China's biometrics is represented by fingerprint recognition, and its commercial application began in the early 1990s. The theoretical research on the automatic fingerprint identification system (AFIS
## DIY small communication system - FM transmitter (88MHz-108MHz communication frequency band) with a transmission distance of up to 1000m ### 1. Design content Use the communication principle and the
Pre-match preparation,
Speaking of pre-match preparation, let me first talk about my major. My major is electronic information. My teammates are also majoring in electronic information like me, so in
It has been a while since I reviewed the Arteli AT32F425, and the overall feeling is very good. Next, I will review the OLED screen. Since the OLED on hand is 128*128, the driver is SSD1327, and I hav