Pyroelectric infrared induction automatic light circuit (9)

It is an induction automatic light made of TWH9512 pyroelectric infrared sensor module
. It can be used for automatic control of lighting in guard rooms, storage areas, stairways and other places. It can make the lights turn on when someone is leaving and turn
off when someone leaves. At the same time, it does not have a light control circuit. The circuit is automatically closed during the day and the light will not light up. Another feature of this switch
is that it adopts a two-wire connection method, so it can directly replace the ordinary power
switch and transform the light into an infrared automatic light without changing the original indoor wiring .
    The TWII9512 module can directly work on the 220V AC power line. After the electrical signal from the pyroelectric infrared sensor
PIR is processed by the module's internal circuit, the VK terminal outputs a trigger signal to drive the thyristor VTH to turn on
, causing the lamp F to light up. RI. It forms a light control circuit with RP2 . Adjusting RP2 can adjust the sensitivity of the light
, so that the electric lamp E lights up or goes out under the appropriate illumination conditions. liPl is an infrared sensor control sensitivity
adjustment. Adjust its resistance so that the light will light up when someone moves in front of the PIR.
    TWH9512 is a product module of Guangdong Zhongshan Dahua Factory (hnp:,,, +twh., onn cri). The module is packaged in plastic
. The appearance is shown in Figure 182(b). it has】. The two lead-out pins R and R are connected to the sensitivity reduction potentiometer, and S,
G and D are respectively connected to the corresponding pins of the pyroelectric external sensor; A[ and A are the 22(V alternating current input terminal; VK is the
trigger signal output terminal; CR is the external resistor-capacitor terminal; e is the external capacitor terminal; I}D is the light control signal input terminal. PIR
' is best to use the S02 type pyroelectric red well sensor produced by Zhongshan Nahua Electronics Factory . .In order to make
the sensor work normally and well, the sensor window should be equipped with a suitable model of Fei Zhai Er lens. For automatic kilim
lamp control, you can usually use the ttJ 77(}6 type or 770a supplied by the factory. Non-Nel lens.
The distance between the lens and the sensor window is 30tnm. The detection band is 108 6, the focal length is 2Limn, and the detection
angle is 8'. Readers are disgusted. Choose according to your needs.