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The sensor has a sensitive filament made of SnO2. In the presence of clean air, this filament tends to have lower electrical conductivity. When a combustible gas such as LPG is introduced, the filament’s conductivity rises, and the amount of change in it’s conductance/resistance can be used to indicate the equivalent gas concentration. This effect tends to be particularly pronounced at higher temperatures, and resistive heating element is present as well. SnO2 is particularly sensitive to Methane, Butane and Propane, but is also sensitive to other combustible gases as well.
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This is a simple-to-use liquefied petroleum gas (LPG) sensor, suitable for sensing LPG (composed of mostly propane and butane) concentrations in the air. The MQ-6 can detect gas concentrations anywhere from 200 to 10000ppm. This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.
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A unipolar stepper motor has one winding with center tap per phase. Each section of windings is switched on for each direction of magnetic field. Since in this arrangement a magnetic pole can be reversed without switching the direction of current, the commutation circuit can be made very simple (e.g., a single transistor) for each winding. Typically, given a phase, the center tap of each winding is made common: giving three leads per phase and six leads for a typical two phase motor. Often, these two phase commons are internally joined, so the motor has only five leads.
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Description
- The mini USB LED light is good for camping and desktop/laptop lighting .
- It is quite convenient,the light will turn on/off when you touch the back of the sensing area.
- the light can be dimmer when you touch the back of the sensing area.
- It is compatible with all standard USB plug device, such as power bank, car/mobile charger, desktop computer, laptop, etc.
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FEATURES: * High sensitivity to CH4,Natural gas. * Small sensitivity to alcohol, smoke. * Fast response . * Stable and long life * Simple drive circuit APPLICATION: They are used in gas leakage detecting equipment in family and industry, are suitable for detecting of CH4,Natural gas.LNG, avoid the noise of alcohol and cooking fumes and cigarette smoke.
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Description The LM35 series are precision integrated-circuit temperature devices with an output voltage linearly-proportional to the Centigrade temperature. The LM35 device has an advantage over linear temperature sensors calibrated in Kelvin, as the user is not required to subtract a large constant voltage from the output to obtain convenient Centigrade scaling. The LM35 device does not require any external calibration or trimming to provide typical accuracies of ±¼°C at room temperature and ±¾°C over a full −55°C to 150°C temperature range.
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This DC-DC Module is based on IC XL6009E1 which is a high-performance step-up switching current (BOOST) module. The module uses the second generation of high-frequency switching technology XL6009E1 core chip that offers superior performance over the first generation technology LM2577. XL6009 replaces LM2577 module as LM2577 is about to be phased out.
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Working voltage: 4.5V to 5.5 V. Transmit tube pressure drop: Vf = 1.6 V Transmit tube current: 20 mA Signal output: A, B two way; The TTL level Distinguish precision: 0.01 mm Measurement frequency, 100 KHZ Encoder diameter: 24 mm Encoder type D hole diameter: 4 mm The encoder resolution: 20 line Speed measuring sensor configuration: The configuration can measures 1 road motor speed