LDTO-028K PVDF Piezoelectric Film Vibration Sensor with Cable Charge Amplifier Pressure Sensor Trigger Switch Module The LDT0-028K is a flexible component comprising a 28 µm thick piezoelectric PVDF polymer film with screen-printed Ag-ink electrodes, laminated to a 0.125 mm polyester substrate, and fitted with two crimped contacts. As the piezo film is displaced from the mechanical neutral axis, bending creates very high strain within the piezopolymer and therefore high voltages are generated. When the assembly dimensions is deflected by direct contact, the device acts as a flexible "switch", and the generated output is sufficient to trigger MOSFET or CMOS stages directly. If the assembly is supported by its contacts and left to vibrate "in free space" (with the inertia of the clamped/free beam creating bending stress), the device will behave as an accelerometer or vibration sensor. Adding mass, or altering the free length of the element by clamping, can change the resonant frequency and sensitivity of the sensor to suit specific applications. Multi-axis response can be achieved by positioning the mass off center. The LDTM-028K is a vibration sensor where the sensing element comprises a cantilever beam loaded by an additional mass to offer high sensitivity at low frequencies.

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TTL to RS485 Conversion Modules Auto Flow Control Board RS485 to TTL Signal Microcontroller Serial UART

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D1 R32 ESP32 Development Board BT Wifi Module 4MB Flash USB Micro 53MM*68MM

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ESP32 Development Board WIFI BT Module for USB Dongle Hardware Key 4MB Flash CH343P MINI USB Flash Disk Tools

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New ESP32-S3 N16R8 Development Board BT 2.4G Wifi Module for Arduino 8MB PSRAM 16MB FLASH with WS2812 LED CH340 Type-C ESP32S3

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BT 2.4G Wifi Module ESP-32 Development learning Board with 18650 Battery Holder ESP32-32 CP2102 Serial USB Micro

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2.4G WIFI Module Development Board for Arduino DIY Internet of Things NodeMcu V3 USB Micro CH340 CP2102 CH9102X Serial ESP8266

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Voice Sound Module for Arduino MP3 Player Module UART I/O Trigger Class D Amplifier Board 5W 8M Storage SD/TF Card DY1703A

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MINI ESP32-S3 Development Board BT 5.0 Wifi Module for Internet of Things RISC-V 23.5mm*18mm Low Power 18Pin 4M Flash ESP32 S3 

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USB to TTL Conversion Module USB 2.0 to RS485 Converter FT232RL Chip TVS Tube USB Self-recovery Protection 

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RT9400 POE PD Power Supply Module AF Standard 13W 5V Features： ·IEEE802.3af compliant ·Input voltage range 36V to 57V ·Integral high efficiency DC/DC converter. ·Low output ripple and noise ·High performance with low price ·Short-circuit protection ·Adjustable Output ·Optional multi-voltage output 3.3V 5V 12V 24V ·Transformer isolation  ,1500V isolation (input to output) ·Easy to use, with a minimum number of external components. Applications： ·IP Cameras ·Wireless access point ·Security and alarm systems ·VOIP telephone ·Point of sale network terminal equipment Description： The RT9400 series of modules are designed to extract power from a conventional twisted pair Category 5 Ethernet cable, conforming to the IEEE 802.3af Power-over-Ethernet(PoE) standard. The RT9400 signature and control circuit provides the PoE compatibility signature and power classification required by the Power Sourcing Equipment (PSE) before applying up to 15W power to the port. The RT9400  provides a Class 0 signature. The DC/DC converter operates over a wide input voltage range and provides a regulated output. The DC/DC converter also has built-in short-circuit output protection.

