Principle: Infrared induction source usually adopts heat releaseElectrical element, this element will lose the charge balance when the temperature of the infrared radiation of the human body changes, release the charge outward, and the subsequent circuit can generate an alarm signal after detection and processing. Usage: Adjust the concentric ring and infrared probe have a proper focal length, infrared light is just received by the probe, the probe will light signal into an electrical signal into the electronic circuit to drive the load work.
The working principle of the pyroelectric component is to use the radiant heat effect to cause the temperature to rise after the detection element receives the radiant energy, and then the temperature-dependent performance of the detector changes. By detecting a change in one of these properties, you can detectMeasured radiation. In most cases, radiation is detected by thermoelectric changes. When the element receives radiation, causing a physical change in non-electric quantity, the corresponding electrical quantity change can be measured by appropriate transformation.
This circuit is a pyroelectric infrared alarm circuit, VTO is the induction head, its principle can check pyroelectric sensor, CK7 is an amplifier circuit, it is responsible for amplifying the weak signal from the probe, the VT1 triggers the flip of 555, if someone enters the detection range, 555 is triggered, 3 pin output high voltage, relay action, K1 is on the alarm.
Y1 is hot releaseElectric infrared sensor, the power supply provides stable operating voltage for Y1 through RCC3, C4 filters out high-frequency noise, Y1 output signal (if there is a human or animal activity in front of the sensor) through R7 to the 14 pin of IC1.
Give you this thermal infrared alarm circuit, the above is to control the equipment, the following is to receive the alarm 20 meters away from the fan, where there are active people in the control range, of course, there are high-power.
Rambler ub901s OK. Bluetooth connectionConnect to ub wireless charging : Rambler UB901S uses Bluetooth technology ub wireless charging , which can be wirelessly connected with devices compatible with ub wireless charging to provide convenient audio transmission. High quality ub Wireless Charger : This headset supports high quality audio, providing a clear, realistic sound experience. Portable design ub Wireless Charger : Rambler UB901S with lightweight,To charge the car battery, there is 12V DC power supply, with what can adjust the charging current? _ Baidu... '> Charge the car battery, have 12V DC power supply, what can be used to adjust the charging current? _ Baidu...
First use distilled water or battery special supplement liquid to adjust the liquid level of the battery to the specified height; Before charging, connect the battery to be charged according to the rated voltage and rated current of the charging device. The total voltage of the battery in series cannot be greater than the rated voltage of the charging equipment. After the battery is charged, check the density of the battery electrolyte.
If your power supply output is accurate 12V, use it to charge a 12V battery because there is no differential is not charged. If the output voltage of the power supply can be adjusted to 15-- 18V, the battery can be charged, and the resistance value of the specific resistance depends on the power of the power supply. The charging current of the 100AH battery can be controlled in the range of 6-10A.
is a battery, the charging voltage is adjusted to 12V, the two are adjusted to 24v. Then see which is the positive electrode of the battery (generally the positive electrode to the motor, and the negative electrode to the iron), and use the red clip of the chargerLive in the positive pole, black clamp the negative pole, plug in the power cord can be charged. At this time, two meters of current and voltage on the charging machine are raised. Then adjust the charging current button to control the charging size. So you can charge it.
The above is a photo of a charger, and the device on the panel is basically composed of a voltage selector switch (lower left), a current adjustment button (middle) and a charging ammeter. First of all, to charge the battery to understand the rated voltage and capacity of the battery to be charged two parameters. The voltage is already known to be 12V, the capacity is unknown, you can check the label of the battery, we assume that the capacity of the battery is 40 ampere-hours (Ah).
Car 12-volt battery charging, the charger voltage is 12V and the current should be adjusted to about 15A. The battery charging current is related to the battery capacity, generally one-tenth of the battery capacity (error ±0.5 or so), for example, the specification of a 12V20aH battery, the normal charging current is 5A-5A. According to the corresponding output current, adjust the gear above the charger (using 1/2 gear).
The voltage is adjusted to 15V, the current is adjusted to 2A below, and it is good to charge slowly. Car battery introduction: Battery, also called battery, battery is a kind of battery, its working principleIt converts chemical energy into electricity. Usually, the battery is referred to as the lead-acid battery. That is, a battery made mainly of lead and its oxides, and the electrolyte is a sulfuric acid solution.