At present, the commonly used wireless network standards mainly include the 802.11 standard (including 802.11a, 802.11b and 802.11g) formulated by the American IEEE (Institute of Electrical and Electr...
[i=s]This post was last edited by cruelfox on 2021-4-17 15:49[/i] The Vidonn wristband I scrapped last time has many components on the board, but few GPIOs. I can't use so many external things at the...
After mounting the chips according to the circuit diagram, the voltage at VCC3V3 is not 3.3V, but 4.6V. After C46 is replaced from 22pF to 330pF, the voltage at VCC3V3 is 3.3V (the required voltage is...
[i=s]This post was last edited by sunboy25 on 2021-6-3 11:15[/i]I would like to ask if anyone has the reference for active filters in Chapter 3 of Circuit Design Based on Operational Amplifiers and An...
The national electronic competition is still difficult. Within the specified time, that is, 4 days and 3 nights, we need to make electronic competition questions with high standards and high requireme...
[i=s]This post was last edited by Yunhu Congbai on 2022-9-3 15:28[/i]Ask for forgivenessIn fact, I had already received the board a long time ago, printed out the chip manual, and read it many times.I...