Talking about the steps of making traffic signal lamp model.

The manufacturing steps of the traffic signal lamp model are as follows:

Prepare a rectangular blue cardboard, about 6 cm wide, fold the long side in half and paste it (more firmly). Next, the short side is folded in half. Fold the bottom 90 degrees to both sides and stick the rest together. Then stick a black rectangular cardboard on it. Cut a circle with a red, yellow and green card and paste it. Finally, just cut out a rectangular piece of paper and paste it, and a simple traffic light will be ready.

First, prepare a piece of cardboard, draw the general shape of the traffic lights on the cardboard, and then draw three circles on the cardboard with compasses. And cut them out, cut them out, draw three circles in red, yellow and green, and stick them on the traffic lights, so that the manual traffic lights are completed.

Simple traffic light circuit is a simple application of pulse digital circuit. The function of lighting different traffic lights in different directions in different time countdown is designed, and seven digital tubes are used to display the time. This traffic light can realize the color conversion of red, yellow and green light in the east-west and north-south directions, and the next step is to emit light in four stages. In case of emergency, you can manually control the red lights in four directions to light up.

Firstly, the working principle of making traffic signal lamp model is discussed. Secondly, the design and manufacturing method of traffic signal lamp model. Finally, the function of making traffic signal lamp model.