The device application circuit of the magnetic control circuit works as shown in the figure, and can be used for opening lights in warehouses, offices or other places. When the permanent magnet ZT and the reed switch AG are in close proximity, the two contacts in the AG are disconnected due to the action of the magnetic lines of force, and the four ends of the controller DM have no voltage, and no current flows through the illumination lamp H, so the lamp H is extinguished. Once the gate is opened, the controller DM is turned on and H is lit. Due to the strong illumination during the day, the internal resistance of the photoresistor RG is very small. Even if the AG is closed, the partial pressure of R and RG is less than 1.6V. Therefore, when the gate is opened during the day, H will not be lit. The night is equivalent to the RG two-pole open circuit, so the voltage of the four terminals of the controller DM is higher than 1.6V, and H is lit. RG can use MG45-32 unsealed type photoresistor, AG can be used as Φ3-4mm reed switch.
Plastic Package Diode.Among the electronic components, a device having two electrodes allows only the current to flow in a single direction, and many uses apply its rectification function. The Varicap Diode is used as an electronic adjustable capacitor. Most of the diodes have a current directionality that we often call the "Rectifying" function. The most common function of a diode is to allow only current to pass in a single direction (referred to as forward bias) and block in the reverse direction (referred to as reverse bias). Therefore, the diode can be thought of as an electronic version of the check valve.
Plastic Package Diode,High Frequency Diode,High Voltage Avalanche Diode,Plastic Package Zener Diode
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