MQ-6 Gas Sensor Module The MQ-6 gas sensor module is a simple and easy-to-use device designed to sense LPG, composed mainly of propane and butane, concentrations in the air. With a sensitivity range from 200 to 10,000ppm, the MQ-6 gas sensor is suitable for a range of applications. The MQ-6 gas sensor has high sensitivity and fast response times. The sensor's output is an analog resistance, and the drive circuit is uncomplicated, requiring only a 5V power source to the heater coil, a load resistance, and a connection to an ADC. The MQ-6 gas sensor employs SnO2 as its sensitive material, which has low conductivity in clean air. As the concentration of target combustible gas increases, the sensor's conductivity rises correspondingly. By using a simple electro circuit, the change in conductivity can be converted into a corresponding gas concentration output signal. This gas sensor is highly sensitive to propane, butane, and LPG, as well as natural gas. The sensor can detect different combustible gases, particularly methane, and is suitable for various applications due to its low cost. Features Operating Voltage is +5V Can be used to detect LPG or Butane gas Analog output voltage: 0V to 5V Digital Output Voltage: 0V or 5V (TTL Logic) Preheat duration 20 seconds Can be used as a Digital or analog sensor The Sensitivity of Digital pin can be varied using the potentiometer Applications: Detect or measure Gases like LPG, and butane Air quality monitor Gas leak alarm Safety standard maintenance Maintaining environmental standards  in hospitals Also check the mq135 gas sensor , which is a versatile device designed for detecting gases like ammonia, sulfur dioxide, and carbon monoxide.

MQ-7 Gas Sensor The MQ-7 gas sensor is a device that can detect the presence of carbon monoxide (CO) gas in the air. It is commonly used in applications such as gas leak detectors, safety devices, and industrial control systems. The MQ-7 sensor operates by using a chemical reaction between the CO gas and a conductive metal oxide to produce a current. The magnitude of the current is proportional to the concentration of CO gas in the air. The sensor can be used to detect CO gas concentrations in the range of 20-2000 ppm. It is important to note that CO is a poisonous gas that can be dangerous at high concentrations. It is recommended to use the MQ-7 gas sensor with caution and to take appropriate safety measures when working with it. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm. This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance.

MQ-7 Gas Sensor Module The MQ-7 gas sensor module is a device that can detect the presence of carbon monoxide (CO) gas in the air. It is commonly used in applications such as gas leak detectors, safety devices, and industrial control systems. The MQ-7 sensor operates by using a chemical reaction between the CO gas and a conductive metal oxide to produce a current. The magnitude of the current is proportional to the concentration of CO gas in the air. The gas sensor can be used to detect CO gas concentrations in the range of 20-2000 ppm. It is important to note that CO is a poisonous gas that can be dangerous at high concentrations. It is recommended to use the MQ-7 sensor with caution and to take appropriate safety measures when working with it. This module provides both digital and analog outputs. The threshold level for digital output can be easily adjusted using the preset on the board. The MQ-7 sensor module can be easily interfaced with microcontrollers, Arduino and etc. Read our blog MQ sensor where we explained what is a gas sensor, what is 1ppm equal to, MQ sensor list of different series and their features. Applications: Domestic gas leakage detector Industrial CO detector Portable gas detector Standard Test Conditions of MQ7 Gas Sensor Temperature: 20°C ± 2°C Humidity: 65% ± 5% RH Standard Test Circuit: Vc: 5.0V ± 0.1V; Vh(high):5.0V±0.1V Vh(low): 1.5V±0.1V

MQ-8 Gas Sensor Module The MQ-8 gas sensor module is a device that can detect the presence of hydrogen gas in the air. It is commonly used in applications such as gas leak detectors, safety devices, and industrial control systems. The MQ-8 sensor operates by using a chemical reaction between the hydrogen gas and a conductive metal oxide to produce a current. The magnitude of the current is proportional to the concentration of hydrogen gas in the air. The sensor can be used to detect hydrogen gas concentrations in the range of 100-10000 ppm. Using a simple circuit to convert the change in conductivity of the gas concentration corresponding to the output signal. MQ-8 hydrogen gas sensor of high sensitivity, the monitoring of the other hydrogen-containing gas is also very satisfactory. This sensor can detect a wide range of hydrogen gas, city gas, in particular, is a low-cost sensor for a variety of applications. Suitable for home or industrial hydrogen leakage monitoring devices. Can not interfere with ethanol vapor, soot, carbon monoxide, and other gases. Applications: Detect leakages in the industry Used in mines Can be used in refrigerators and AC

