Breadboard is due to the board has a lot of small jacks, very similar to the small holes in the bread, so named, designed for electronic circuits without soldering manufacturing. Because a variety of can be inserted or pulled out at will as needed, eliminating the need for soldering and saving time in the assembly of the circuit, and the components can be reused, so it is ideal for the assembly, debugging and training of electronic circuits.

1 Introduction

Construction

Internal structure

The whole board is manufactured using the bottom of the board has a metal strip, in the corresponding position on the board punched holes to make components inserted into the holes can be contacted with the metal strip, so as to achieve the conductive purpose. Generally every 5 holes plate with a metal strip connection. The board generally has a notch in the center, which is designed for the need of integrated circuits, chip test and design. There are two vertical rows of jacks on either side of the board, also in groups of 5. These two sets of jacks are used to provide power to the components on the board

The motherboard uses a conductive layer of copper foil , the role of the solderless breadboard is fixed, and lead to the power supply.

Internal structure

Breadboard upper and lower parts of the internal wiring and the middle part of the different, as shown:

Use

No need to weld and manually wiring, insert the components into the holes can test the circuit and components, easy to use. Before use, you should determine which components should be connected to the pins together, and then the pins to be connected together into the same group of five small holes.

2 breadboard of the significance of electronic teaching

I. Breadboard circuit experiments so that the students' innovative thinking to take root.

Teaching psychology research shows that: students have no mental pressure, no psychological burden, mood, emotional state, easy to form the center of excitement, creative thinking is also easy to be activated. For example: in the past, students in the "LED running lights" experiment, directly with 220V welding, a fear of leakage; two students are afraid of scalding; three are afraid of scalding components, so the teacher's experiments on the students to intervene in more, which is not conducive to the cultivation of students' creative thinking. Imagine a student who shrinks in the experiment, afraid to do it, how can there be the germ of it? And today's breadboard is a commonly used in the circuit with a multi-hole socket plug-in board, which has the advantage of no welding, not afraid of leakage; will not be hot; will not burn the components. Students can be freely inserted in accordance with the wrong unplugged and reinstalled, the components will not be damaged in the slightest. If the circuit experiment fails to reassemble, if the circuit experiment is successful to experiment with the next new program, the breadboard gives students a loose circuit experimental environment, so that the students' thinking can be dispersed in the multi-directional radiation, so that the students' innovative thinking to take root and germinate.

Two, the breadboard circuit experiments so that students' innovative thinking growth and development.

Said: "Between the hand and the brain are inextricably linked, these links play a twofold role, the hand so that the brain to develop, so that it is wiser; the brain so that the hand to develop, so that it becomes creative, intelligent tools, into thinking tools and mirrors." And circuit experiments really are what Sukhomlinsky said, so with the help of the breadboard, I let the children really be the masters of their experiments. They experiment on the breadboard, can not be restricted by the collective activities, free to operate, as you wish to perform, which is to make the students innovative thinking to grow. For example: in the "LED running lights" experiment, I first let the students recognize the digital integrated circuits, time-based integrated circuits, and I do the running lights to the students to see that the running lights according to the order of red, green, yellow flashing. The students were very interested in it and experimented with it on their breadboards according to the circuit diagram. In the final Jugo demonstration, everyone said they couldn't stop talking about it, and the classroom atmosphere reached a climax. What is more valuable is that many students not only installed bright running lights, there are unique and innovative. A student turned 5 lights into 12 lights; a student of the red, green, yellow lights in reverse order to light; a student to shorten the time interval of the flashing lights. Breadboard circuit experiments enable students to develop innovative thinking.

Three, the breadboard circuit experiments so that students' innovative thinking blossomed.

Teachers should be in the juvenile electronics teaching process, should be good at guiding students to communicate electronic knowledge and real life interconnection, to encourage students to rely on life to design their own circuit experimental program. Students to design their own circuit experimental program is the process of their thinking, but also a variety of thinking synthesis process. Only let the students from start to finish to experience the whole process of designing their own experiments, their innovative potential to be developed, in order to expand the space of innovative thinking, while the breadboard circuit experiments for their own design of circuit experimental program provides the most favorable conditions. Such as teaching "automatic water filler" experiment, the students immediately thought of the winter, if there is no water in advance, come back to no hot water; if the water in advance, sometimes forget to turn off the gate, white tap water will be wasted a real pity, so the students take advantage of the advantages of the breadboard, their own design "solar energy automatically add water". The basic principle is: when the water level rises so that the two wires submerged, so that VT1, VT2 get the working current and at the same time conductive, which is the relay is closed, cut off the load power supply, the small motor stops, and no longer supply water to the water tank. When the water tank is short of water, the water level gradually fell so that one of the wires exposed to the water surface, VT1, VT2 cut off at the same time, then the relay is connected to the power supply, the red light keeps flashing, the small motor to open the tap gate water supply, when the water level rises to a limited position to repeat the above process. Practice has proved: with the advantages of the breadboard, so that students design their own circuit experimental program according to the actual situation of life, so that students' innovative thinking blossomed. In short, no matter which idea, we provide students with sufficient experimental materials, so that they are free to operate at will, as they wish to perform; let them design their own experimental program, try to explore, the results of the students' creative thinking to be rooted and sprouted? The result is that students' creative thinking is rooted and developed. The results of the students' creative thinking to get rooted and germinate?