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MEGA2560 R3 Development Board MCU Module for Arduino Module Improved Version USB Type-C CH340G ATMEGA2560-16AU

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MINI ESP32-C3 Development Board 2.4G Wifi 4 BT Module with 0.42 Inch OLED Display 4MB Flash Ceramic Antenna USB Type-C ESP32 C3  

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USB to TTL FT232RL Conversion Module USB Transform Serial Adapter Download Converter TYPE-C Port 3.3V 5V 6Pin  

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LM-2596 Multi-Circuit Switching Power Supplies Module 3.3V 5V 12V ADJ Adjustable Voltage Output Power Modules LM2596

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WT32-ETH01 Embedded ESP-32 Wifi BT Module Serial to Ethernet Transmission Wireless Module ESP32-32 WT32 ETH01

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BT 4.1 Audio Emitter Transmitter Module Board Stereo Sound Frequency Emission USB Sound Card to BT Module

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ESP32-WROVER-DEV Development Board 2.4G Wifi BT Module 4MB Flash 4M PSRAM Support OV2640 OV7670 Camera Modules ESP32 CAM CH340C

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ESP-02S Serial Wireless 2.4G Wifi Module Transceiver for Smart Home Industrial IoT 1Mbit Compatible ESP8266 ESP 02S

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38Pin ESP32S V1.3 Developments Board for Internet of Things Smart Home Wireless 2.4G WiFi Bluetooth with IPEX Port ESP32-S CH340

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LD2450 24GHz Human Motion Trajectory Tracking Sensor FMCW Wave Radar Induction Module Target Positioning 6M ASCII Output

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ESP8266-12F WIFI Module for Internet of Things Development Board Serial 22Pin WIFI ESP8266 12F

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ESP32 S3 N16R8 Development Board with 1.54 Inch TFT Display Speaker Expansion Adapter Kit for DIY AI Type-C Wifi Module ESP32-S3

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8 Bit WS2812 RGB Light Ring Development Board 5050 Smart Full-Colour RGB LED Learning Module DC4-7V

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ESP32-S3 N16R8 2.4G Extend Wifi BT Module with Dual-Core Low Power MCU Internet of Things 8MB PSRAM 16MB Flash ESP32-S3WROOM-1  

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2.4G WIFI Bluetooth Module Development Board 30Pin 38Pin Micro Type-C ESP-32 Ultra-Low Power Consumption Dual Core CP2102

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MINI ESP32-S3 Development Board for Arduino 2.4G Wifi BT Module Original Chip ESP32-S3FN8 8MB Flash 28Pin Type-C ESP32S3

