Asked
— Edited

Ok so in preparation for my V4 coming i'm buying last minute things. one thing that's needed is a way to convert the voltage from the board to 5 volts for sensors. This is what a came up with.
Yes or no?
If I missed something let me know.
2) I would recommend using the LM1084 instead of a 7085. The LM1084 has less drop-out voltage, more amperage and therefore generates less heat.
Cheers
Richard
Why would you not just run the board off of 5-7 volts and then you wouldn't need anything else.
Why do you need 12volts to the board?
Just curious.
5v switching voltage regulator
We have to remember that it is talking about a v4.
Why would you want 12volts going into the board?
If you do that then every output pin will be putting out 12 volts.
Way to much for servos and sensors.
Wouldn't it make sense to put the 12volt battery into a high amp adjustable drop down board and then into the v4.
You would then be able to place the input voltage at any thing you want, or needed.
@RichardR I like using the sla batteries too.
You just can't beat then for power and amperage.
I have three of them in my big bot.
Two for the 24volt motors and one to run the mini motherboard and EZB stuff.
That said, are you sure 5A will be enough? How many servos etc. will run from it? It only took 2 TowerPro MG995s to brownout my V3.
Adjustable regulator
http://www.eachbuyer.com/5-30v-to-0-8-28v-dc-boost-buck-converter-5a-constant-current-volt-regulator-p238353.html?currency=USD&utm_source=google&utm_medium=CSE&utm_content=[Consumer+Electronics]&utm_campaign=[PLA]America%28EN%29&gclid=CKbd-fXKu74CFVQFMgodQggAYw
It's a cheap one and I believe it only truly has buck capability (no boost). It's small and gets the job done. It may take a little tinkering to get the trimpots adjusted correctly since there's no instructions. One trimpot sets the voltage and the other sets the current limit, from what I can tell. I got a couple of these and they seem to work fine.
{Disclaimer: I never used this seller or this product.}
DC-DC Adjustable Voltage CC CV Buck Converter 7-32V to 0.8-28V 12A 300W
(DC 12V/24V to 7.5V) (20A 150W) (STEP DOWN) DC/DC Power Converter Regulator