In the schematic diagram, the second pin of R1 is connected to the LED, but after importing to PCB, the second pin of R1 is connected to GND. In addition, R2 to R8 are all connected to the LED in the
First of all, I would like to thank EEWORLD and National Technology for giving me the opportunity to evaluate the development board. I have been evaluating the development board for one month from the
With the development of technology and the integration of products, voice chips have gradually replaced a variety of voice devices and are used in various occasions. The main features of voice chips a
[align=left][font=宋体]It's Wednesday in a blink of an eye, I really want to go to bed. In line with my brother-in-law's principle of not leaving unfinished work unfinished in the new year:hug:, I climb
ATX switching power supply, no 5V standby voltage, standby voltage control chip SDC606P 1 pin startup voltage changes from 2V to 7V, the voltage is gone after about 5 times, the 2nd pin VCC voltage ph