This is one of the simplest FM transmitters that can be built. It does not require any tuning, and transmit frequency is crystal locked to 90MHz. It eliminates frequency drift common to LC-based FM transmitters. This design is best suited for broadcasting voice or music up to a distance of fifty metres depending on the antenna used.

NEO-M9N GPS Breakout with on-board chip antenna is a high quality GPS board with equally impressive configuration options. The NEO-M9N module is a 92-channel u-blox M9 engine GNSS receiver, meaning it can receive signals from the GPS, GLONASS, Galileo, and BeiDou constellations witn ~1.5 meter accuracy. This breakout supports concurrent reception of four GNSS. This maximizes position accuracy in challenging conditions, increasing precision and decreases lock time; and thanks to the onboard rechargeable battery, you'll have backup power enabling the GPS to get a hot lock within seconds! Additionally, this u-blox receiver supports I2C (u-blox calls this Display Data Channel) which made it perfect for the Qwiic compatibility so we don't have to use up our precious UART ports. Utilizing our handy Qwiic system, no soldering is required to connect it to the rest of your system. However, we still have broken out 0.1"-spaced pins in case you prefer to use a breadboard.

SPECIFICATIONS: • Gain: 10dBi @ 2.4/5.8GHz • Impedance: 50Ω • VSWR: <1.5:1 • Connector: SMA Male • PCB: FR-4, 1.6mm • Type: Yagi-Uda • Polarization: Vertical

12–24 VDC GPS-fix-controlled dual relay board. Relays switch immediately based on valid GPS fix status and provide SPDT contacts for 12/24 V loads up to 3 A with external GPS antenna support.

Ruggedized battery-powered PeakNode 1 LoRa PWAN node with SX1262 LoRa mesh over SPI, LTE Cat-M1/NB-IoT modem, GNSS, LPCNet-capable audio path, USB-C charging and LiFePO4 power management. Targets a 4-layer 90 mm x 60 mm IPC Class 2 layout with 3.3 V main and 1.8 V I/O rails, dual SMA antennas, two RGB status LEDs, three tactile buttons, low-leakage power architecture for sub-10 uA sleep, and defined RF keep-out zones under the LoRa and LTE antenna regions.

High-level recreation of the ThirstIQ Cap wiring diagram using an ESP32-WROOM-32 with AMS1117-3.3 regulated battery input, inline ON/OFF switch, four touch input headers on IO32/IO33/IO25/IO26, shared I2C OLED and RTC on IO21/IO22, UART debug/programming header on TXD0/RXD0, BOOT and RESET pushbuttons on IO0 and EN, buzzer on IO4, common 3V3/GND distribution, and PCB preparation for a 160 mm x 100 mm 4-layer layout. Layout intent includes clean 3.3 V power distribution, local decoupling for regulator and ESP32, accessible external headers/buttons, short clean BOOT/EN traces, shared I2C routing, touch-signal separation from noisy power and buzzer traces, and ESP32 antenna keepout.

Bluetooth RC car controller using ESP32-WROOM-32E, TB6612FNG dual H-bridge, XL4015 5V buck module, DC barrel battery input, dual 2-pin motor screw terminals, 1000uF VM bulk capacitor, 100nF decoupling, 10k EN pull-up, 30 mil power traces, 10 mil signal traces, and ESP32 antenna edge keep-out.

Waterproof ESP32-C6 BLE MTB GPS Computer with NEO-M9N, LiPo Power Management, USB-C, and External SMA Antenna

This is a compact, high-performance RFID antenna solution built on a printed circuit board configurations. It has miniature RF connector (also known as a U.FL or IPX connector) that allows easy connection to an external antenna. It’s especially useful when you want better signal performance or need to position the antenna away from the main board (e.g., in an enclosure or plastic housing).

A PCB for automotive testing, featuring a 24 GHz radar system with an MCU for processing I&Q values. It connects to a frequency analyzer and uses CW and FMCW modes to detect bicyclists in blind spots of parked cars.

Welcome to your new project. Imagine what you can build here.

Welcome to your new project. Imagine what you can build here.

This is an ESP32-C3 reference design based on the manufacturer's recommendations with a uFL SMD antenna and USB C on board #WiFi #ESP32-C3 #IoT #referenceDesign #simple-embedded #espressif #template #reference-design

ESP8684H4 based thermostat module which will control the heater. The module will have 18650 Li-Ion battery cell with 3.7V nominal voltage. The module also has a switch-mode buck NVDC power path which can simultaneously charge the battery and provide power to the system. The system voltage is 3.3V. Input voltage is 5V from USB-C. The system also contains a temperature, humidity and pressure sensor. The Wi-Fi and Bluetooth antenna implemented by PCB tracks.

This is one of the simplest FM transmitters that can be built. It does not require any tuning, and transmit frequency is crystal locked to 90MHz. It eliminates frequency drift common to LC-based FM transmitters. This design is best suited for broadcasting voice or music up to a distance of fifty metres depending on the antenna used.

This is an ESP32-C3 reference design based on the manufacturer's recommendations with a uFL SMD antenna and USB C on board #WiFi #ESP32-C3 #IoT #referenceDesign #simple-embedded #espressif #template #reference-design

RF Module, ESP32-D0WD SoC, Wi-Fi 802.11b/g/n, Bluetooth, BLE, 32-bit, 2.7-3.6V, onboard antenna, SMD

This is an ESP32-C3 reference design based on the manufacturer's recommendations with a uFL SMD antenna and USB C on board #WiFi #ESP32-C3 #IoT #referenceDesign #simple-embedded #espressif #template #reference-design

An automatic satellite/planet tracker. It can precisely point an antenna or telescope to a moving spacecraft or tracking a planetary object.

Prototype breadboard-friendly breakout board for the Realtek RTL8761BTV-CG Bluetooth 5 UART HCI controller, with 0.1 inch headers, 3.3 V power input, support passives, 40 MHz crystal, and RF antenna matching provisions.

Production-intent ESP32-C6 controller for WS2812B/WS2815 addressable LED strips with 5V/10A input protection, strip high-side switching, 5V data level shifting, user buttons, and antenna keepout requirements.

UL-listed fire alarm signaling IoT device using STM32H757, dual Quectel EC21-AUV cellular modules, USB-C programming, LCD UI, dual SIM, dual antenna ports, 8 inputs, and isolated/dc-dc-coupled Quectel power/interface domains.

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.

Rigid-flex smart ring for Islamic prayer companion use, with compact BLE SoC, capacitive swipe electrodes, haptic feedback, rechargeable battery power, and body-worn BLE antenna constraints.

Business-card-size PCB for Brooks Solveig with name/email silkscreen, Flux logo, LinkedIn QR code, and a passive NFC tag antenna linking to the same LinkedIn profile.