Vibe-wared 5 V 10×10 monochrome LED matrix with 10 mm pitch, cascaded constant-current serial drivers, multiplexed row switching, and an external controller interface.

Battery-powered ESP32-S3 LoRa ePaper sensor board with SHT41 environmental sensing, LiPo charging/fuel gauge, 5V input detection, and a 4.2 inch 300x400 b&w ePaper interface in an 85 x 60 mm low-profile PCB.

Universal PWM Interface Module: 12 V automotive-input board for configurable ECU PWM input conditioning and open-collector fan-module output, with TVS/reverse-polarity/PTC protection, 5 V buck, 3.3 V LDO, selectable pull-up rails, inversion jumper, status LEDs, test pads, mounting holes, and DT13-08PA connector placeholder.

8-channel USB Audio Class 2.0 line-input interface using AK5558 ADC and XMOS XU208 USB bridge

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.

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.

Control PCB for a robotic platform with 24V input, STM32F427ZI coordination, Ethernet/USB/CAN/RS-485/wireless interfaces, load gating, thermal control, and STO safety monitoring.

Motherboard for a sixteen-channel 807 nm laser system with Teensy 4.1 audio/PWM control, NUCLEO-G474RE safety/temperature supervision, Raspberry Pi 5 interfaces, protected 5 V input, and 16 DMN2056U low-side laser switches.

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 ESP32 industrial carrier board for the Ascent Condensation Intelligence Monitor with environmental, PT1000, condensation, RTC, SD, LiDAR, LTE expansion, relay, buzzer, and protected field interfaces.

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-centered controller PCB with 14.8 V battery bus, external 3.3 V and 12.2 V buck converter interfaces, motor logic headers, and servo driver connections.