8-CH 12V ULN2003 Based Relay Board The 8-CH 12V Relay can control any device just like a switch contact. Its contact is isolated from the driven circuit. Features: LED Indication of Relay ON. Power Indication LED. ULN2803 Relay Driving IC. ON/OFF Power Switch. Direct input from 3-5V Microcontroller for relay control. Output terminal for relay contacts. Provision of the male header for wire connection. Powered from external 12V or from the male header. Contact Rating: 5A at 240V AC Note: It is important that the microcontroller share ground with the relay board along with other control signals else it will not able to control the relay.

8-input NAND Gate IC - 74HC30 The 74HC Series 74HC30 is a 14 Pin 8-input NAND Gate IC having 2V to 6V Operating Voltage with an output current of 5.2mA.  Its input contains clamp diodes which enable the use of current limiting resistors to interface inputs to voltages in excess of VCC. Pinout: Pinout of 74HC30 IC

8025 12V DC Cooling Fan This is a High-Quality 8025 cooling fan, which consists of a 4-pole Brushless DC Motor with a precise vapor bearing system, this cooling fan can deliver an airflow up to 8.0 CFM, which is sufficient enough to keep the electronics cool. This creates a vibrating and shaking of the rotating rotor is prevented. Since there is no contact between the bearing and shaft, the bearing touches the result is just the surrounding air. The result is the creation of a cooling fan with exceptional features such as a uniform rotation, low noise, and special durability to meet any requirement. Features: Good airflow Noiseless Performance Easy to install and connect. Also check 12V CPU cooling fan sold by Iotcart.  The fan is 80 x 80mm and has a ball bearing. It can be used in CPUs, incubators, and 3D printers.

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8051 Development Board (Made in India) The 8051 Development Board is equipped with an Atmel AT89S52 Microcontroller IC and an RS232 chip. It features a DIP 40 Pin IC Socket for easy insertion and removal of chips, and can support a range of chips including AT89S51, AT89S52, P89V51RD2, and 8052. The board is built with a high-quality FR-4 (1.6 mm) PCB. In addition, the board has an on-board RS232 circuit that enables easy communication with a PC and other RS232 serial devices such as GPS modules, GSM modems, and RFID. It also has an extra Vcc bus (5V and 12V) and GND bus for power supply to external peripherals. The 8051 board has an on-board bridge rectifier, allowing it to accept both AC and DC input voltages for power supply. It is also equipped with a 5mm Power Plug-in DC Jack, a Power ON-OFF switch, a 5V regulator (LM7805) circuit, and a power indication RED LED. Other features of the board include an on-board reset button, a quartz crystal 11.05892 MHz, a GREEN USER LED at Pin P2.0, an input user switch Pin P3.3, and an input external interrupt switch (INT1) at P3.3 through jumper JP2. Port extensions are provided for all PORT with detailed labeling for easy identification of pins, and external pull-up resistors are included for port use. The development board also has an on-board ISP connector for loading HEX files into microcontrollers such as AT89S51/52. It has four 3mm mounting holes for easy mounting. read more : How to Choose a Microcontroller Applications Embedded Systems Robotics Internet of Things (IoT) Industrial Automation

80mm Aluminium CPU Heatsink This is an 80mm Long Aluminium Water Cooling Block Liquid Cooler Waterblock Radiator-GPU CPU Cooling Heatsink.  The CPU heatsink has a solid construction and choosing aluminium as the raw material is a wise option for heat dissipation. It is suitable for cooling graphics GPU, motherboard Northbridge Southbridge CPU, graphics; semiconductor cooling piece, industrial cooling, etc. The CPU heatsink is a water cooling block where the heat dissipation method that the liquid conducts the cold and heat exchange.

