The vast! Draw a circuit on the paper to make the LED light shine

A group of forwarding high picture on the Internet recently, the pen drew a circuit diagram in the paper, even at the end of the LED lamp, the other end is connected to a battery, he said as long as you hold down the button battery the LED bulb will miraculously shine. But is it really the case?

As the user draws the circuit diagram is a silver pen, the program group prepared the most common two kinds of silver pen on the market: Silver neutral pen and silver marker pen. At the same time also prepared button batteries and LED lights.

First, with a silver neutral pen to draw a simple diagram in black paper, the positive and negative pole pull a line, put the LED lights, even the battery, and found that the lamp is not lit, the circuit diagram is not conductive, the failure of the experiment. Followed by a silver pen for the second test, draw the same circuit diagram, the connection is good, the light is still not bright. Experiments show that the two ordinary silver strokes out of the circuit diagram and can not conduct. Some netizens said that the experiment is indeed a silver brush, but in fact is a special silver pen.

Next, according to the netizen said, the program group conducted third experiments in the same circuit diagram, LED lamp and the same button batteries, even good lights! Under the same conditions, the ordinary silver stroke circuit diagram does not respond, and the special silver pen can really light up the LED lamp. Due to the brightness of the LED lamp is too small, the experiment was upgraded again, will be replaced by LED lamp headlamps, and equipped with the corresponding button batteries, followed by a blue light with the light, the experiment was successful.

In fact, this mystery in silver pen special, it is called the silver pen, which is the needle, is filled with conductive silver glue, jelly powder is made, the conductivity of silver is very good, so the draw lines can be conductive.

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