How to live in the forest without a tent. Travel Tips

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How to live in the forest without a tent. Travel Tips

Tourist tips

You can live in the forest without a tentif you do the simplest thing at night, run away from the wind and rain (see picture).

Separate elements of the base (frame) are connected by thin spruce roots, willow branches. A piece of synthetic film will allow you to spend the night tolerably under an even simpler shelter (see figure).

Natural cavities in the steep bank of the river serve as a convenient shelter, and the place to sleep should be between the fire and the vertical surface (cliff, rock), which serves as a natural reflector of heat. Given the time and minimal equipment (sleeping bag, blanket, piece of cloth), some comfort is provided by a small canopy for the upper body (see picture).

When preparing a place to sleep, prepare small pits for the thigh and for the shoulder (bottom picture).

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MAX20343/MAX20344 converters 15.07.2021

Maxim Integrated has mastered the production of the new MAX20343/MAX20344 switching voltage regulators for use in compact, portable battery-powered devices. The MAX20343/MAX20344 is a fully integrated solution that combines a controller and power transistors in a single package that can drive loads up to 1A at 3,5V output.

The power section of the MAX20343/MAX20344 microcircuits is built on a non-inverting buck-boost circuit, which allows them to be used with primary energy sources, the voltage of which can be either higher or lower than the required output voltage. At the same time, special attention was paid to the functioning of the microcircuit in cases where the input voltage is approximately equal to the output: thanks to the unique transistor switching algorithm in these modes, it was possible to avoid sudden voltage fluctuations on the load and reduce the level of electromagnetic interference.

The key benefits of the MAX20343/MAX20344 are high efficiency (provided by flexible power section configuration and adaptive power switching algorithm), ultra-low internal current consumption, starting at 3,5 µA in operation and decreasing to 0,3 µA in standby mode, small levels of output voltage ripple and electromagnetic interference. The combination of these advantages makes the MAX20343/MAX20344 ideal for medical applications, such as portable photoplethysmographs, whose measurement accuracy is directly dependent on the levels of ripple and noise in the power supply circuits of the optical measurement system.

The high speed of response to transient processes, including sharp fluctuations in the input voltage, allows these microcircuits to be used to power devices with a sharply changing load, for example, wireless sensors of intelligent automated systems using LPWAN networks. In such applications, low power density primary power supplies are often used in conjunction with supercapacitors. In this case, the ability to work at an input voltage of 1,9 V allows you to maximize the installed power of the supercapacitor and increase the battery life.

Another area of application for the MAX20343/MAX20344 chips are the Truly Wireless Stereo Bluetooth headphones. With a large voltage difference between the batteries of the case and the headphones, the latter, due to a decrease in the efficiency of the integrated chargers, begin to warm up, which can cause some discomfort when using them and leads to waste of a limited amount of battery power in the case. In this case, the use of MAX20343/MAX20344 chips will reduce the voltage supplied to the headphone chargers, which will lead to less heating of their cases and more rational use of the battery power of the case.

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