80mm Mecanum Wheel Set (Yellow) These 80mm Mecanum Wheels are designed to deliver true omnidirectional movement for your robotics and automation projects. Equipped with durable rubber rollers arranged at precise angles, these wheels allow smooth forward, backward, diagonal, and lateral motion without the need for complex steering mechanisms. Made from strong ABS and high-quality rubber, they offer excellent friction, quiet operation, and stable handling—making them ideal for advanced robotics builds. Perfect for DIY robots, industrial AGVs, and educational robotics kits, these wheels are compatible with 6.7mm couplings and work seamlessly with common TT motors and building block–style platforms. Whether you’re working on a competition robot, a warehouse robot prototype, or a compact omnidirectional rover, these Mecanum wheels provide smooth maneuverability and reliable precision. Features: Designed for 360° omnidirectional movement including sideways and diagonal travel. Made from strong ABS material with high-quality rubber rollers for maximum grip and smooth operation. Quiet, low-vibration performance thanks to optimized roller placement and friction control. Includes 2 left-hand and 2 right-hand wheels for complete Mecanum drive configuration. Compatible with TT motors, 6.7mm couplings, and building-block-style robotics systems. Ideal for AGVs, educational robots, hobby rovers, and advanced robotics prototypes. Lightweight construction ensures efficient torque transfer without burdening the motors.

824 – 960 MHz & 1710 – 1980 MHz GSM Sticker Antenna This GSM antenna operates in the 824 – 960 MHz and 1710 – 1980 MHz frequency ranges and delivers a high gain of 28dBi, ensuring reliable signal transmission and reception. Designed as a sticker antenna, it offers a low-profile, space-saving solution, making it ideal for compact and embedded GSM-based systems. Widely used in telecommunications, this antenna helps enhance the performance of wireless modules while also reducing the overall cost of radio integration. Whether you're working on IoT, mobile communication, or industrial applications, this GSM antenna provides a dependable and cost-effective wireless connectivity option. Application: GSM Features: Compact size. Low cost. The connector of your choosing Any cable length (recommended under 5m)

840PCS Breadboard Jumper Wire 14 Assorted Lengths Kit This 840PCS Breadboard Jumper Wire Kit is designed for makers, students, and electronics hobbyists who frequently build and test circuits on breadboards or PCB prototypes. It includes 14 different wire lengths, each pre-formed at right angles for smooth and secure insertion. With stiff, high-quality copper wires and clean cut ends, these jumpers ensure strong conductivity and neat routing when constructing complex circuit layouts. Everything comes neatly packed in a transparent storage box, making it easy to organize and access the wires during projects. Whether you're experimenting with sensors, testing microcontroller circuits, or building multi-layered breadboard setups, this assorted jumper kit delivers the reliability and flexibility needed for fast prototyping. The wires are unbreakable, easy to place, and suitable for any breadboard or point-to-point connection. Features: Includes 840 pre-formed jumper wires in 14 assorted lengths for versatile prototyping. High-conductivity copper wires ensure stable and reliable circuit connections. Rigid and unbreakable wire structure allows repeated use without deformation. Pre-bent right-angle ends provide easy insertion into breadboards and PCB holes. Comes in a transparent storage box for organized and convenient access. Suitable for all breadboard projects, circuit testing, and DIY electronics.

85MM Rubber Large Robot Smart Car Wheel Blue Color The 85MM Rubber Large Robot Smart Car Wheel in Blue Color is designed to provide excellent performance and durability for robot projects. With a tyre featuring a sponge liner for added strength, this DIY car wheel offers great traction thanks to its upgraded tyre tread for improved friction. The wheel is crafted from high-strength plastic for sturdiness, while the rubber tyre ensures maximum traction during operation. The stylish blue rim adds to its appeal, making it not only functional but also an attractive choice for your robot car. Its 85mm diameter and 38mm width make this robot car wheels a perfect fit for various robotics applications. Features The car hub is reinforced nylon, and very sturdy. Tire with sponge liner for more strength With upgraded tire tread for greater friction New design wheel for better combination with the motor