Sensors

SOP-4-2.54mm Transistor, Photovoltaic Output Optoisolators ROHS PC817C-S SOP-4_L6.5-W4.6-P2.54-LS10.3-TL LCSC Part Number: C3008369 JLCPCB Part Class: Extended Part Manufactured by UMW(友台半导体) The ESDA18-1K is a transient voltage suppression and electrostatic discharge protection device designed to protect sensitive electronic circuits from ESD events, surge transients, and electrical overstress conditions. Manufactured by STMicroelectronics and commonly used in communication and embedded electronic systems, this device provides fast-response protection for signal lines and low-voltage interfaces exposed to external electrical disturbances. The component utilizes low-capacitance TVS diode technology to clamp transient voltages while maintaining signal integrity on high-speed communication lines. It is optimized for protecting USB interfaces, GPIO lines, communication ports, sensor interfaces, and portable electronic devices from electrostatic discharge damage and transient spikes. The ESDA18-1K is widely used in industrial electronics, consumer devices, embedded systems, communication hardware, and portable equipment requiring compact and reliable ESD suppression. Its small surface-mount package enables easy integration into high-density PCB layouts while improving overall system reliability and EMC robustness. Engineering Specification Device Type Transient voltage suppression and ESD protection diode Protection Function Electrostatic discharge and surge transient suppression Protection Architecture Single-line TVS protection structure Response Characteristics Fast transient clamping response Signal Compatibility Suitable for low-voltage and high-speed signal interfaces Capacitance Characteristics Low capacitance for minimal signal distortion Electrical Performance Low leakage current and stable clamping behavior Reliability Features High ESD robustness and transient tolerance Mounting Style Surface mount technology Package Type Compact SOD-style surface-mount package Thermal Characteristics Low-power passive protection structure EMC Features Enhanced electromagnetic compatibility protection support Applications USB interface protection GPIO protection Communication interfaces Embedded systems Portable electronics Industrial control hardware Sensor interfaces Consumer electronics Signal line protection Data communication systems Manufacturer STMicroelectronics #commonpartslibrary #esdprotection #tvsdiode #transientprotection #signalprotection #stmicroelectronics #embeddedhardware #electronicsdesign

Accelerometer X, Y, Z Axis ±2g, 4g, 8g, 16g 0.05Hz ~ 1.6kHz 14-LGA (3x5) The ADXL345 is a small, thin, ultralow power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface. The ADXL345 is well suited for mobile device applications. It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (3.9 mg/LSB) enables measurement of inclination changes less than 1.0°. Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion by comparing the acceleration on any axis with user-set thresholds. Tap sensing detects single and double taps in any direction. Free-fall sensing detects if the device is falling. These functions can be mapped individually to either of two interrupt output pins. An integrated memory management system with a 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor activity and lower overall system power consumption. Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation. The ADXL345 is supplied in a small, thin, 3 mm × 5 mm × 1 mm, 14-lead, plastic package. ► Ultralow power: as low as 23 µA in measurement mode and 0.1 µA in standby mode at VS = 2.5 V (typical) ► Power consumption scales automatically with bandwidth ► User-selectable resolution ► Fixed 10-bit resolution ► Full resolution, where resolution increases with g range, up to 13-bit resolution at ±16 g (maintaining 4 mg/LSB scale factor in all g ranges) ► Embedded memory management system with FIFO technology minimizes host processor load ► Single tap/double tap detection ► Activity/inactivity monitoring ► Free-fall detection ► Supply voltage range: 2.0 V to 3.6 V ► I/O voltage range: 1.7 V to VS ► SPI (3- and 4-wire) and I2C digital interfaces ► Flexible interrupt modes mappable to either interrupt pin ► Measurement ranges selectable via serial command ► Bandwidth selectable via serial command ► Wide temperature range (−40°C to +85°C) ► 10,000 g shock survival ► Pb free/RoHS compliant #commonpartslibrary #sensor #transducer #accelerometer

ADXL345 iMEMS® Accelerometer, 3 Axis Sensor Evaluation Board The ADXL345 measures acceleration in three axes (X, Y, Z) and outputs digital data via either I²C or SPI interfaces. It is widely used in applications like tilt sensing, vibration monitoring, free-fall detection, and motion-based user interfaces. Its high resolution (up to 13-bit) allows it to detect very small changes in motion, making it suitable for both consumer electronics and industrial applications. Key Features 3-axis acceleration measurement (X, Y, Z) Selectable measurement ranges: ±2g, ±4g, ±8g, ±16g High resolution (13-bit) with up to 4 mg/LSB sensitivity Digital output interfaces: I²C and SPI Low power consumption: ideal for battery-powered devices Built-in motion detection functions: Tap and double-tap detection Free-fall detection Activity and inactivity monitoring Wide bandwidth range: supports various data rates for different applications Operating voltage: typically 2.0V to 3.6V Compact package: small LGA form factor suitable for space-constrained designs Common Applications Smartphones and tablets (screen rotation, motion sensing) Wearable devices and fitness trackers Gaming controllers Robotics and drones Vibration and shock monitoring systems #commonpartslibrary #developmentboard #evaluationboard #sensor

