dhruv_electro
Advanced Member level 4
I want to build a circuit using which I can select the output power source using Arduino GPIO. I am trying this one:
In this circuit I am trying to switch a power supply to some load. Selection is between 14.8V external Power supply and 5V (Arduino's Power Supply). I want output to be selected when logic needs it.
Problems in this circuit / Help required:
1. If I turn on Q1, the 14.8V can go back to Arduino's 5V supply, because of the internal diode of FDD4141, which can damage my board. (Already damaged one board).
2. I have selected this FDD4141, because I have this one. Please suggest if I should use any other more suitable and cheaper part.
In this circuit I am trying to switch a power supply to some load. Selection is between 14.8V external Power supply and 5V (Arduino's Power Supply). I want output to be selected when logic needs it.
Problems in this circuit / Help required:
1. If I turn on Q1, the 14.8V can go back to Arduino's 5V supply, because of the internal diode of FDD4141, which can damage my board. (Already damaged one board).
2. I have selected this FDD4141, because I have this one. Please suggest if I should use any other more suitable and cheaper part.