I am building a custom low-power Arduino board using a SMD ATmega328 and as few components as possible.
I have drawn a schematic and want to get some opinions on whether this design looks good.
I have used the Gammon website as my base, however I am trying to use a SMD chip rather than a THT chip for space reasons, so I'd like someone to check it.
At this point I have a USB as power as I will be powering it using a 5v boost module which has USB output. I would be happier to incorporate the boost module into this circuit if I can, but I need to know if this will work first.
Unless you have above average soldering skills, a project using a TQFP form factor is not for you.
Making your own SMPS can be quite difficult, you need to use the recommended components (avoid substitutions) all recommended component placement is a necessity.
ready made boards/modules are inexpensive, less than what you can manage.
Suggest you use a boost/buck converter instead of a boost or buck converter.
That is a good idea to keep in mind for future projects, however I think this design should fulfil my requirements slightly better. According to the manufacturers datasheet, this chip will supply 5v even when the input voltage is very low (lowest working voltage is 1.2v. Whether it still outputs 5v at that voltage is the million dollar question).
I didn't realise that. That's very interesting.
As yet I don't have a GND plain - I forgot about that. Gonna go YouTube it...
Notice the manufactures foil pattern for component layout.
You see copper pours for interconnections and not seen is the copper pour on the reverse side.
From your data sheet for the regulator, this is a proven foil pattern that the manufacture has tested and works for the components in their suggested schematic.