My lover is eight years younger than me. Since we met, I have always played the role of a father and a brother, and my lover has always been so dependent on me. We have been through many ups and downs
[size=4]1. PWM is a pulse width modulation signal. Note that the "width" is the high level time of the pulse. When the PWM signal adjusts the brightness of the LED, the signal frequency remains unchan
I recently encountered a big problem when using 8276 to collect voltage. Four or five chips were burned. After analysis, it may be caused by excessive internal current. The problem is as follows: the
PCB circuit design and pre-production work 1. Annular Ringrefers to the copper ring that is flat on the board surface around the through hole wall. On the inner layer board, this annular ring is often