3 in 1 Raspberry Pi Aluminium Heat Sink This is an aluminum heatsink kit used for cooling the chips on Raspberry Pi. Compared to another heat sink, it has been attached with thermal conductive adhesive tape, allowing the Raspberry Pi to cool more efficiently. Besides, the installation is simple, what you need to do is to remove the heatsink protection and stick it on Raspberry Pi. Compatible with Raspberry Pi B. Installation Method All you need to do is remove the heatsink protection and stick it on the raspberry pi. The heat sink has an adhesive film on the back that is easy to mount on the BGA chip by pressing it gently. The heatsink will stick to the BGA chip and cool it. Note: Iotcart is the authorized sellers of Raspberry Pi products in India. Therefore even if you are in Bangalore, Hyderabad, Kerala, Mumbai or Pune, you can buy Raspberry Pi Heatsinks online from Iotcart at the comfort of your homes.

3 mm Yellow LED (Pack of 10) A Yellow light-emitting diode (LED) is a semiconductor light source. LED's are used as indicator lamps in many devices and are increasingly used for other lighting. It looks like a white led and illuminate's blue light. When a light-emitting diode is switched on, electrons are able to recombine with holes within the device, releasing energy in the form of photons. This effect is called electroluminescence and the colour of the light (corresponding to the energy of the photon) is determined by the energy bandgap of the semiconductor. read our blog about Turning on an LED with your Raspberry Pi’s GPIO Pins which explains controlling led with raspberry pi .

3 Pin Push in Conductor The 3 Pin lever nuts connector is designed with a rated voltage of 400V and an impulse voltage of 4KV. The 3 pin lever nuts compact connector is manufactured with a modified nylon (PA66) and phosphor copper is used as a contact material.

3 Pin Toggle Switch (3A 230V) This particular SPDT toggle switch is designed to be panel-mounted, with a threaded bushing that allows it to be mounted securely to a panel or enclosure. The toggle switch has a standard rating of 3 amps and 230 volts, making it suitable for a wide range of applications. SPDT stands for Single Pole Double Throw, which means that this switch has a single input or output, and two possible outputs or inputs that can be selected by toggling the switch. This makes it an ideal component for projects where you need to select between two options, such as choosing between two different power sources or selecting between different operational modes. One of the key features of this SPDT toggle switch is its front screw, which allows for easy installation and secure mounting to an enclosure using the provided nut. The washer and nut also make installation a breeze, ensuring that the switch stays firmly in place. This Mini Panel Mount SPDT Toggle Switch is a reliable and versatile component that is well-suited for a range of projects and applications. Its simple yet effective design and ease of installation make it a popular choice among DIYers, hobbyists, and professionals alike. Application: Lighting Motors DIY Projects

3 Ply Meltblown Disposable Masks The 3 Ply Masks are made of 3 layers that are meltblown together that makes them very reliable for protection. These masks are also known as Disposable Surgical Masks or Respiratory Masks. Using this mask is a great step towards protecting one against COVID-19. It is made of non-woven skin-friendly fabric that has high-density filter layer. The mouthpiece of the mask covers the maximum area of the face for optimum safety. Each layer is spun bound non-woven 100% polypropylene 30 GSM, with elastic rubber ear loop (ultrasonic/glue pasting/stitching). Manufactured under Quality Standards ISO 9001:2015, CE and GMP. How long disposable masks should be used for? Health Experts and Medical Officers highly advise against using your surgical mask/disposable mask for a long duration of time. Dispose of the mask after a complete day of use. It is not advised to re-use them even after washing them. To dispose of the mask, remove it from behind and discard it immediately in a closed bin. Wash hands with alcohol-based sanitiser, or soap and water.

3 Series 20A 18650 Lithium Battery Protection Board Lithium Battery Protection Board is your ideal choice for efficient and reliable battery management. This 3 Series 20A board comes with AUTO Recovery, ensuring uninterrupted power for your devices. It's designed for 3.6V, 3.7V lithium batteries, including popular types like 18650 and 26650, as well as polymer lithium batteries. With a continuous discharge and charge current of 20A, this protection board is a powerhouse, perfect for drills, sprayers, LED lights, and low-power inverters. The integrated 10 low load resistance MOS tube ensures balanced charging with 100mA balanced current, optimizing battery performance. The board operates smoothly in a wide voltage range, from 16.8V to 18.1V, accommodating different battery setups. Its compact design, measuring approximately 46 x 60 x 3.4 mm, allows easy installation on the battery bundle or in confined spaces. Safety is a priority with our Lithium Battery Protection Board. Follow the recommended wiring for 0V to 16.8V, preventing short circuits and ensuring reliable, safe operation. Note : The Successful start of the drill requires a three 15C-20C power battery, or six 10C-15C power battery (ordinary 18650 cannot start the drill!!). Strictly according to map wiring 0V, 4.2V, 8.4V, 12.6V, 16.8V, do not deliberately short circuit. When the load of the brush motor is used, try to connect a non-polar capacitor (withstand voltage above25V, capacity 10uF-100uF) to the motor’s positive and negative terminals to prevent the reverse spike from the motor. Break the MOS tube. 4 groups of batteries in series, please ensure that the voltage of each group of batteries, if not the same, please fill each battery separately and then use it in series. The Discharge test, the voltage drop faster battery that group is a poor battery. Features: 3S 11.1V 12.6V 20A 18650 lithium battery protection board (comes with recovery function-AUTO Recovery). Application: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650.26650, a polymer lithium battery). Continuous discharge current (upper limit): 20A (if the cooling environment is not good, please reduce the load current use). Continuous charge current (upper limit): 20A. Suitable for the drills with starting current below 80A, power 135W below.

