DC Rectangle Gear motor 12V 300 RPM with High Torque The DC Rectangle Gear Motor 12V 300 RPM with High Torque, also known as a square gear motor, is a compact and powerful motor designed for applications that require both speed and torque. This 300 RPM gear motor operates at 12V and delivers high torque output, making it ideal for robotics, conveyor belts, automation systems, and other mechanical projects. Its rectangular gearbox provides durability and easy mounting, making it a reliable choice for hobbyists and professionals alike. As a DC gear motor, it ensures stable performance and long operational life even under demanding loads. Applications: Pan/ Tilt camera Auto shutter Welding machines Water meter IC Card Grill Oven Cleaning machine Garbage disposers

Decade Counter IC - 74HC90 The 74HC Series 74HC90 Decade Counter IC having 4.75 to 5.25V Supply Voltage with 8mA Low Level and - 0.4mA High-Level Output Current. It is a simple counter, it can count from 0 to 9 cyclically in its natural mode. It counts the input pulses and the output is received as a 4-bit binary number through pins QA, QB, QC, and QD. The binary output is reset to 0000 at every tenth pulse and the count starts from 0 again. Used For Power amplifiers, Small-signal amplifiers, Operational amplifiers, Microwave amplifiers, RF and IF amplifiers, Voltage comparators, Multiplier. Pinout: Pinout of 74HC90 IC

Decade Counter/Divider IC - CD4026 The CD4x Series CD4026 consists of a 5-stage Johnson decade counter and an output decoder that converts the Johnson code to a 7-segment decoded output for driving one stage in a numerical display. These devices are particularly advantageous in display applications where low power dissipation and /or low package count are important. Inputs common to both types are CLOCK, RESET, & CLOCK INHIBIT; common outputs are CARRY OUT and the seven decoded outputs (a, b, c, d, e, f, g). Additional inputs and outputs for the CD4026 include DISPLAY ENABLE input and DISPLAY ENABLE and UNGATED "C-SEGMENT" outputs. A high RESET signal clears the decade counter to its zero counts. The counter is advanced one count at the positive clock signal transition if the CLOCK INHIBIT signal is low. Counter advancement via the clock line is inhibited when the CLOCK INHIBIT signal is high. The CLOCK INHIBIT signal can be used as a negative-edge clock if the clock line is held high. Antilock gating is provided on the JOHNSON counter, thus assuring proper counting sequence. The CARRY-OUT (C out ) signal completes one cycle every ten CLOCK INPUT cycles and is used to clock the succeeding decade directly in a multi-decade counting chain. The seven decoded outputs (a, b, c, d, e, f, g) illuminate the proper segments in a seven-segment display device used for representing the decimal numbers 0 to 9. The CD4026  outputs go high only when the DISPLAY ENABLE IN is high. The CD4026 series type is supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (NSR suffix), and 16-lead thin shrink small-outline packages (PW and PWR suffixes). check out : CD4033 - 5-Stage Johnson Decade counter IC Pinout: Pinout of CD4026 Decade IC Applications: Decade counting 7-segment decimal display Frequency division 7-segment decimal displays Clocks, watches, timers (e.g. ÷60, ÷60, ÷ 12 counter/display) Counter/display driver for meter applications

Decade Up/Down Counter with Clear IC - 74HC192 The 74HC Series 74HC192 IC is an asynchronously presettable BCD Decade and Binary Up/Down synchronous counters, respectively. Presetting the counter to the number on the preset data inputs (P0-P3) is accomplished by a LOW asynchronous parallel load input (PL)\. The counter is incremented on the low-to-high transition of the Clock-Up input (and a high level on the Clock-Down input) and decremented on the low-to-high transition of the Clock-Down input (and a high level on the Clock-up input). check out : 4-Bit Binary Ripple Counter IC - 74HC93 A high level of the MR input overrides any other input to clear the counter to its zero state. The Terminal Count up (carry) goes low half a clock period before the zero counts are reached and returns to a high level at the zero counts. The Terminal Count Down (borrow) in the count down mode likewise goes low half a clock period before the maximum count (9 in the 192) and returns to high at the maximum count. Cascading is effected by connecting the carry and borrow outputs of a less significant counter to the Clock-Up and CLock-Down inputs, respectively, of the next most significant counter. check out : CD4029 - Binary Decade Up-Down Counter IC Pinout: Pinout Of 74HC192 IC check out : ? Binary Up/Down Counter with Clear IC - 74HC193