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About ESP32 Breakout Board： Wide Compatibility: The breakout board is only fit for 38PIN narrow version ESP32 without mounting holes.Notice:Don't fit with the ESP-WROOM-32 DevKit V1 version.Please confirm your esp32 board pins width is coincide with the pin width of the breakout board 30Pins ref asin: B08D5ZD528; 38pins ref asin: B09DPH1KXF and B09DPGMZR9 . IMPORTANT: ESP32 Breakout Board GPIO 1 into 2 only can Compatible with 38 Pins ESP32S ESP32 ,that is to say just for ref asin: B09DPH1KXF and B09DPGMZR9 This module is safe, reliable, and scalable to a variety of applications. The expansion board is design with double-layer that One pin is wired on both sides. Stable and highly reliable.Great contact and stable signal transmission for your esp32 board AITRIP breakout board can expand one GPIO pin of ESP32 development board to two, which is very nice for you to reuse all pins , it is a good tool for your smart home projects. Nice breadboard alternative The ESP32 Breakout Board can expand one GPIO pin of esp32 development board to two.Perfect for users to reuse all pins in smart home DIY projects.Excellent breakout board Product Description: Specifications: Size: 7.8 * 6.3 * 1cm PCB material: high quality FR-4 material PCB layers: 2 layers PCB thickness: 1.6mm Pads: tin plated Note: Just suitable for 38 Pins ESP32 development board .Our Reference Asin : B09DPH1KXF and B09DPGMZR9 ,not suitable for others versions . This module is safe and reliable and can be extended to various applications. The module has 38 pins and has more functions than the 30-pin module. Narrower width, compatible with circuit boards Support Lua program, easy to develop. Three modes are supported: AP, STA and AP+STA. The board features a 2.4 GHz dual-mode Wi-Fi and Bluetooth chip, the ESP-WROOM-32, and 40-nanometer low-power technology. 1. ESP32 breakout board GP10 1 into 2 for 38P IN narrow ESP32 ESP32 ESP--WROOM--32 microcontroller development board Important Note: Only compatible with 38-pin narrow hole and no mounting hole version esp32 development board, not suitable for other versions. GPI0 1 INTO 2: This breakout board can expand one GPI0 pin of esp32 development board to 2, which is convenient for users to reuse all pins in smart home projects. Nice breadboard alternative. 2. Types of connections: pin headers and screw terminals. Just choose them according to your purpose. Double-layer PCB: The expansion board is a double-layer board. One pin is connected on both sides. Therefore, the circuit is stable and reliable, and there will be no poor circuit contact and unstable signal transmission. Updated version: Compared to the previous version, the board is fully soldered in this version. No need to weld parts by yourself, very convenient to use ------------------------------------------------- About ESP8266 Breakout Board： For ESP8266 ESP-12E: It is fully compatible with ESP8266 ESP-12E. GPIO 1 into 2: This expansion board can expand one GPIO pin of Development Board to two, which is convenient for users to reuse pins for large-scale smart home projects. 2 Type Connections: Two connection methods: Pin Header Connector & Screw Terminal. Just select them according to your purpose. Double-Layer PCB: The expansion board is a double-layer board. One pin is wired on both sides. Therefore, the circuit is stable and highly reliable, and there will be no poor circuit contact and unstable signal transmission. Updated Version: Compared with the previous version, the board of this version has been soldered completely. No need to solder parts by yourself, which is very convenient to use. Product Description It is fully compatible with the ESP8266 ESP-12E development board. It can expand one GPIO pin on the development board to two, which greatly facilitates usersto reuse pins for large-scale smart home projects. Specifications: PCB material: high quality FR-4 material PCB layers: 2 layers PCB thickness: 1.6mm Pads: tin plated Size: 6.35 * 6.3 * 1cm

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ESP32 C3 Development Board Mini Wifi BT Module RISC-V 32-Bit Single-Core Processor Type-C ESP32-C3 16Pin If external power supply is required, just connect the + level of the external power supply to the position of 5V, GND connects to the negative terminal. (Support 3.3 ~ 6V power supply). Remember that when connecting the external power supply, you cannot access USB, USB and external power supply can only choose one. Enter the download mode: Hold down the BOOT button of the ESP32C3, press the RESET button, release the RESET button, and then release the BOOT button. Then the ESP32C3 will enter the download mode. (Each connection needs to re-enter the download mode, sometimes press once, the port instability will be disconnected, you can judge by the port identification sound)

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ESP-01S Wifi Module Low Power Consumption 8Pin Serial Port to WIFI Module Wireless ESP01S Development Board ESP 01S ESP8266

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GY BMP280 3.3V GY BMP280 5V Description: Thanks to Bosch, now we've got a high-precision environmental sensor at even lower cost,  Barometer Sensor(BMP280). It is based on their new BMP280 sensor, which is an upgraded version of the old BMP180 Barometer Sensor (BMP180). The module provides precise measurement of barometric pressure and temperature in the environment. The air pressure can be measured in a range from 300 hPa to 1100hPa with ±1.0 hPa absolute accuracy. As for the temperature the sensor works perfectly for temperatures between - 40 and 85 with an accuracy of ±1. Owing to its high accuracy on measuring the pressure, and the pressure changes with altitude, we can calculate the altitude with ±1 meter accuracy, which makes it a precise altimeter as well. Another great thing about this module is that, you don't even need to worry about the I2C collisions as it provides both I2C and SPI interfaces. To use SPI, simply de-solder the bonding pads on the back. If you go with I2C, the board also provides 2 I2C addresses for you to select as you want. Note: As the sensor is quite sensitive to the environmental conditions, please DO NOT touch it with your fingers. Features: High accuracy, absolute accuracy of ±1.0 hPa for pressure measurement and ±1 accuracy for temperature measurement Supports both I2C and SPI communication Can be used as an altimeter with accuracy of ±1 meter Specification: Supply Voltage: 5V Current Consumption: 0.6 mA Barometric Pressure Measure • Range: 300 - 1100 hPa • Accuracy: ±1.0 hPa Temperature Measurement • Range: -40 to 85 • Accuracy: ±1 Interface: I2C and SPI

