small engine digital tachometer

• 2022-10-13

We have small engine digital tachometer , size is 85mm. Please check below picture:

Small engine digital tachometer , there is a magnet on the rotating object. Each time it passes through the Hall IC surface in the small engine digital tachometer , the Hall IC generates voltage (current). The circuit in the tachometer tests this voltage, which is displayed on the nixie tube after A/D conversion. The measuring time of the digital speed instrument is optional, such as 1 second and 10 seconds. If the 1 second gear is used, 60 pulses will be generated per revolution. The pulse gear generated by the gear is 60 teeth. The photoelectric sensor can also be used, with 60 holes. If the 10 second gear is used, 6 pulses will be generated per revolution The gear has six teeth. The tachometer is matched with the sensor, and it also displays the number of revolutions per pulse measurement cycle.

In the early years, there was no small engine digital tachometer on cars, which was analog speed, that is, mechanical speed. The mechanical tachometer can directly and accurately display the current speed of the car. Secondly, the early stage is limited by the sensor acquisition accuracy, real-time, reliability and cost factors. But now this condition is no longer tenable. Now many people choose digital tachometers.

In fact, the models on the market basically put a display screen between the traditional tachometer and the speedometer. This screen has experienced the development from scratch, and then has experienced the monochrome dot matrix color LCD screen of black and white chip code screen. At the same time, the size of the screen is also expanding. If the display screen used is an LCD screen with a size equal to the whole instrument, it is called a full LCD instrument. At present, the full LCD instrument is no longer the exclusive configuration for luxury models, but also for ordinary household cars. According to the normal logic , the vehicle speed, speed and other information can be digitally displayed on the LCD instrument to accurately reflect the actual value and avoid overspeed caused by pointer misreading. But except for some pure electric vehicles, the mainstream models on the market are not only digital displays, but also basically retain tachometers and speedometers. Even many supercars use LCD screens to simulate the mechanical sense of hands and dials.