When using a serial port on a development board to drive a GPRS module for debugging, there is no problem when using ordinary three-wire communication (transmitting and receiving), and both sending an
[i=s]This post was last edited by dontium on 2015-1-23 11:43[/i] [b]RS-232 to RS-485 Converters for Industrial Long Distance Communications[/b]Author: Thomas Kugelstadt, Texas Instruments TI Link: [ur
[color=#444444][font=Tahoma,]I used AD to draw PCB, and when I measured the distance by pressing CTRL+M, a cross appeared. But when I measured, [/font][/color] [color=#444444][font=Tahoma,]there was n
[size=5]This is a simple charger circuit with very complete functions. It uses a chip CN3068 and is very suitable for portable applications. The thermal modulation circuit can control the chip tempera