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ESP32 CAM with OV2640 Camera Module Kit 66 120 160 Degrees 650nm 850nm Night Vision DVP 24Pin 2MP 2.4GHz WiFi Camera 4MB FLASH NEW ESP32-CAM is a branch version of ESP32-CAM, which cancels the download circuit, increases the TF card slot while maintaining the same size, and leads out 2*9PIN 2.54 pin headers and download interface, which reduces the cost and expands its functionality. , which is very suitable to exist as a component in the project to complete the camera function. Adopt ESP32 low power consumption scheme, integrate wifi and bluetooth, the module can run independently as the smallest system, the module is equipped with OV2640 camera by default, onboard TF card slot, supports up to 16GB TF card, with the powerful performance of ESP32, in VGA format Up to 30 FPS. Applicable to various Internet of Things and smart device occasions. MCU : ESP32-D0WDQ6 The frequency can be adjusted between 80-240MHz, integrated 2.4 GHz Wi-Fi and Bluetooth dual-mode, 40nm process, with ultra-high RF performance, stability, versatility and reliability, and ultra-low power consumption, to meet different requirements The power consumption requirement is suitable for various application scenarios. CMOS : OV2640 Camera Provides the full functionality of a single-chip JXGA (1632x1232) camera and image processor, providing full-frame sampling, zoomed or windowed 8-bit/10-bit images in multiple formats via the Serial Camera Control Bus (SCCB) interface. The best image distance is 20-250CM. Extensibility The module expands out the 2*9Pin 2.54 pin header interface and the 1*6 download pin header interface, making it rich in expansibility. Users can use it as a core board to independently design external circuits to better play. out the powerful performance of ESP32. TF card slot The module has a TF card slot on the board, which is compatible with most standard TF cards on the market, up to 16GB. With the camera, it can realize functions such as photo storage and review. Module application scenarios DIY secondary development, low-cost camera solutions, IoT node equipment.

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4PCS 50kg Human Scale Load Cell Weight Sensor + HX711 AD Module Body Load Cell Weighing Pressure Sensor Measurement Tools * This load sensor, sometimes called a strain gauge, is the same one found in digital bathroom scales. * The sensor is a group of half-bridge strain gauge Name: 4Pcs 50KG Human Scale Load Cell Weight Sensors + HX711 Module Material: Plastic,Metal Ways to use it : - Use one sensor with an external resistor to form a full-bridge measurement, the range of a sensor range: 50kg. External resistance on the higher requirements. - Use two sensors to form a full-bridge measurement, measuring range for the sum of the two sensors: 50kgx2 = 100kg - Use four sensors to form a full-bridge measurement, measuring range for the sum of four sensors: 50kgx4 = 200kg 4PCS with HX711 AD Included 4x 50kg Human Scale Load Cell 1x HX711 AD weighing module 1x 10Pin Needle Note: - Please allow slight error due to manual measurement. Please make sure you do not mind before you bid. - The colors may have difference due to different display. Thank you for your understanding!

