The Editorial team

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   Sometimes we drop a coin into a slot machine and select our choice. The machine gives us the item, and if the money is enough, returns the change. However, if we drop a foreign or fake coin or a washer, it returns it to us. Exactly how?
Each coin, throughout the world has its own characteristics in weight, diameter, thickness and composition. The machines are programmed differently for different coins throughout the world. The checking system starts with the slot itself. A too wide, too thick or too bent object will not go in. The coin falls in a balanced cradle and topples to the runaway. Lighter objects fail to topple the cradle and fall in the reject channel. The approved coin travels through the runaway past a magnet. The magnet slows down the coin due to tiny electrical charges set inside it. The coin with the correct composition slows down the right amount allowing it to miss the next obstacle- the Deflector. Instead, it hits the separator present below at the correct angle into the Accept channel. Overweight objects rebound the deflector into the wrong channel. Its value is also identified and in the last, a microchip releases the appropriate change from tubes filled with smaller value coins. So you see, your inserted coin undergoes a lot of checking before it gives you the cola can!

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