How to choose the right Christmas lights?
Christmas lights are a great sight in the holiday season. With the advent of November and December, you may find strings of colorful lights everywhere-Christmas trees, houses, shrubs, low trees, and even passing cars are covered with colorful lights.
Dating back 30 or 40 years ago, looking back at how people used lights to decorate houses and trees, you will find that most people used small 120-volt incandescent bulbs. Each bulb is a 5 or 10 watt bulb, just like the lights you see at night. You can still find these light strings, but they are not so common anymore. This is mainly due to the following reasons: they consume a lot of electricity. These bulbs have no shunts.
Now more complex bulbs have 16-function controllers, and you can control the bulbs according to various interesting patterns. In these systems, you will usually find a control box that drives four independent mini-light strings. The four light strings are connected in a staggered manner, not one after another. If you disassemble the control box, you will find that its structure is very simple. It contains an integrated circuit, four transistors or triacs-one switch drives a string of lights. The integrated circuit only needs to turn on the triac to light up one of the light strings. Various lighting effects can be designed by properly sequencing the triacs.