The figure below is the audio preamplifier circuit diagram. A, B, and C are three pins used for external switches. When AB is connected, the gain is 20db, and when AC is connected, the gain is 40db.Wh
[i=s]This post was last edited by hujj on 2020-11-25 09:54[/i]Voice control of household electrical appliances is an important part of smart home and a focus of my test. Initially, I planned to use th
What is an IoT platform?
Alibaba Cloud IoT Platform is an integrated platform that integrates capabilities such as device management, data security communication, and message subscription. It supports
The program uses a constant array to store Chinese character libraries. When this array is commented out or not, the compiled code size is the same, both 127.67Kb. Is there any setting required?