3 Series 40A 11.1V 12.6V 18650 Lithium Battery Protection Board with Balance The 3 Series 40A Lithium Battery Protection Board (11.1V to 12.6V) with a Balance function is designed for drill motors, sprayers, LED lights, and low-power inverters. It supports auto recovery and features an integrated 10 low load resistance MOS tube. This board delivers a continuous discharge of 40A and a balanced current of 100mA. It is compatible with 3.6V and 3.7V lithium batteries (such as 18650, 26650, and polymer lithium types) with a charging voltage range of 16.8V to 18.1V. The board can handle a continuous charge current up to 20A and is ideal for devices with a start current below 80A and power requirements under 135W. Compact in size (46 x 60 x 3.4 mm), it can be easily installed on a battery pack or in tight spaces. Features 3S 11.1V to 12.6V 40A lithium battery protection board with auto recovery function. Compatible with 3.6V and 3.7V lithium batteries (including 18650, 26650, and polymer lithium batteries). Maximum continuous discharge current: 40A (reduce load current if cooling is inadequate). Maximum continuous charge current: 20A. Ideal for drills with a starting current under 80A and power requirements below 135W. Note For successful drill startup, use three 15C-20C power batteries or six 10C-15C power batteries (ordinary 18650 batteries cannot start the drill). Follow the wiring diagram carefully: 0V, 4.2V, 8.4V, 12.6V, 16.8V. Avoid intentional short circuits. When using a brush motor, connect a non-polar capacitor (withstand voltage >25V, capacity 10uF-100uF) across the motor’s positive and negative terminals to prevent damage from reverse spikes. For 4 battery groups in series, ensure each group has the same voltage. If not, charge each battery individually before using them in series. If any battery in the group drops voltage faster during discharge, it may be defective.

3-24V Active Piezo Electronic Buzzer with Continuous Sound Alarm Tone 3-24V Active Piezo Buzzer is a compact and reliable sound device designed for stable performance across a wide range of electronic applications. With a working voltage of 3–24V DC and a rated voltage of 12V DC, this piezo electronic buzzer delivers a loud 85–95dB continuous sound while consuming just 10mA of current. Built with an integrated design of a multivibrator, piezoelectric chip, and resonator, it ensures long service life and consistent operation. Lightweight and easy to install with a simple 2-wire connection, this piezo buzzer is ideal for both DIY and professional projects. It is widely used in computers, printers, alarms, copiers, timers, automotive electronics, telephones, and electronic toys, making it a versatile and dependable choice wherever a clear audio alert is needed. Features: Durable & Reliable – Built with stable construction for long service life and consistent performance. Wide Voltage Range – Operates smoothly on DC 3–24V with low power consumption (only 10mA). Loud & Clear Sound – Produces a strong 85–95 dB continuous alarm tone for effective alerts. Easy to Use – Features a complete drive circuit, works directly from a DC power source. Simple Installation – Comes with 2 mounting holes and 2-wire pigtails for quick setup. Versatile Applications – Suitable for alarms, computers, printers, copiers, electronic toys, automotive devices, timers, and DIY electronics.

3-6V Mini Submersible Water Pump If you're in search of an efficient and affordable water pumping solution, the Mini Micro Submersible Water Pump is your answer. Operating on a 2.5 ~ 6V power supply, it's versatile and suitable for users of all ages. Our commitment to quality ensures that this pump is both durable and reliable, and you can choose from a range of Color/Size Variations to suit your needs. This water pump incorporates advanced technology, giving it a unique edge, making it ideal for water projects and efficient water management. Crafted with high-quality materials, it thrives in various conditions, all while maintaining an attractive price point. Easy to use and maintain, it's designed for DIY enthusiasts and anyone in need of a water pumping solution. Multipurpose and efficient, this mini submersible pump caters to a wide audience and comes at an affordable price, making it an ideal choice for water enthusiasts and those looking for reliable water pumping. Check out our entire range of DC Pumps & SOVs Features: Flow Rate: 80 - 120 L/H supply range (2.5 ~ 6V) Crafted with high-quality materials for durability Advanced technology for efficient water management Easy to use and maintain, designed for DIY enthusiasts Applications: DIY Projects. Freshwater intake or exhaust systems for fish aquariums. Garden watering systems. Dispensers Irrigation systems

3-Axis USB CNC Arduino Nano Controller A4988 Stepper Motor Driver Board Engraving Electronic Control Panel Material: PCB Model: LBA-B-V4 Dimension: 120*65mm Pitch size: 112*57mm Laser Power: 100mW to 5W Axis: XYZ Three Axis Power Supply: 12V Stepper Motor Power: Max 2 Limit Switch: 6 CH(X+ X- Y+ Y- Z+ Z-) Support For: A4988 Driver Function: Supporting adjusting Laser Power Weak light function Optical coupling isolation Anti- jamming Support for high power laser Miniature master software support The latest CNC firmware Gold plated pins Limit switch Motor subdivision External relay and so on.