Hello! I am trying to find a VRM that can output 3.3v & 6v. If that combo doesn’t exist, which converter would you recommend? The 6v is needed to run HSB-9380TH’s, which are these extremely-powerful, reliable servos that my personal robot requires. The 3.3v is just a simple Feather MCU.
Also, I am controlling two bag motors using the BTS7960 Motor Controller. These can be supplied up to a 27V. I am planning on just directly connecting my 14.8v LIPO to the controller the BAG’s, which only draw 12v.
Which DC-DC converter would you recommend so I can achieve 3.3v and 6v from a 14.8v LIPO?
The specific combo will be hard to find off the shelf, I’d recommend just getting two modules.
The main things to be looking for in a DC-DC converter:
Input voltage range - for this, I’d say pick something that’s ok with 16V down to about 9V at least. You want to ensure whatever system voltages you’ll see from your battery under load won’t cause the regulator to drop out.
Output Current Draw. Your servos stall at 2.7 A. I generally recommend picking the worst-case current draw, then multiply by a safety factor of 1.5. Not knowing the number of servos, nor what sort of loads they’ll have, this isn’t something I can spec well…
Efficiency (or power loss) - if long battery life is a concern, ensuring the regulator itself doesn’t waste wattage is important. Not sure how much this will matter for your setup.
For searching for these, I usually just end up on amazon.com for the fast shipping, and (usually) reasonably accurate ratings. Here’s one 6v option, and here’s an option which can do 3.3v. Again though, see the above 3 criteria to see if it actually fits your application.
Also, is there a board that can take in let’s say my 14.8 voltage and output 4 more lines of the same voltage. I don’t want to have to get multiple wire splitters
Look up bus bars, they are your friends here. I’m reading this as a need for a power distribution system. Also if you are on a real shoe string budget, just connect the battery to a piece of copper and connect everything else to the copper as well. That’s pretty sketchy though.
Bus bar, distribution block, terminal block–though that last would require you to get creative with fork terminations on your wires–they’ll all work. You might even be able to use a 4-circuit terminal block and run a short jumper to an adjacent terminal for each side of the voltage to get more capacity.