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I know that electromagnetic waves are generated by the change of the magnetic field around the fluctuating current, and the induced current generated by the fluctuating magnetic field when receiving. This is the basic principle of electromagnetic wave communication.
How to answer the following...
If after turning on the oscilloscope, I only see one or two moving points but no scan line. What is the reason? How should it be adjusted? What if you see one or two fixed points? what is the reason? How to adjust?
A 60A filter is connected to the 20A circuit breaker, and the filter output is connected to two 3500VA isolation transformers. The two isolation transformers supply power to the two devices respectively. The working current of the two devices is about 5A together. Occasionally, the measured...
Help: The difference between LM331 and KA331, mainly for debugging
I am a junior scholar, and made a digital thermometer according to the picture. The V/F circuit inside is LM331
Since LM331 was not found, KA331 was used instead,
It looks exactly the same from the PDF data, but it can’t be...
