Device: S3C2440 development board Phenomenon: After restarting the device, it is easy to cause the PC to freeze, and the keyboard and mouse have no function. Operation: When the PC is communicating wi...
It seems a bit inappropriate to write about this topic on the first day of 2013, but I wrote it when I remembered it. Many new employees in the workplace should also have many dreams when they enter t...
Background: 138 is connected to the base of a pnp tube after output. The pnp acts as a switch. The collector is connected to the dot matrix, and the emitter is connected to the 3.3V power supply. The ...
[b]Being cheated, netizens should never buy the Ulong development board[/b] The board is terrible, and the service is even worse! I am so angry! I told the netizens in the group that many of them are ...