[size=5][color=rgb(62, 62, 62)]1. When the TTL circuit drives the COMS circuit, if the high level output by the TTL circuit is lower than the lowest high level of the COMS circuit (usually 3.5V), then...
1. Permanent magnet motor is an electric motor that uses permanent magnets to provide a magnetic field. For a motor to do work, two conditions are required: one is the existence of a magnetic field, a...
[i=s]This post was last edited by xld0932 on 2019-4-19 12:25[/i] [font=Tahoma][size=3] Overview: The latest AT file on Espressif's official website is the ESP8266 AT Bin V1.7.0 version released on Aug...
Read image. Get pixels and print. Mat src_image_ = imread( "/home/jack/test2.jpg"); Vec3b bgr = src_image_.at(src_image_.rows/2,src_image_.cols/2);cout"B="If you don't force the conversion, the output...
[i=s]This post was last edited by dql2016 on 2022-1-23 19:08[/i]Currently, many products with Bluetooth functions can be connected to WeChat applet or mobile app, so it is very interesting to learn ho...