[size=4] When making instruments with DLMS protocol, foreigners asked for remote firmware upgrade function. Since it was the first time, I sought help from the manufacturer, but the process was too co
Almost all designers of ultra-low-power systems are concerned about battery life. How often does a fitness tracker battery need to be recharged? And for a disposable battery system, how often does a t
[b]2. Typical collector DC circuit of NPN transistor with positive power supply (part 2) [/b] [align=left] [color=rgb(34, 34, 34)] [font="] The figure below shows the typical collector DC circuit of N