Simple Microphone Amplifier Compared with transistors, field effect tubes have the advantages of high input impedance, low noise, large dynamic range, strong anti-interference and radiation ability, a...
Continued from the previous post: [url=https://bbs.eeworld.com.cn/thread-492205-1-1.html]UFUN Learning Board: Are the analog and digital courses in college so difficult? [/url] Before the Dragon Boat ...
I'm a newbie. I tried connecting the M22 module on the experimental box, but there was no response. The manual said that I need to connect the antenna. Can an expert tell me how to connect the antenna...
October 21, 2013The courier was such a rip-off. Two couriers arrived in the morning, but I only sent one text message. I had to run so far to pick up the items, and I ran twice. This board is not dire...
Can you solve this number puzzle? It is a four-digit number. The first digit on the left is 7. If this digit is moved to the last digit, the number must be reduced by 864. Find this four-digit number....