MQ-9 Gas Sensor Module This is MQ-9 Carbon Monoxide, Methane, and LPG Gas Sensor Module can be used to sense Carbon Monoxide and Methane Gas. The sensitive material of the MQ-9 gas sensor is SnO2, which with lower conductivity in clean air. It makes detection by the method of cycle high and low temperature, and detect CO when the low temperature (heated by 1.5V). The sensor’s conductivity is higher along with the gas concentration rising. The MQ9 Gas Sensor Module conductivity is higher along with the gas concentration rising. When temperature rises (heated by 5.0V), it detects Methane, Propane, combustible gas, etc. and cleans the other gases as it absorbed under low temperature. MQ-9 usually applied in domestic gas leakage detector, industrial gas detector, portable gas detector, etc. When the high temperature (heated by 5.0V), it detects Methane, Propane, etc. combustible gas and cleans the other gases adsorbed under low temperature. Read our blog MQ sensor where we explained what is a gas sensor, what is 1ppm equal to, MQ sensor list of different series and their features. MQ9 Gas Sensor Wire Connections: VCC - Positive pole (5V) GND - Negative pole DO - TTL switch signal output AO - Analog signal output Applications: The domestic gas leakage detector Industrial gas detector Portable gas detector

MQ131 Ozone Gas Detection Module The MQ131 gas sensor module is a device that can detect the presence of ozone gas (O3) in the air. It is commonly used in applications such as air quality monitors and industrial control systems. The MQ131 sensor operates by using a chemical reaction between the ozone gas and a conductive metal oxide to produce a current. The magnitude of the current is proportional to the concentration of ozone gas in the air. The sensor can be used to detect ozone gas concentrations in the range of 0.05-10 ppm. Ozone is a toxic gas that can be harmful to humans at high concentrations. It is recommended to use the MQ131 sensor with caution and to take appropriate safety measures when working with it. The sensitive material of the MQ131 gas sensor is O3 SnO2, which with lower conductivity in clean air. When Ozone gas exists. The sensor’s conductivity is higher along with the gas concentration rising. Please use a simple electro circuit, Convert the change of conductivity to corresponding output signal of gas concentration. MQ131 gas sensor has a high sensitivity to Ozone, also sensitive to O3 CL2, NO2, etc. Features: Detection Gas: Ozone (O3). Detection Range: 10 to 1000 ppb (parts per billion). Sensor Type: Semiconductor. Operating Voltage: Typically 5V DC. Output: Analog signal output, with a voltage range of 0-5V. Sensitivity: High sensitivity to ozone and other strong oxidizing gases like chlorine (Cl2) and nitrogen dioxide (NO2). Response Time: Fast response and recovery. Durability: Long service life and reliable stability. Interface: Easy to interface with microcontrollers like Arduino and Raspberry Pi. Power Consumption: Low power consumption, suitable for continuous monitoring APPLICATIONS: Domestic ozone concentration alarm Industrial ozone concentration alarm Portable ozone concentration detector

MR105ZZ Double Shielded Miniature Ball Bearing (5x10x4 mm) This a a MR105ZZ Double Shielded Miniature Ball Bearings has deep groove geometry for high speeds and supporting both radial and axial loads. This deep-groove shielded ball bearing is for use in applications that involve combined radial and axial loads and a need for high running accuracy at high rotational speeds. Such applications include clutches, drives, gearboxes, compressors, pumps, turbines, and printing and textile machines, among others. Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. These elements can be one of the following types: ball, cylindrical, spherical, barrel, needle, spindle, or tapered. All rolling bearings are open, shielded, or sealed. The shield protects the working parts of the bearing from environmental debris that may be introduced and could reduce the ball bearing speed and lifespan. Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others. Each bearing has a HIGH load carrying capacity, which is around 250 kg to 500 kg. check out : 694ZZ Bearing 4x11x4 Stainless Steel Shielded Miniature Bearings Application: Conveying equipment Robotics Dental equipment Elevators Rolling mills Ship rudder shafts Aggregate crushers

