12V low-voltage power transfer, reserved data/ID contacts, module identification support, automatic configuration recognition, lifecycle metadata tracking capability, and patent-supporting manufacturing/test documentation.

Smart weighing + vision recognition controller using a Seeed XIAO ESP32-S3, Grove Vision AI V2 connected only by 3V3/GND/SDA/SCL, and a simple four-pin ESP32-S3 expansion interface for D2/GPIO3 and D3/GPIO4; no onboard HX711 or load-cell connector.

Compact inline ESP32-S3 USB-C powered OTG cable interface for TI-Nspire CX II calculators

WiFi-enabled 3/4-inch PVC ultrasonic water flow meter with protected USB-C power, ESP32 WiFi, 3.3V regulation, 12V sensor supply branch, RS485 sensor interface, UART programming, reset network, and status LEDs.