Orange or apple? Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Orange or apple? Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Invite the viewer to hold an orange in one hand and an apple in the other. When you turn your back on him, have him raise one arm above his head.

Then let him put his hand down. By looking at the apple and orange, you can tell which hand he raised up.

Focus secret:

You will recognize hands. The one he lifted will be lighter and the veins on it will be thinner, since the blood will drain down in the raised hand.

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Random news from the Archive

Miniature PMICs MAX77650/1 from Maxim Integrated 23.11.2018

Maxim Integrated has released the new MAX77650 and MAX77651 PMIC (Power Management Integrated Circuit) multichannel power converters for portable and wearable electronics.

The main feature of this solution is the innovative SIMO (Single Input, Multiple Output) buck-boost topology, which, with only one inductor, provides 3 independent output channels, each of which is configured separately. In addition, the microcircuit has a built-in LDO regulator and can charge a lithium battery. With the help of a bidirectional I2C interface, it is possible to both configure the microcircuit and read the current status. The output current for each channel may vary within certain limits, but the total output current must not exceed a certain value.

This solution is suitable for applications in which the issue of free space on the printed circuit board is acute. The solution area occupied on the printed circuit board can be as low as 30 mm2.

Technical specifications:

input voltage range 2,7...5,5 V;
total output current 300 mA;
frequency-pulse modulation;
the lithium battery charge current is adjustable in the range of 7,5...300 mA;
end-of-charge voltage adjustable in the range of 3,6...4,6 V;
maximum current LDO-regulator 150 mA;
three special configurable current outputs for driving LEDs;
own consumption current 5,6 μA (when 3 channels + LDO controller are working);
the solution area on the board is not more than 30 mm2;
housing WLP-30.

Typical applications:

portable electronic devices;
internet of things (IoT);
fitness and medical bracelets.

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