Ask for tips and experiences in the lab

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When realistically searching for teasing experience, you can write according to the following suggestions:

1. Introduce the experiment: Before you start writing about the experiment, introduce the purpose, method, and results of the experiment to ensure that the reader understands what you are writing.

2. Record the process: In the experimental experience, record the problems, difficulties and solutions encountered in the experimental process in detail, and also record the successful experience in the experiment.

3. Summarize the results: At the end of the experiment, summarize the results of the experiment, discuss how the results are consistent with the expected results, or why they deviate, and think about how to improve the experiment.

4. Describe your experience: Describe the experience and skills you have learned in the experiment, such as how to use the instrument, analyze the data, etc. You can also talk about the scientific thinking you learned in the experiment, such as how to design an experiment, how to analyze the results of an experiment, how to formulate a hypothesis, and so on.

5. Evaluation experiment: evaluate the advantages and disadvantages of the experiment, and put forward suggestions and suggestions for improvement. This will help improve the quality and reproducibility of the experiment.

6. Highlight the key points: When writing the experimental experience, you need to pay attention to highlighting the key points of the experiment, such as experimental design, experimental methods, experimental results, etc. This will help the reader better understand your experiment.

7. Clear structure: When writing experimental experience, you need to pay attention to the clear structure and concise language. It's best to use subheadings and paragraphs so that readers can quickly understand and find the information they need.

In short, the experience should be clear, concise and accurate, and the reader should be able to read your experience and understand your experience, skills and knowledge, as well as the quality and reliability of the experiment.

The sample experience of the experiment is as follows:

Before doing the experiment of testing technology, I thought it would not be difficult to do, just like I used to do physics experiments, I finished the experiment, and then finished the experiment report in two clicks. It wasn't until I finished the test that I realized that it wasn't easy to do, but what I learned was proportional to the difficulty, and I benefited a lot.

Before doing the experiment, you must thoroughly understand the knowledge in the textbook, because this is the basis of the experiment, otherwise, you will listen to the mid-range when the teacher explains, which will make it more difficult for you to do the experiment and waste the precious time of the experiment.

For example, in the experiment of strain gauges, you must be clear about the various connections of the bridge, if you are not clear, you will only explore it when doing the experiment, which will make you a great waste of time and make you get twice the result with half the effort.

When doing experiments, you must do it yourself, be sure to figure out every step and every detail, figure it out, and after the experiment, you must also review and think quickly, so that your impression is deep and your memory is firm, otherwise, you will forget it all after a while, and it is better not to do it.

When doing experiments, the teacher will also teach us some knowledge that is not in the textbook based on his own experience, so as to broaden our horizons and make us realize that the application of this course in life is so extensive.

Through this experiment of testing technology, I have learned a lot of practical knowledge, and more importantly, the process of doing experiments and the way of thinking about problems, which are common to doing other experiments and really benefit us a lot.

1. Abstract: A karaoke record player mixing principle circuit is designed with RC oscillation circuit and integrated operational amplifier.

2. Design tasks and requirements: build a suitable RC oscillation circuit to make its output frequency about 1kHz. Adjust the resistance of the variable resistor so that it sends the voltage peak VP to the next stage.

Adjust the signal source so that the output is 2kHz, and the voltage peak vp is also the signal, and use an oscilloscope to observe the output voltage waveform before and after summation, and verify the actual effect of the summation circuit.

3. Overall scheme selection: RC oscillation circuit and integrated operational amplifier.

Fourth, the design and parameter calculation of the circuit

The RC oscillation circuit is a series-parallel network oscillation circuit: the output frequency is required to be 1kHz, and R9= R10=16K and C3= C 4= can be determined by the formula F0=1 (2 RC);

The inverse sum of 1:1 yields u0=-(r6 r5)u1-(r6 r4)u2, and determines r4=r5= r6= 1k; au=1+(r7+rd) r8, determine r7=160, r8=100;

c1= c2=10μf;

6. The working principle of the circuit: when the triode transmitting junction is positively biased and the collector junction is reversed, it is in an amplified state, and the circuit is a common emission amplifier circuit.

7. Characteristics and improvement suggestions of the designed circuit:

Improvement: From the waveform of the oscilloscope, it can be seen that there is crossover distortion and saturation distortion, and the resistance of the negative end of the first integrated amplification can be increased by 20 ohms. An 80 ohm resistor is connected in parallel on two diodes. That's it.

9. Harvest, experience and suggestions:

Through this experiment, we have basically mastered the design method of the basic amplification circuit of a single tube, understood how to generate ** waves, and how to apply the reverse adder.