4 Channel Relay Wireless Module This is a 4 channel relay module which can be controlled by a wireless remote through a wireless RF link. The wireless board can operate within a range of 50m when the remote is in line of sight and around 25m when indoors. The RF link on this board works on the 433 MHz frequency. How to link the 4 channel relay with remote? To link the remote and relay, power relay board, hold down the button for about 1 second to learn to let go. Learn indicator light flashes, press the button on the remote control to learn indicator light flashes after a few off, both represent learning success. Features: Control: Allows wireless control of up to four separate electrical devices or appliances. Communication: Based on the ESP-12F module, which uses the ESP8266 chip for Wi-Fi connectivity. Voltage: Operates on a DC 12V power supply. Output: Each relay can handle loads up to 10A. Indicators: Includes LEDs for power and relay status indication. Mounting: Features mounting holes for easy installation. Modes: Supports two working modes - direct connection to a cellphone or connection via a router. Additional Function: The ESP-01 can work as a microcontroller when disconnected from the relay module. Applications: Home Automation: Control lights, fans, and other appliances remotely. Security Systems: Manage security devices like alarms and cameras wirelessly. Remote Monitoring: Monitor and control devices from a distance, ideal for industrial and agricultural applications. Smart Home Projects: Integrate with smart home systems for automated control. Robotics: Use in robotic projects to control multiple actuators or motors. IoT Projects: Suitable for Internet of Things applications, enabling remote device management. Wireless Control: Operate devices like garage doors, gates, and other remote-controlled systems.

4 Channel Solid State Relay 4-Channel Solid-State Relay is somewhat similar to that of a mechanical relay & the difference is that there is no moving contact in a Solid-State Relay. Here we make use of a Phototrriac coupler to turn it ON and OFF. It finds its application in AC circuits as a TRIAC has got only limited applications in DC. This module is ideally suited to controlling larger voltages with the project. This is a 4 channel relay module that can be used to activate up to 240V AC. This allows you to build in device control, operating lighting, or triggering systems when the module is triggered. With the labeled screw terminals it's easy to connect. Solid State Relay - Solid State Relay (SSR) has advantages such as more efficient switching speeds, more stable operation against electrical noise, longer service life, resistance to physical vibrations and resistance to moisture, which distinguish this type of relay from ordinary mechanical relays. These relays are preferred in places that require fast and precise operation such as computer peripherals, medical devices. Solid-state relays do have several advantages over mechanical relays. One such advantage is that they can be switched by a much lower voltage and at a much lower current than most mechanical relays. Also, because there are no moving contacts, solid-state relays can be switched much faster and for much longer periods without wearing out. This is a quad-channel relay module which can be used to activate up to four separate 240V AC. This allows you to build in device control, operating remote lights or triggering systems when the module is supplied the signal.The screw terminals are well labeled and definition of the units function is shown underneath. Also, read our blog on What is a Relay detailing how it works, relay contact types, and different types of relays and their application. Applications: Control outputs from programmable controllers and positioning controllers Office Automation, Home Automation

4 pieces 10 X 2 Cm Gear Motor Robot Wheel & 4 pieces 200 RPM Gear Motor This set includes four 200RPM geared motors and 10x2 cm wheels, ideal for robotics and all-terrain applications. These Center Shaft DC Gear Motors offer reliable performance with a 12V 200 RPM output and are easy to control with an Arduino using an L298N H-bridge module. The motors have a 3mm threaded shaft for quick attachment to wheels or other assemblies, plus a sturdy metal or plastic gearbox for heavy-duty use in robotics and industrial projects. Check out: 200 RPM GEAR MOTOR+10X4 WHEEL - SET OF 4 Note: Depending upon the Manufacturer given dimensions may vary in the range of ±5%.

4 pieces 7 X 2 Cm Gear Motor Robot Wheel & 4 pieces 200 RPM Gear Motor These are 200RPM geared motor and 7 x 2 cm wheel ( 4 sets). The geared motors are simple DC Motors featuring gears for the shaft for obtaining the optimal performance characteristics. They are known as Center Shaft DC Geared Motors because their shaft extends through the center of their gearbox assembly. These standard size DC gear Motors are very easy to use. Also, you don’t have to spend a lot of money to control motors with an Arduino or compatible board . TheL298N H-bridge module with onboard voltage regulator motor driver can be used with this motor that has a voltage of between 5 and 35V DC. This DC Motor of 12V 200 RPM can be used in all-terrain robots and a variety of robotic applications. These motors have a 3 mm threaded drill hole in the middle of the shaft thus making it simple to connect it to the wheels or any other mechanical assembly. Nut and threads on the shaft to easily connect and internally threaded shaft for easily connecting it to the wheels. These DC Geared motors with robust metal/Plastic gearbox for heavy-duty applications, and ideally suited for robotics and industrial applications. The 7 x 2 cm wheels are high quality wheels, they are easy to mount and durable.

