Connecting the ends of the air hose. Drawing, description

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Connecting the ends of the air hose. Tips for the home master

Builder, home master

No matter how you tighten the ends of the air hose with a clamp or wire, no one can guarantee the strength of the connection: the internal air pressure will do its job.

But what if the force of this pressure is used to securely fix the hoses relative to each other? I embodied this idea in a specific design - a clutch. Its base is a body resembling a car tire (made of metal, of course). Radial slots are cut into the body, into which four levers are inserted. Inside the case is another "car tire" - this time made of elastic rubber.

Connecting the ends of the air hose

The clutch works like this. Two hoses are inserted into it, each from its own side, into the holes intended for them, and pressure is applied to the system. The elastic tire, inflating, firstly, tightly compresses the ends of the hoses and, secondly, presses on the levers, the opposite ends of which compress the hoses, preventing them from slipping out of the coupling. When the pressure is released, the hoses can be easily removed.

I hope that the coupling I proposed will find application in enterprises where it is necessary to quickly and reliably connect hoses, connect pneumatic tools to the main line.

Author: N.Tatarinov

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Two-wire digital temperature sensor TI LMT01 06.10.2015

Texas Instruments has introduced a new LMT01 digital temperature sensor with a resolution of over 0.1°C and operating on a two-wire line. The temperature is output as a number of pulses, which is directly proportional to the measured temperature. The result pulses go along the same lines as the sensor power supply. This method does not require the formation of precise delays and greatly simplifies the microcontroller program - it is enough to apply power to the LMT01 and then count the number of received pulses.

Depending on the temperature, LMT01 generates from 26 (-50°C) to 3218 pulses (+150°C). The value of each pulse is 0,0625°C. Pulses follow at a frequency of 88 kHz and can be counted in different ways: programmatically, in an interrupt from a signal change on the port, or using a timer in counter mode.

The accuracy of LMT01 temperature determination is not worse than 0,5°C in the range -20...90°C (0,7°C in the entire range from -50°C to 90°C). The sensor consumes only 34µA during the conversion, which takes a maximum of 54ms, after which the LMT01 outputs the conversion results for a further maximum of 50ms. Thus, the full cycle "measurement-reading" fits into 104 ms (max.), while the pulse current does not exceed 143 μA, which allows LMT01 to be successfully used in battery devices. Sensor supply voltage from 2 to 5,5 V (between Vp and Vn pins).

Due to the digital nature of the measurement, LMT01 is not sensitive to interference and can be placed up to 2 meters from the device. The number of pulses issued is converted into a temperature value using a simple formula:

Temperature (°C) = (Number of pulses / 16) - 50

In its ideology, LMT01 is close to the popular DS18B20 sensor, but surpasses it in ease of control, accuracy, current consumption and conversion speed.

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