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NEW FC3379 USB Main Control Board with Type-C BGA316 132 272 TPC BB5 QFN48 4CE Dual-mount DIY USB Flash Drive PCB Module USB3.0

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USB Main Control Board for USF 2.0 2.1 Chip High Speed USB 3.1 Type-C Dual Interface BGA153 Solder JMS901

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LD2410C 24GHz Human Presence Sensor FMCW Wave Radar Induction Module Body Heartbeat Detection Sensors High Accuracy The LD2410C is a highly sensitive 24GHz human presence sensing module. It works by using FMCW FM continuous wave to detect human targets in a set space combined with radar signal processing and accurate human sensing algorithms to achieve high sensitivity human presence sensing, recognising both moving and stationary human bodies and calculating auxiliary information such as the distance to the target. The product is mainly used in indoor scenarios, sensing the presence of moving or slightly moving bodies in the area and outputting the results in real time. A configuration tool is available to configure the range of sensing distances, the sensitivity of different zones and the unmanned delay time. Supports GPIO and UART outputs for plug-and-play applications in a variety of smart scenarios and end products. Product Parameters: Frequency: 24G-24.25GHz Modulation method: FMCW Detection distance: 0.75~6m Adjustable Detection angle: ±60 Power supply:5V Current:~79mA Output serial level: 3.3V Sweeping band width: 250MHz (CE/FCC compliant) Ambient temperature: -40°C to +85°C Data format: Serial ASCII output/High/Low level 3.3V & OV Package Type: Default with pins, customizable with or without pins

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for AJ-SR04M Ultrasonic Ranging Sensor Module Waterproof with 2.5M Cable Probe Distance Measuring Sensor for Arduino 20-450CM Overview: : for AJ-SR04 module is an ultrasonic probe designed with integrated waterproof ultrasonic probe Wave ranging module. 20cm to 450cm ranging range, mode 1 is compatible with HC-SR04 software, can Provide 10uA standby current, 3-5V wide voltage operation. Replacing the low aftershock probe can achieve The farthest ranging up to 6-7M. Features: 1, 3-5V power supply 2, Waterproof, can work in harsh environment 3, 10uA ultra-low standby current 4, 5 output modes 5, 20cm minimum blind spot 6, Ultra-wide measurement range of 20cm-450cm (measurement of flat walls) 7, high resolution 8, Working temperature: -20℃-80℃ Application areas: 1, Intelligent car ranging and obstacle avoidance 2, object distance measurement, body height measurement 3, Four-axis height-fixing and obstacle avoidance 4, intelligent traffic control, parking space display Interface definition: Pin1: 5V 3-5V power supply Pin2: Trig/Rx GPIO mode is Trig, trigger signal. Serial port mode receive: Rx. Pin3: Echo/Tx GPIO mode is Echo, feedback signal. Serial port mode transmit: Tx. Pin4: Gnd ground

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Human Presence Sensor Module 24GHz Smart Millimeter Wave Radar Sensing Heartbeat Detection Module with BT HLK-LD2410B

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LD2420 Radar Module Human Motion Sensor Module 24GHz Support GPIO UART Interface Low Power Smart Sensor 5PIN

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ESP32-S3 Development Board Kit for AI Voice Interaction with 192kHz Microphone Speaker BT Wifi Module N16R8 DIY GPIO SPI ES8388

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ESP-32 30Pin Developments Board Wireless WiFi Bluetooth 2 in 1 Dual Core CPU Low Power Consumption ESP-WROOM-32 CH340C Type C

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ESP-32 38PIN Expansion Board with CP2102 38PIN Type-C Micro Development Board 2.4G WIFI Bluetooth Modules Low Power Dual Core

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ESP-32 CAM Development Board  OV2640 Camera Module Extend 2.4G IPEX Antenna 8MB Flash 8MB PSRAM TF Slot Battery Port ESP32-S

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RP2040-Zero RP2040 for Raspberry Pi Microcontroller PICO Development Board Module Dual-core 264K 2MB Flash 133MHz

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