Why does my 8*8 dot matrix only flash after adding a delay, instead of being on for a while?#includereg51.h#define uchar unsigned char#define uint unsigned intuchar code table[]={0xfe,0xfd,0xfb,0xf7,0
I would like to ask you a question: Now there is a 4-channel analog voice card. A calls B first, but B's phone is all busy. However, after 30-40 seconds, a dialog box will appear in front of B's compu
The charging circuit of a mobile power bank generally obtains energy from a computer's USB port or a mobile phone charger. A mobile phone charger generally provides 5V1A power, and a computer USB prov
[i=s] This post was last edited by qwqwqw2088 on 2014-6-24 11:58 [/i] [backcolor=rgb(255, 255, 255)][font=宋体][size=12px]PowerInt's LYTSwitch-4 series products LYT4211-4218/4311-4318 combine the contro
Directly on the picture:The VCC_DC in the picture is 12V, and there is voltage only when charging. STDBY is the status indicator pin of the charging chip. When it is fully charged, the MOS tube on the
Could you please provide the test method and basic test principle? There are two embedded devices, A and B, with the following main parameters: Model A: CPU: Arca-GT2000 Main frequency: 330MHz File sy