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What is earth resistance tester?

2019-04-01

Earth resistance tester: A common tester that is used to check and measure the earth resistance; An indispensable tool for electrical safety checking and grounding engineering checking and accepting.

What's the effect on the properties of soldering lead if it's repeatedly heated?

2019-03-30

Bad effect: If the lead is repeatedly heated, the alloy power of the solder paste and welding flux will occur chemical reaction which definitely lower its viscotity ans activity. That’s to say, the welding quality of lead solder paste is gonna become awfu

What is an LED aluminum PCB?

2019-03-30

LED Aluminum PCB: The PCB base material is aluminum which is pretty convenient to realize heat dissipation, especially for those high-power LED PCB.

What software do you recommend for circuit board design for small PCBs?

2019-03-30

In general, Protel and Altium Designer should be the most suitable PCB designsoftware for small PCBs and newbie, cause these two design requirements are not too rigorous;

What is a slip ring induction motor?

2019-03-29

Slip ring induction motor is also called three -phase wire wound alternating rotor asynchronous motor;

In electronics, is black negative or positive?

2019-03-29

In electronics, Black generally represents Negative;

What is the best CNC plasma cutting machine?

2019-03-29

The way I see, according to the features of the need-to-be-cut object, choosing the right CNC plasma cutting machine that is the best one, such as ANDELI, WORX, CLOUDRAY, Burley, etc. What do you think?

What is the best stack up for an 8 layer PCB?

2019-03-28

Frankly speaking, when it comes to the best stack up of PCB, which actually refers to a couple of aspects, such as the common base material, dielectric, shield and reference layer; However, all of these depend on the specific requirements of PCB.

Why don't we have a digital fuel meter which shows the exact amount of fuel?

2019-03-28

I’m afraid a digital fuel meter is still on the developing way. You can be the one to invent it in the near future. PS: It is known that the fuel meter indicates the fuel storage in the vehicle fuel box showing with pointers or digital numbers; Besides

Are public pay phones still being used?

2019-03-28

Yeah! There are only some difference beteewn twenty century and future:

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