Decimal to BCD Priority Encoder IC - 74HC147 The 74HC Series 74HC147 are high-speed silicon-gate CMOS devices and are pin-compatible with low-power Schottky TTL (LSTTL). The 74HC147 9-input priority encoders accept data from nine active LOW inputs (l1 to l9) and provide binary representation on the four active LOW inputs (Y0 to Y3). A priority is assigned to each input so that when two or more inputs are simultaneously active, the input with the highest priority is represented on the output, with the input l9 line having the highest priority. These devices provide the 10-line to 4-line priority encoding function by use of the implied decimal “zero”. The “zero” is encoded when all nine data inputs are HIGH, forcing all four outputs HIGH. Pinout: Pinout Of 74HC147 IC

Desoldering Wick Desoldering wick, also known as desolder braid, is a handy tool made up of braided copper threads. Its purpose? To make desoldering faster and cleaner. When used in conjunction with a heated soldering iron, it works wonders in removing soldered joints. One of the great things about desoldering wick is its ability to effectively tackle solder that has gone astray. You see, sometimes solder ends up where it shouldn't be, like on a jumper or another unintended spot. That's where flux comes into play. By adding flux to the equation, it helps the solder flow away from its unwanted location and onto the wick, making the cleanup process much easier. It's amazing how versatile soldering can be. With the right tools, like solder wick, you can tackle a wide range of soldering tasks. So whether you're working on electronics or other projects that require precision soldering, having a roll of desoldering wick at your disposal is a smart move. It makes the desoldering process a breeze and ensures that your work is tidy and efficient.

DFRobot 3m SC-SC Single Mode Duplex Fiber Optic Jumper Cable The DFRobot 3m SC-SC Single Mode Duplex Fiber Optic Jumper Cable is designed for high-performance and long-distance data transmission. This 3mm diameter, 3-meter cable features a dual-core single-mode fiber, ensuring efficient propagation of light over long distances. Equipped with ceramic ferrule SC-type connectors and a protective shell, it offers low insertion loss, excellent repeatability, and high interchangeability. The cable also boasts a large return loss, tensile resistance, and outstanding durability, making it ideal for reliable and consistent performance in demanding environments. With its strong pull tension resistance, this fiber optic jumper is perfect for use in optical fiber communication systems, local area networks (LANs), fiber access networks, and other data transmission applications. Features Reduces signal degradation for efficient data transmission. Ensures reliable performance with consistent signal quality. Allows easy swapping between devices without loss in performance. Minimizes signal reflections, improving system stability. Withstands mechanical stress for long-lasting durability. Designed for high-efficiency data transmission in demanding environments. Applications Optical fiber communication systems Fiber optic access networks High-speed fiber data transmission Local area networks (LANs) and other related applications

DFRobot A01NYUB Waterproof Ultrasonic Distance Sensor (28-750cm Detection Range) The A01NYUB Waterproof Ultrasonic Sensor is a very useful device for finding out how far away something is, and it’s built tough for outdoor or wet places. It can measure distances from as close as 28cm to as far as 7.5 meters! Because it's fully sealed (that's what IP67 means), you don't need to worry about rain, splashes, or dust getting inside and spoiling it. This sensor is designed to be a dependable Long Range IP67 Sensor that can still give good readings even if the air is a bit smoky or dusty. Connecting this 750cm Ultrasonic Sensor to your project is easy because it talks using a standard UART serial connection, which is something most popular microcontrollers like Arduino or Raspberry Pi can understand without any fuss. The UART Ultrasonic Distance Sensor works by sending out a sound pulse (that humans can't hear) and then listens for the echo to come back, calculating the distance accurately. Dimensions Features Measuring Range: 28cm to 750cm (for flat objects). Waterproof Level: IP67 (totally protected from dust and water). Communication Type: UART (serial output). Works With: 3.3V to 5V power supply. Power Use: Very low, average current is less than 15mA. Response Time: Quick, around 100 milliseconds. Viewing Angle: About 55 degrees (with the bell-mouth attachment). A01NYUB Ultrasonic Distance Sensor with Arduino Circuit Diagram A01NYUB Ultrasonic Distance Sensor with Raspberry Pi Circuit Diagram

