Hmmm thank you, that's a lot of good info.
I'm not using a resistive divider to lower the voltage. I'm using an LM217 LDO Adjustable Voltage Regulator, which uses a voltage divider across the output and adjust pins to set the output voltage (3.3V-30V@1.5Amax
I'm into protoyping, so I am learning to build 'machines' not just bots. I need to be able to build 'one off' boards for dedicated projects (e.g. Terrarium environmental control systems, smart cat toys, IR automatic toilet flushing devices, cleaning bots, etc). Ultimately, that board will be built around the 1284P.
So right now I'm just tinkering with creating my own power rails due to all the sensors.
Ideally, I would like to work with only two types of power sources; 7.2V batteries for the mobile projects, and 12V (various amp) DC wall power supplies for 'machines'.
The plan was to create a power supply board that took the input from the battery and then split it into a few standardized blocks for universal usage: 6V - servos, 5V - MCs and general electronics, 3.3V - sensors, and 1.8V again for certain sensors.
In trying to figure out overall capacitance and wattage, but...