AVT5573 A + - uncomplicated thermometer - recorder. PCB board and programmed layout

Description

Knowledge about the current temperature is information that we use every day and many times. Probably because of this, projects of electronic thermometers are very popular. Sometimes, however, in addition to the knowledge of the current temperature, information about temperature fluctuations over a longer period of time is equally useful. This is important, for example, when assessing the state of food stored in a frozen state. For its quality it is not safe accidental, periodic heating and re-freezing. The thermometer-recorder allows you to remember temperature changes, and then recorded measurements can be viewed as a line graph of temperature as a function of time.

Recommendations: the whole device consists of 10 elements. It is small, adapted to battery power and thanks to that it can be used for measurements anywhere.

Project AVT 5573 EP 11/16

properties

• Range of measured and recorded temperature: -55 ° C ... + 125 ° C (limitation of the upper range of the measured temperature will be permissible, maximum working temperature of the used SD card)
• Supply voltage: +2,8 V ... + 3,3 V (the lower range of the supply voltage depends on the used SD card)
• The period between consecutive temperature measurements: constant, 10-second
• Time needed for measurement and recording on the SD card: about 2.5s
• Power consumption during measurement and recording: about 10 mA
• Current consumption between measurements: from 100 mA to 400 mA (depending on the used SD card and operating temperature)
• Number of cooperating measuring elements: 1 ... 8 items
• The file format saved on the SD card containing measured temperature data: text

Included

• PCB board and programmed layout