4 pieces 7 X 4 Cm Gear Motor Robot Wheel & 4 pieces 200 RPM Gear Motor for Robotics Science Project These are 200RPM geared motor and 7 x 4 cm wheel ( 4 sets). The geared motors are simple DC Motors featuring gears for the shaft for obtaining the optimal performance characteristics. They are known as Center Shaft DC Geared Motors because their shaft extends through the center of their gearbox assembly. These standard size DC gear Motors are very easy to use. Also, you don’t have to spend a lot of money to control motors with an Arduino or compatible board . TheL298N H-bridge module with onboard voltage regulator motor driver can be used with this motor that has a voltage of between 5 and 35V DC. This DC Motor of 12V 200 RPM can be used in all-terrain robots and a variety of robotic applications. These motors have a 3 mm threaded drill hole in the middle of the shaft thus making it simple to connect it to the wheels or any other mechanical assembly. Nut and threads on the shaft to easily connect and internally threaded shaft for easily connecting it to the wheels. These DC Geared motors with robust metal/Plastic gearbox for heavy-duty applications, and ideally suited for robotics and industrial applications. The 7 x 4 cm wheels are high quality wheels, they are easy to mount and durable.

4 Pin Push Button Tactile Switch 12x12x15mm (Pack of 5) The 4 Pin Push Button Tactile Switch (12x12x15mm) is a dependable component designed for precise input control in electronic circuits. Its tall 15mm profile ensures comfortable actuation, while the tactile switch 4 pin configuration provides firm electrical and mechanical stability. Ideal for control panels, embedded systems, and industrial electronics, this push button switch offers consistent tactile feedback even in high-frequency switching applications. Its through-hole mounting design ensures durability and reliable performance, making it a must-have for hobbyists and professionals alike. Features: Extended Height: 15mm actuator for easy access and firm tactile feedback. Standard 4-pin design. Compatible with typical PCB layouts. THT Mounting Through-hole legs for a stronger and more durable board attachment. Voltage Rating: 12V DC (standard) Current Handling Suitable for 50 mA to 100 mA low-current circuits. Applications: OEM product development Industrial control panels Prototyping and testing equipment Consumer electronics having enlarged switch housings

4 Pin Push in Conductor The 4 Pin lever nuts connector is designed with a rated voltage of 400V and an impulse voltage of 4KV. The 4 pin lever nuts compact connector is manufactured with a modified nylon (PA66) and phosphor copper is used as a contact material.

4 Pin Tactile Push Button Switch 12X12X21mm (Pack of 5) The 12x12x21mm tactile switch 4 pin is a high-quality tactile push button switch designed for precision and reliability in various control systems. Its extended stem enhances accessibility, making it suitable for recessed panels or enclosed assemblies. Featuring a 4-pin through-hole design and momentary tactile actuation, this switch provides consistent feedback and dependable operation. Commonly used in OEM assemblies, automation setups, and test rigs, it’s an excellent choice for engineers and hobbyists building custom industrial or electronic projects. Features: 21mm actuator height allows for easy operation in deep or enclosed installations. Standard 12x12mm base. Compatible with standard PCB and control panel configurations. 4-Pin THT Design Offers Solid Solder Joints for Mechanical Stability Momentary Tactile Feedback Ideal for push applications with a short response time. Voltage and Current Rating Operates @ 12V DC, up to 100mA Applications: OEM appliance controls. Testing and calibration equipment Audio and visual hardware interfaces Control consoles and automation panels Prototyping and embedded system development.

4 Way Slide Switch 2.54mm Pitch (Pack of 2) 4 Way DIP switches for reliable operation by secure snap-in.  DIP Switch Used on a printed circuit board along with other electronic components and is commonly used to customize the behavior of an electronic device for specific situations. Widely used in data processing, communication, remote control and anti-theft alarm system need to manually automatic programming products. 4 position or 4 in 1, Dual In-Line Package (DIP) SPDT slide switch, namely the more traditional toggle switch is a set of electrical switches which is packed in a small box or housing. This DIP single pole double throw (SPDT) switch forces the operator to choose between connecting to either one of two terminals as such the switch will remain connected to one or the other, and the two terminals will never be connected. This switch is designed to be easily mounted on printed circuit boards to provide various ranges of input to the electronic device. You can easily control the input by using the DIP switch. Applications: Widely used in circuit boards, breadboards and All PCB Projects, Perfect as a toggle or on off switch for your projects.

4-bit Bi-directional Shift Register IC - 74HC194 The 74HC Series 74HC194 bidirectional shift register is designed to incorporate virtually all of the features a system designer may want in a shift register; they feature parallel inputs, parallel outputs, right-shift, and left-shift serial inputs, operating-mode-control inputs, and a direct overriding clear line. The register has four distinct modes of operation, namely: Parallel (broadside) load Shift right (in the direction QA toward QD) Shift left (in the direction QD toward QA) Inhibit clock (do nothing) Synchronous parallel loading is accomplished by applying the four bits of data and taking both mode control inputs, S0 and S1, HIGH. The data is loaded into the associated flip-flops and appears at the outputs after the positive transition of the clock input. During loading, serial data flow is inhibited. Shift right is accomplished synchronously with the rising edge of the clock pulse when S0 is HIGH and S1 is LOW. Serial data for this mode is entered at the shift-right data input. When S0 is LOW and S1 is HIGH, data shifts left synchronously and new data is entered at the shift-left serial input. Clocking of the flip-flop is inhibited when both mode control inputs are LOW. check out : 4-Line to 16-Line Decoder/Demultiplexer IC - 74HC154 Pinout: Pinout Of 74HC194 IC