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Can a photoresistor work like a solar cell?

2019-04-20

Not really. To be honest, as the increasing of light intensity, the resistance value of photoresistor reduces instead which can’t be converted into electric energy;

Can static electricity be enough to harm you?

2019-04-20

Yes! Static electricity is definitely harmful for us but not causing death. After all, the voltage of static electricity can up to tens of thousands of volts even hundreds of thousands of volts which is able to discharge on the spot and generate electrost

How does directional relay measure the direction of current flow in AC current?

2019-04-19

Directional relay consists of phase sequence detector, phase sequence automatic corrector, corrected signal amplifier and execution unit which indicates it is still able to measure the direction of current flow even in AC circuit.

What are the advantages of having a solid ground region on a PCB?

2019-04-19

A solid ground has a dual function, including increasing current and shielding interference.

How does self-powered sensor work? Where does it get energy to keep functioning?

2019-04-19

Actually, there are two various self-powered sensors: One is active sensor, the other is passive sensor.

Why is it difficult to transmit audio signals directly?

2019-04-18

So long as the audio signals convert into the voltage/ current signals or electromagnetic signals which can be transimitted.

What is the difference between relay and circuit breaker?

2019-04-18

The difference between relay and circuit breaker: Relay: Acted as accessory circuit but can’t allow large current; Circuit breaker: Used in main circuit system which can control not only single device but also multi device; Apart from that, wi

Which is more dangerous, current or voltage?

2019-04-18

It would be current; However, in fact, only both current and voltage up to a certain value can they hurt human beings;

What is ENEPIG PCB?

2019-04-17

The principle of ENEPIG: Compared to ENIG, there is one more layer palladium(Pd) between Nickel (Ni) and Gold (Au). As you probably know, deposition thickness of Ni is 120～240μin (about 3～6μm), Pd is 4～20μin( about 0.1～0.5μm) and Au is 1～4μin (about 0.02～

How do I check the defect in soldering in a PCB board?

2019-04-17

Found in the majority of checking the defect in soldering, manual and automatic system inspection methods remain immensely popular, such as the combination of manual optical inspecion and X-ray detection is the optimal method in terms of cheking soldering

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