Hi,
i have one following doubt on connection,
i have one arduino pro mini board and i have connected it to external power supply and connected prolific usb to uart converter (RX,TX and Ground pins only).
When i disconnect my external power supply then my board is getting power through USB-UART converter even though i didn't connect Vcc pin to pro mini through USB-UART converter.
How to avoid such power supply problem and why this is happening?
i have one following doubt on connection,
i have one arduino pro mini board and i have connected it to external power supply and connected prolific usb to uart converter (RX,TX and Ground pins only).
When i disconnect my external power supply then my board is getting power through USB-UART converter even though i didn't connect Vcc pin to pro mini through USB-UART converter.
How to avoid such power supply problem and why this is happening?