A device that recovers an original modulated signal from oscillations or waves generated by modulation. Applied disciplines: Communication technology (a subject); communication principles and basic technologies (two subjects). It restores the amplified AC voltage to a DC voltage whose magnitude and polarity correspond to the amplitude and phase of the AC voltage. The following figure shows the principle circuit of the demodulator. RL is the load and C is the filter capacitor. Its function is to smooth the output DC voltage. The demodulation switch K and the input AC signal have the same frequency. When Ui is positive, the switch is turned on, and the output is equal to the input voltage UO. After the smoothing of the capacitor C, a smooth DC voltage UO should be obtained. Conversely, if Ui is negative, the switch is turned on, Ui is positive, and the switch is turned off, the output receives a negative pulsating DC voltage UO.
2.Metal panel, anti-oxidation surface treatment, durable use.
3.Free handles design which prevent vandalism.
4.Unique hidden mechanical key hole design.
5.ANSI standard five latches structure guarantee security.
6.False-closing alarm: light and voice warning when incomplete closing.
7.Compact lock body structure, good mechanical linkage.
8.Circuit board: microcomputer chip control, more stable.
9. Low working voltage alarming function.
Our Smart Hotel Door Lock is use smart cards as its keys and is controlled by a microcomputer inside it. It is reliable, easy to use and manage, which makes it`s a perfect choice for hotels, apartments. Unique ultra-low power design, only 4 batteries provide enough power for a lock to work normally for more than one year.
Features:
1.Using RFID,IC card-125Khz or M1 card 13.56Mhz unlocking the door.2.Metal panel, anti-oxidation surface treatment, durable use.
3.Free handles design which prevent vandalism.
4.Unique hidden mechanical key hole design.
5.ANSI standard five latches structure guarantee security.
6.False-closing alarm: light and voice warning when incomplete closing.
7.Compact lock body structure, good mechanical linkage.
8.Circuit board: microcomputer chip control, more stable.
9. Low working voltage alarming function.
10.Automatic anti-false, Being able to distinguish the RF copied or forged.
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Shenzhen Zhuohao Intelligent Electronic Development Co., Ltd. , https://www.actopsmarts.com