As shown in the figure, the controller has 555 as the core, and the photosensitive tube (3DU type), RP constitutes the RS flip-flop circuit. At night, the resistance between the ce poles of the 3DU tube is extremely high, the 2 feet are close to the ground potential, the 555 is set, the 3 feet are at a high level, and the lamp is lit; during the daytime, due to the illumination, the resistance between the 3DU tube and the ce pole is reduced, 6 feet The voltage exceeds the threshold level 2/3 VDD, 555 resets, and the light is off.
AC Contactors
Magnetic AC Contactor is divided into AC contactors (voltage AC) and DC contactors (voltage DC),which are used in power,distribution and power applications.In electrical engineering, because it can quickly cut off the AC and DC main circuits and devices that can be frequently switched on with high current control (up to 800A),Magnetic AC Contactor is often used as a control object for motors, as well as for controlling plant equipment. The electric load of the electric heater, the working machine and various power units, the AC Contactor/DC Contactor can not only turn on and off the circuit, but also has a low voltage release protection. The AC/DC Contactor has a large control capacity and is suitable for frequent operation and remote control. It is one of the important components in the automatic control system.
AC Contactor is our mainly products,we have our own research and development team,we are always commited to provide the good quality,best service to all of our clients.Our AC Contactor had experienced many changes,so you can see that Economic AC Contactor-New AC Contactor-Super AC Contactor,also have LC1-F AC Contactor etc,in order meet different kinds of customer's requirements.
Magnetic AC Contactor,Electrical AC Contactor,Electric AC Contactor,Mini AC Contactor
Ningbo Bond Industrial Electric Co., Ltd. , https://www.bondelectro.com