3V CR2025 Lithium Coin Battery The CR2032 3V Lithium Coin Battery is widely utilized due to its dependable and long-lasting power supply for a variety of small electronic devices. This cr2032 battery includes calculators, wristwatches, remote controls, various medical devices, fitness gadgets, machines, toys, and others. Featuring a flat top and a 225mAh capacity, the cr2032 battery is a 3V lithium coin battery that's specifically designed for use in miniaturized products. Its plus terminal utilizes manganese dioxide, which is chemically stable, resulting in 90% capacity retention even after a decade of proper storage. Additionally, The battery organic electrolytes are resistant to leakage when exposed to environmental changes. Features High and Stable voltage (3V) A full lineup for use in a wide variety of applications No mercury added Useful in a wide range of temperatures (-30°C to +60°C) The very high weight-to-power ratio Manganese dioxide material High capacity Long Lasting life. Low self-degradation rate and superior storability 0.2mA continuous standard drain High leak protection and hence no oxidation damage in devices, so it can be used in any expensive Gadget with superior safety. Resistance to continuous discharge and hence Very low self-discharge; Note: These batteries are Non-Rechargeable. ?Also check 24mm Coin type battery holder available on the Iotcart website. The holder is versatile, accommodating various sizes and shapes of coin cells, with a secure design to withstand shock and vibration. It operates at a voltage rating of 3.3V and finds applications in portable devices, computers, consumer electronics, power management, commercial, and security.

3V-9VDC 600RPM N20 Miniature Gear Motor with Metal Gear This Micro Metal Gear Motor has small volume, torsion big, all metal gear, durable, not easy to wear. Great replacement for the rusty or damaged DC geared speed reduce motor on the machine. Widely used on Boat, Car, Electric Bicycle, Fan, Home Appliance. The N20 Micro Gear 3V-9V 600 RPM DC Motor (High Torque) is a lightweight, high torque, and low RPM motor. It is equipped with a gearbox assembly so as to increase the torque of the motor. It has a cross-section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter. It has a very small size so as fit in complex spaces of small-scale application. One can connect this Micro Gear Motor to wheels to drive them from one place to another while carrying high loads. This 600RPM N20 Micro Gear Motor (High Torque) has small volume, torsion big, all-metal gear, durable, not easy to wear. Great replacement for the rusty or damaged DC geared speed reduce motor on the machine. Widely used on Boat, Car, Electric Bicycle, Fan, Home Appliance. check out : 43mm Rubber Wheel Tyre for N20 Gear Motor

4 Bit Bi-Stable Latch IC - 74HC75 The 74HC Series 74HC75 is a 4 Bit Bi-Stable Latch 16 Pin IC. It contains 4 transparent D latches with a common enable (gate) on latches 0 and 1 and another common enable on latches 2 and 3. When Q follows D (latch enabled) latch is said to be transparent. Q output will change only on edge of the input trigger pulse. small triangle on the clock (Cp) input of the symbol indicates that the device is positive edge-triggered. D and clock inputs are synchronous inputs. set (SD) and reset (RD) inputs are asynchronous. They operate independently of D and Cp. bubbles on set and reset inputs indicate that they are low active. latches are ideally suited for use as temporary storage for binary information between processing units and input-output or indicator units. Pinout: Pinout Of 74HC75 IC

74LS75

4 Channel (I2C or SPI) 3.3V-5V Bi-Directional Logic Level Converter If you've ever tried to connect a 3.3V device to a 5v system, you know what a challenge it can be. The bi-directional logic level converter is a small device that safely steps down 5v signals to 3.3V and steps up 3.3V to 5v at the same time. This level converter also works with 2.8V and 1.8V devices. What separates this logic level converter from our previous versions is that you can successfully set your high and low voltages and step up and down between them safely on the same channel. Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side. The level converter is very easy to use. The board needs to be powered from the two voltage sources (high voltage and low voltage) that your system is using. High voltage (5v for example) to the 'hv' pin, low voltage (3.3V for example) to 'lv', and ground from the system to the 'gnd' pin logic level shifter bi-directional with 4 channels between high logic and low logic small module with 1.3Cm x 1.5Cm with 2 rows of 6 pin compatible with a breadboard, can be directly used in breadboard usage: for example, high voltage is 5v, low voltage is 3.3V hv connect with 5v power supply lv connect with 3.3V power supply and connect the power negative pole lvx input/output 3.3V TTL hvx input/output 5v ttl bi-directional transform between lvx and tvx Features: Mutual transform between 5V TTL and 3.3V TTL Four channels of logic and high voltage low voltage logic can two-way transform Portable and light, with 2 rows 6 pin contact pins Level Converter- 4 Channel Compatible with the bread plate, can be used directly put on the breadboard 4 Channel Module (great for I2C or SPI) and will work with all microcontrollers, Arduino, Raspberry Pi, Intel Edison, NXP Mbed Also check 2 Channel Logic Level Converter (I2C, UART, 5V-3.3V) available on the Iotcart website. It is a small device designed to safely step down 5V signals to 3.3V and simultaneously step up 3.3V to 5V. The converter is bi-directional and works with 2.8V and 1.8V devices as well. It has two inputs and two outputs for each side, allowing the conversion of 4 pins on the high side to 4 pins on the low side.

4 Channel 12V Relay Board This 4-channel 12 V relay module is a low pull, high release relay module and features energization status indicator light, release status led is off. By default, this is a 5V relay module and uses jd-vcc for the relay power and is compliant with international safety standards, control, and load areas isolation trenches. The 4 channel relay module can be used to control various appliances and other types of equipment with large currents. The maximum output of the relay module is AC250V 10A and DC5V 10A. The four-channel can be used to switch multiple loads at the same time since there are four relays on the same module. This is useful in creating a central hub from where multiple remote loads can be powered. It is useful for tasks like home automation where the module can be placed in the main switchboard and can be connected to loads in other parts of the house and can be controlled from a central location using a microcontroller. Note: If either of the relays does not turn on: The contacts might be welded due to overcurrent/arcing. Shaking the module firmly might help unstick the contacts The driver circuitry might have been damaged due to overvoltage. Input polarity might be incorrect. Jumper might not have been moved to the correct position Applications Switching mains loads Home automation Battery backup High current load switching read our blog explaining the relay applications , provides comprehensive information about relays, their working principles, construction, and various types.

4 Channel 5V Relay Board This 4 channel 5V relay module is a low-pull, high-release relay module and features an energisation status indicator light; the release status LED is off. By default, this is a 5V relay module that uses JD-VCC for the relay power and is compliant with international safety standards, control and load areas isolation trenches. The 4 Channel Relay Module is a convenient board that can be used to control high voltage, high current loads such as motors, solenoid valves, lamps and AC loads. It is designed to interface with microcontrollers such as Arduino, PIC, etc. The relay terminal (COM, NO and NC) is being brought out with a screw terminal. It also comes with an LED to indicate the status. The 4 channel relay module can be used to control various appliances and other types of equipment with a large current. The maximum output of the relay module is AC250V 10A and DC5V 10A. Applications: Switching mains loads Home automation Battery backup High current load switching Also check the 8 Channel 5V 10A Relay Module . Also, check our relay switch collection.

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%.