[i=s]This post was last edited by dcexpert on 2019-4-30 11:30[/i] An old Komi fingerprint card reader, which can be disassembled and used for learning. [color=#ff0000]It will be delivered if you pay f...
I am studying a circuit and I would like to know what controls the frequency of its oscillation, the role of the PNP transistor and the role of the diode D1. I hope you can give me some advice....
The switching power supply chip NCP1236, after the short circuit and overload test, the circuit protection lock is turned on. After removing the short circuit and overload, there is no automatic recov...
2021 is a busy year for the zigbee IoT module industry. The demand for zigbee modules is growing rapidly, but the shortage of semiconductors has led to tight module supply. The zigbee IoT module marke...
After double-clicking this exe to install,Always prompt that the specified program cannot be executedI have tried the following:
Re-downloaded several versions of the installation package, failed.
I c...