As shown in the figure, the sensor head consists of two multi-vibrators consisting of a 1N914 diode and a 555. Diode D is part of the 555 oscillator discharge loop, and the oscillation frequency changes with temperature in proportion to the impedance of the diode. The 355 output oscillator pulse is sent to the frequency counter for counting to reflect the change in temperature.
Android is an open source mobile operating system based on Linux platform released by Google at the end of 2007, and then improved for use in netbooks and MIDs. The platform consists of operating system, user interface and application software, and is claimed to be the first truly open and complete mobile software for mobile terminals.
To put it simply, the Android system is actually a very open system. It can not only realize the functions of the most commonly used notebook computers, but also realize various directional operations like mobile phones. Moreover, it is specially designed for mobile phones. The operating system developed for equipment has advantages in system resource consumption and human-computer interaction design. It is an operating system that combines traditional and advanced advantages.
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