MT3608 DC-DC Boost Module (2V-24V) The MT3608 2A Max DC-DC Step Up Power Module Booster Power Module is a budget-friendly module that enables the user to step-up a 2 to 24V input voltage to a 5 to 28V output at a maximum of 2A. DC-DC boost converters raise the input voltage to a higher voltage while simultaneously decreasing the available current since the module can't output more power than what it receives. This boost converter is adjustable and can generate a voltage within the 5.0 to 28V range while providing a continuous current of up to 1.5A based on the input/output voltage settings, with 1A accessible with most configurations. The input voltage should be lower than the output voltage, as the device operates as a boost converter. The MT3608 converter IC integrates over-current and thermal limiting features to safeguard against device failure in the event of excessive stress. Furthermore, the converter can utilize low ESR bulk ceramic capacitors instead of electrolytic capacitors, which eliminates long-term aging concerns and contributes to the compact design of the device. Features It’s efficient by up to 93%. It can source a good amount of current. It is an inexpensive converter module. It’s simple to adjust to get your desired increase in voltage.

MT8870 DTMF Voice Decoding Module The DTMF Decoder Module is the ultimate solution for projects requiring dual-tone multi-frequency decoding. Ideal for modem interfaces, mobile radios, and other DTMF applications, this module offers versatile compatibility and user-friendly design. With onboard LEDs, low power consumption, and adjustable guard time, it ensures quality performance and easy integration into UNO/MEGA2560/DUE boards. The central office quality and internal gain-setting amplifier guarantee optimal signal reception, making it a reliable choice for diverse projects. Convenient input interfaces, multi-channel outputs, and complete functionality make this module a must-have for enthusiasts and professionals alike. Purchase now and experience seamless DTMF decoding! Features: Onboard voice input interface Low power consumption Internal gain setting amplifier Onboard LED, it is very convenient to check the output state. Adjustable guard time Central office quality Onboard 3.5mm input interface 5 Channel interface On-board MT8870 frequency decoder chip Power-down mode Inhibit mode Onboard audio input interface Onboard LED lights for output state indicationComplete DTMF Receiver. Does not require external circuits or wiring, it can be inserted directly into the UNO/MEGA2560/DUE board to use. 12-Digital outputs decode mobile and fixed telephone keys (0-9, * #). Also, another 4 Digital outputs (ABCD) can use “DTMF Dial” for Software control. MT8870 DTMF Decoder Circuit Diagram: Applications: Modems, mobile radios, call routing. Mobile-controlled robots. Home Automation. Menu navigation via phone keypad. Industrial Automation. Education. Prototyping MT8870 DTMF Decoder Module - Arduino Test with PWM Audio Synth Tones

MTQ911 Temperature controlled variable soldering iron combination set The MetroQ Temperature-controlled variable soldering iron combination set MTQ 911 is a complete soldering kit that includes everything you need to get started soldering. The set includes a variable soldering iron, a dust-blowing ball, a soldering wire, a desoldering wire, a soldering iron stand, a rosin, a brush, two screwdrivers, a triangle plate, and a lever. All of the items are stored in an attractive plastic container. The variable soldering iron has a temperature range of 200-450 degrees Celsius, so you can easily set it to the correct temperature for the task at hand. The dust-blowing ball helps to keep the soldering iron tip clean, while the soldering wire and desoldering wire are essential for making and breaking solder joints. The soldering iron stand keeps the iron safe and secure when not in use. The rosin helps to improve the flow of solder, while the brush is used to clean the soldering iron tip. The two screwdrivers are for adjusting the soldering gun tip and the lever is used to release the soldering iron from the stand. The MetroQ temperature-controlled variable soldering iron combination set MTQ 911 is a great value for the price. It is a complete soldering kit that includes everything you need to get started soldering. The soldering gun set is well-made and durable, and it comes with a variety of useful accessories. Features: Variable soldering iron with temperature range of 200-450 degrees Celsius Dust blowing ball Soldering wire Desoldering wire Soldering iron stand Rosin Brush Two screwdrivers Triangle plate Lever Attractive plastic container The MetroQ Temperature controlled variable soldering iron combination set MTQ 911 is a great choice for anyone who needs a complete soldering kit. It is well-made, durable, and comes with a variety of useful accessories.