I have a custom 5V Arduino design which is essentially an Arduino Nano clone. The USB to UART conversion is done through the wildly popular FT232 chip. However, I also wanted to add a bluetooth device such as the HC-05 to program and operate the Arduino wirelessly. At any given time, either the wired USB interface or the BT should be able to talk to the Arduino. This means that if the BT is ON and if the USB cable is plugged in, BT module would be turned OFF. Also the Arduino is not powered by the USB bus but by a separate 5V supply. This 5V supply would also power the BT module. In this case would the attached circuitry work?
The other idea is to use something like this load switch and have the VBUS line connected to the enable (active low in the 'B' version) pin. Any thoughts?
The other idea is to use something like this load switch and have the VBUS line connected to the enable (active low in the 'B' version) pin. Any thoughts?