The application of the table lamp NTC thermal resistance

　　1. Touch

　　The principle of touch -type table lamp is to install electronic touch ICs inside, forming a control circuit with the electrode of the touches of the table lamp.

　　When the human body touches the inductive electrode, the touch signal is transmitted to the touch induction end by the pulse DC electrical signal, and then the touch induction will send a tactile pulse signal to control the turning on the lights; again, the touch signal will be pulled by the pulsation by the pulsation signal. The DC signal generates a pulse signal to the touch -induction end. At this time, the touch -induction end will stop sending a trigger pulse signal. When the AC power is over zero, the light will go out naturally.

　　2. Brightness adjustable

　　The working principle of the adjustable platform lights is to consist of resistance R2, potentiometer RP1, and capacitive C composition of the resistance and migration phase circuit. Regulating RP1 can change the direction angle of the two -way crystal gauge V, thereby changing the brightness of the bulb EL. The resistance R1 is a limit -limited NTC thermistor. C's charging speed is also related to the parallel circuit.

　　In the case of R1 and RP2 fixed, the diverting size is determined by the resistance value of the light resistance RL. When the voltage of the power grid rises, the light brightness increases, the RL resistance becomes smaller, the diversion increases, the voltage at both ends of the capacitance C rises and slows down, the pipeline V drive angle decreases, the output voltage decreases, and the light brightness decreases; When the voltage decreases, the RL resistance value increases, the diversion decreases, the pirate angle of the crystal gates increases, the output voltage increases, and the light brightness increases. The brightness of the light is automatically stabilized at the set value.

　　The NTC thermal resistance used by the table lamp today has many application advantages and characteristics, including the actual characteristics of high sensitivity, good reliability, good thermal response characteristics, etc., and the volume of this component can meet the actual application requirements. With the gradual improvement of household electrical appliances and office automation, the application function of NTC thermal resistance is diversified, and the requirements of intelligent systems and new development and application areas have good market potential.

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