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.

Säker 12 V till fast 5,1 V USB-C-strömbrytare för Raspberry Pi 5 med ESP32-C3-styrd start, normal nedstängning och hård avstängning utan USB-C PD.

Microcontroller-based ozone generator control board for 12 V or 24 V DC input, drawing roughly 3.5 A at 12 V or 1.8 A at 24 V, with matched VIN-powered field devices, protected input, regulation, ATMEGA328PB control, pressure/flow sensing, MOSFET-switched load outputs, programming/debug headers, and status indicators.

Consumer USB-C powered temperature/humidity sensor node using a low-power Wi‑Fi + BLE MCU, protected 5 V input, and 3.3 V sensing/control rail.

Production-ready industrial 6 V battery-powered LoRaWAN DC motor controller using ESP32-S3FN8, SX1262 AU915, CP2102N USB-C programming, DRV8833 motor drive, TLV62568 buck regulation, protected battery input, and Heltec LoRa V3-compatible development workflow.

Player audio stereo VS1063 cu amplificator TAS DSP 2×35 W / 8 Ω, SD card, 3 encodere și alimentare auto 12–24 V protejată

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.

Carrier board for the RAK3312 ESP32-S3/SX1262 LoRaWAN module with USB-C 5 V input, 1 A 3.3 V rail, SEN66 sensor connector, RGB status LED, and reset control.

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.

Regenerative braking power generation and charging circuit using two DC motor generators, rectification, TVS protection, supercapacitor buffering, a 2S Li-ion buck-boost charger, BMS protection, and regulated 5 V/3.3 V load rails.

ESP32-S3 Industrial PLC Controller schematic architecture for a 24 V industrial PLC with W5500 Ethernet, isolated RS485, 8 opto-isolated digital inputs, and 8 protected high-side outputs.

Battery-powered infrared/PIR sensor board with USB-C charging, single-cell LiPo battery input, 3.3 V regulation, sensor output header, and status indicators.

12 V interface/wiring board for a SECO-LARM E-931-S35RRQ photoelectric sensor, battery source, and normally-closed electromagnetic lock control.

Multi-subsystem ESP32-S3 coffee maker/alarm controller board for a Coffee Waker appliance. The design uses an ESP32-S3-WROOM-1-N8R8 module as the main Wi-Fi/Bluetooth MCU, with USB-C 2.0 device connectivity through a USB4105-GF-A connector, 5.1 kΩ CC pull-downs, and USBLC6-2SC6 ESD protection on the USB D+/D− pair. Power architecture includes a 12 V input on a JST VH B4P connector, a TPS62932 buck regulator generating the 5 V rail, a TLV1117LV33 3.3 V LDO for MCU/logic power, and TPS22919 load switches for controlled 3.3 V/5 V peripheral rails. Functional blocks include an NAU7802 load-cell ADC on I2C with two differential load-cell channels, a MAX98357A I2S audio amplifier/DAC with speaker/output filtering, a microSD socket on SDIO, I2C/test headers, UART/programming header, and auxiliary JST VH connectors for wake-light or external loads. The high-voltage section includes 120 VAC input/output screw terminals, a 5 V SPST-NO relay rated 15 A / 240 VAC max, a 1 A fuse, MOV surge suppression, diode snubber, and a dedicated heater output terminal.

Industrial 24 V DC MESBox controller with embedded Linux SOM, STM32 real-time I/O, triple RJ45 Ethernet, TFT display, isolated inputs, protected transistor outputs, offline memory, surge/reverse-polarity protection, and EMC-focused layout constraints.

5 V, 10 W MOSFET low-side heater driver controlled from an MCU DAC/gate-control output, including power/heater connectors and basic gate protection.

Low-voltage control and power-control electronics for a 10-channel 220 V AC power sequencer using ESP32, shift registers, OLED display, and isolated/high-current AC sections to be added later.

ESP32-S3 automotive controller with shared-ground CAN bus, USB serial/programming, protected 12 V input, and optocoupled PWM low-side control for an active exhaust valve.

Controller-less 16×16 WS2812B RGB LED matrix panel with external 5 V high-current screw-terminal power input, JST data in/out connectors, fuse protection, bulk capacitance, and power injection points.

Quad BLDC Drone interceptor with dual STM32G474 controllers, sensored motor feedback, and 22 V battery input.

Quad BLDC Drone interceptor with dual STM32G474 controllers, sensored motor feedback, and 22 V battery input.

Low-power consumer temperature/humidity sensor node using USB-C 5 V input, protected 3.3 V power, and an ESP32-class Wi-Fi/BLE 5.x module.

Placa básica ESP32-S3 alimentada y programable por USB-C, con regulador de 3.3 V, circuito de arranque/reset y desacoplos mínimos para desarrollo.

Battery-powered ESP32-C6 Thread environmental sensor using SCD41 for temperature and CO2, USB-C for charging/data, LiPo power, and a buck-boost 3.3 V rail.

5 V Omron G2RL relay driver PCB using an MMBT2222A low-side transistor, input terminals, flyback diode, and screw-terminal relay output.