The functions I want to achieve: 1. Phone operation (including making and answering calls) 2. SMS operation (including sending SMS, receiving new SMS, deleting a specified SMS, receiving the number of...
I built a controllable gain circuit based on the circuit in Figure 2 in the datasheet, and found that the output waveform was distorted. When I turned on the frequency limit when observing it on an os...
For an electronic system now, the design of the power supply part is becoming more and more important. I would like to discuss some of my own experience in power supply design with you to start a disc...
Today, almost all public accounts, friend circles, and WeChat groups are discussing Japan’s decision to discharge Fukushima nuclear waste water into the sea. According to experts’ estimates, half of t...