Does anyone know the customer service of Benq m22/m23 module? Can I use M22/M23 to achieve GPRS connection and receive SMS at the same time without using multi-channel?
In PCB proofing, alumina ceramic substrates have been widely used in many industries. However, in specific applications, the thickness and specifications of each alumina ceramic substrate are differen
Is there any relationship between the input voltage and power supply voltage of the CD4051 analog switch commonly used in circuits? As shown in the following figure: VCC = 5V, the input voltage in the
I would like to ask you how big the high and low levels can be recognized by the 51 microcontroller? For example, if I generate a square wave from P1.0 internally, what are the high and low values of
I am learning the vlfft routine now, but after running it, the result only shows one line of operation time, and no simulation results. I don't know what I did wrong. How can I get simulation results
[i=s] This post was last edited by Peng Binghao on 2019-5-7 21:07 [size=6]DIY Modified Power Supply Current Display Digital Tube [/size] [b][size=6]Preface [/size][/b]: I bought a DC power supply. Bef