Bipolar (BJT) Transistor NPN 40V 200mA 300MHz 350mW Surface Mount SOT-23 The MMBT3904-TP is an NPN general-purpose bipolar junction transistor (BJT) in a SOT-23 surface-mount package. It is a compact SMD version of the classic 2N3904, designed for switching and low-power signal amplification in a wide range of electronic circuits. It is commonly used in embedded systems, consumer electronics, and PCB designs where small size and reliable switching performance are required. Key Features NPN Bipolar Junction Transistor (BJT) Suitable for switching and amplification applications SOT-23 Surface-Mount Package Compact footprint for high-density PCB designs Collector-Emitter Voltage (Vceo) Typically up to 40V Collector Current Up to 200 mA continuous Low Power Operation Designed for small signal and low-power switching tasks High Gain (hFE) DC current gain typically 100–300 Fast Switching Capability Suitable for digital and pulse applications Wide Operating Temperature Range Typically -55°C to +150°C High Reliability Stable performance for general-purpose use RoHS Compliant Environmentally compliant manufacturing Typical Applications Signal switching in digital circuits LED driving circuits Small relay or load switching Sensor interface circuits General-purpose amplification stages 2N3904 SOT-23 #CommonPartsLibrary #Transistor #BJT #NPN #MMBT3904

Humidity Temperature Sensor 0 ~ 100% RH I²C ±2% RH 8s Surface Mount #commonpartslibrary #sensor #Humiditysensor #integratedcircuit

PIC PIC® 16F Microcontroller IC 8-Bit 20MHz 14KB (8K x 14) FLASH 40-PDIP The PIC16F877A-I/P is a high-performance 8-bit microcontroller from Microchip Technology, based on a Harvard architecture with separate program and data memory buses. It is designed for a wide range of embedded applications requiring reliable processing, multiple communication interfaces, and analog capability. The device integrates Flash program memory, EEPROM data storage, and numerous peripherals including ADC, timers, serial communication modules, and PWM functions. Packaged in a 40-pin PDIP form factor, it is widely used in industrial automation, consumer electronics, and educational development systems. Core Features 8-bit PIC microcontroller architecture Harvard architecture with RISC instruction set Operating frequency up to 20 MHz Single-cycle instruction execution (except branches) Memory Program Memory: 8K words (Flash) Data Memory (RAM): 368 bytes EEPROM Data Memory: 256 bytes I/O Features Up to 33 programmable I/O pins Multiple input/output ports (PORTA, PORTB, PORTC, PORTD, PORTE) High current sink/source capability on selected pins Analog Features 10-bit Analog-to-Digital Converter (ADC) Up to 8 analog input channels Programmable voltage reference Timers and Control Three timers (Timer0, Timer1, Timer2) Capture/Compare/PWM (CCP) modules Watchdog Timer (WDT) Power-on Reset (POR) and Brown-out Reset (BOR) Communication Interfaces USART (Universal Synchronous/Asynchronous Receiver/Transmitter) SPI (Serial Peripheral Interface) I²C (Inter-Integrated Circuit) via MSSP module Electrical Characteristics Operating Voltage: 4.0V to 5.5V Operating Temperature Range: -40°C to +85°C (Industrial grade) Low power consumption modes available Package Information Package Type: PDIP (Plastic Dual Inline Package) Pin Count: 40 pins Mounting Type: Through-hole Applications Industrial control systems Embedded automation Consumer electronics Sensor interfacing and data acquisition Educational and prototyping platforms #commonpartslibrary #integratedcircuit #microcontroller

Oximeter/Heart Rate Sensor I²C Output #commonpartslibrary #sensor #integratedcircuit

Humidity Temperature Sensor 0 ~ 100% RH I²C, SPI ±3% 1s Surface Mount #commonpartslibrary #sensor #integratedcircuit

Temperature Sensor Analog, Local -40°C ~ 125°C 10mV/°C TO-92-3 #commonpartslibrary #sensor #transducer #analog

MQ-2 is a smoke and combustible gas sensor from Winsen. It can detect flammable gas in a range of 300 - 10000ppm. It's most common use is domestic gas leakage alarms and detectors with a high sensitivity to propane and smoke. The sensing material is SNO₂ for which the conductivity is lower in clean environments and higher when smoke or flammable gas is present. #commonpartslibrary #sensor #gassensor #integratedcircuit