I have drawn out a project with multiple power options.
I am wondering if any of these reverse current protection diodes can be left out.
If the double pole double throw switch can be replaced by a double pole switch.
And if the boost converter can be left out in order to attempt to run the amp on 5v when the 12v is not connected. And can I just use 2 diodes to protect the 5v circuit when 12v is connected?
And if the boost converter is there, does it still need reverse current diodes?
I circled in orange some sections that I think might be changeable.
More info
One or all of these may be connected at once.
1.An internal battery in the form of a 5v portable power bank.
2.12v power jack.
2.Usb B used for midi but also supplying its 5v.
There is also a micro controller. So a need for somewhat clean 5v.
There is a amp that is 8-24v but could possibly work at 5v with low volume. Dirty power would effect sound quality.
When the 12v plug is in, it feeds the amp directly and feeds a 5v step down converter to power everything else.
Voltage drop from too many diodes could be a problem.
A 3 position switch is used to charge/disconnect/discharge the battery.
This is for a handheld musical instrument with a built in speaker. It could be desk mounted for long term use with battery disconnected or handheld with a portable battery and some about of sound over the internal speaker.
The amplifier used might be a bad fit but the choice was between one that was way too big or one that is almost definitely too small. At least the bigger one has better heat dissipation. They both cost under $2.
I hope have not been too wordy or trivial. I am just nearing the end of this project and I know that I might not even be going about it the right way. Any help will be appreciated.