I have a lithium ion battery powered device that I would like to allow plugging in a wall wart to power it as well.
If I put a diode on the lithium ion battery, would this prevent causing an issue to the battery when I connect the device to the wall wart supply?
Thanks,
Sean
As genebren already said, using Schottky diodes is the way to go because of their low drop voltage. This principle is also used for power switching on some of the Arduino boards. I made a circuit similar to this recently and it worked great for lower power devices, but struggled on something more power hungry like the Raspberry (due to the drop on the 5V rail and the 7805 not being able to handle such current).
Milos
As genebren already said, using Schottky diodes is the way to go because of their low drop voltage. This principle is also used for power switching on some of the Arduino boards. I made a circuit similar to this recently and it worked great for lower power devices, but struggled on something more power hungry like the Raspberry (due to the drop on the 5V rail and the 7805 not being able to handle such current).
Milos