DFRobot A02YYUW Waterproof Ultrasonic Distance Sensor - 3-450cm Detecting Range The A02YYUW Waterproof Ultrasonic Distance Sensor is a reliable solution for distance measurement in challenging environments where water and dust protection is essential. With its IP67 waterproof rating, this sensor can be safely used outdoors, in industrial settings, or any application exposed to moisture and dust. The sensor offers an impressive detection range from 3cm to 450cm with a resolution of 1mm, making it suitable for various distance measurement projects from short-range obstacle detection to long-range monitoring. The integrated UART communication interface allows for simple connection to Arduino, Raspberry Pi, or other microcontroller platforms without complex wiring or additional components. This ultrasonic sensor features a compact design with a pre-attached 1-meter waterproof cable, allowing for easy installation in tight spaces or remote locations. The sensor operates on a wide voltage range from 3.3V to 5.5V DC and consumes only 10mA during operation, making it ideal for battery-powered projects. With a blind zone of just 3cm, the A02YYUW can detect objects at very close range, which is particularly useful in robotics and automation applications. The sensor's temperature compensation feature ensures consistent performance across varying environmental conditions, while its narrow 15° beam angle provides focused detection for accurate measurements. Whether you're building a water level monitor, parking assistant, or industrial automation system, this waterproof ultrasonic sensor delivers reliable performance in demanding conditions. Beam Directionalities Diagram Features Detection range: 3cm to 450cm with 1mm resolution Communication: UART interface (9600 baud rate) Waterproof rating: IP67 for complete dust protection and water immersion Operating voltage: 3.3V to 5.5V DC Current consumption: 10mA during operation, 3.5mA in standby Operating temperature: -15°C to 60°C Beam angle: 15° for focused detection Connection Diagram with Arduino Connection Diagram with Raspberry Pi Dimensions

DFRobot Fermion MEMS Methane CH4 Gas Sensor (Breakout, 1-10000ppm) The DFRobot Fermion MEMS Methane CH4 Gas Sensor is a compact and energy-efficient breakout board designed to detect methane concentrations from 1 to 10,000ppm. Powered by advanced MEMS technology, it features ultra-low power consumption (<20mA), minimal heat generation, and a fast response time. Its small size (13x13x2.5mm) makes it perfect for integration into gas leak detectors, safety systems, and environmental monitoring devices. Ideal for fire prevention and combustible gas detection, this sensor is part of a versatile MEMS series supporting multiple gas types for customizable sensing solutions. DFRobot Methane CH4 Gas Sensor Interfacing with Arduino Circuit Diagram Precautions for Use Remove the protective film before using the sensor. Avoid exposure to volatile silicon compounds (e.g., silicone adhesives, hair gels, silicone rubber). Do not expose the sensor to high concentrations of corrosive gases (e.g., H?S, SO?, Cl?, HCl). Prevent contamination from alkalis, alkali metal salts, and halogens. Avoid prolonged exposure to extreme environments (high temperature, humidity, or pollution). Keep the sensor away from water, condensation, and freezing conditions. Minimize mechanical stress—avoid strong vibration, impact, or dropping. Do not use this sensor in systems where failure could affect personal safety. If unused for a long time, preheat the sensor for at least 24 hours before reuse. Features Compact size: only 13 × 13 × 2.5mm, ideal for space-constrained applications Low power consumption: operating current less than 20mA High sensitivity with fast response and quick recovery time Built using advanced MEMS (Micro-Electromechanical Systems) technology Applications Health applications Fire detection Industrial safety Environmental monitoring Indoor air quality