The MQ series sensors are widely used low-cost sensors, commonly applied in gas leak monitoring devices in homes or factories. This article introduces the use of the MQ-2 smoke sensor from the MQ family, and other MQ sensors operate similarly.
The sensitive material used in MQ series sensors is a highly
This article mainly introduces how to use the fingerprint sensor module FPM10A on the Arduino development board. We will show you how to register a new fingerprint ID and how to find a matching fingerprint.
Introduction to Fingerprint Sensor Module
By using the fingerprint sensor module shown in the figure below, fingerprint recognition can be made easier to implement and easy to add to your project. This means that fingerprint acquisition, registration, comparison, and search are very easy to achieve.
2024-12-26
In recent days, friends from the south have been coming to Beijing to experience the haze, and many have expressed that although the haze in the south is moist and elegant, it cannot compare to the richness and depth of Beijing's haze. I have also heard that the haze in Hebei is rough and bold, but it lacks a bit of cultural depth.
The haze must be appreciated for its accumulation; the old haze of Beijing is indeed thicker than the
