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How do I connect LED and resistor to a speaker?

2019-01-28

In fact, the LED can be connected directly with the speaker. In other words, in order to protect the LED from being burned out, which need to be connected with the current limiting resistor in series.

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How can I dry out an electrical plug that fell into water?

2019-01-28

As for this question, an eletrical plug fell into water, the way we see, which actually depends on the following two different situations.

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What is the biggest hurdle facing super capacitors technology?

2019-01-25

The biggest hurdle of super capacitors technology : New material.

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How do you know if a phone has a temperature sensor?

2019-01-25

Actually, nowadays, temperature sensor is changed into CPU built-in sensor or thermal resistor. In addition, such a sensor is fitted inside the chip. That’s to say, the programmer can check it.

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Why does the electric car company Tesla Motors use AC motors in their cars?

2019-01-25

You know, comparing with DC motor, AC motor at least has the following three merits: 1) Without comutator, AC motor is simple in structure and convenient in fabrication; 2)AC motor is relative firmly, which is easy to be made a high speed, high volt

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What is difference between IR sensor and ultrasonic sensor?

2019-01-24

The difference between IR sensor and ultrasonic sensor: IR sensor, Infra-Red sensor, whose circuit is simple; However, it is heavily influenced by light and ranging unavailable; Ultrasonic sensor: Stable, ranging available and little influenced by l

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Why does a current transformer burn and break?

2019-01-24

There are four reasons contribute to why a current transformer is burnt and broken:

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Which sensor is used in vehicle speed?

2019-01-24

As for vehicle speed sensor, magnetic-electric sensor and photoelectric sensorthese two kind of speed sensors that are wildely used.

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What is the difference between a DSP and microcontroller?

2019-01-23

The difference between a DSP and microcontroller: DSP is essentially designed for fast processing of digital signals, which has such charecteristics, like the separation in terms of structure of data and address bus, greater data throughput, the de

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When does the reverse breakdown in a diode?

2019-01-23

As we all know, the diode(Wikipedia) is of forward conduction. When the reverse voltage is applied at both ends of the diode, which lead to the electrons can’t pass through the diode, so that the diode is equivalent to an open circuit.

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