Hexapod robot buck converter

148

01:27:37

I'm building an hexapod robot with 18 mg995 servos. Video here: 
https://youtu.be/si1gMbXttUo
It uses a 3S lipo (12v) and for now a 160W buck converter set to 4.5V. I use an arduino due as mcu and i'm writing code with trigonometry and IK all by myself. In the circuit you can see how the new buck converter will work :-)
-niki

published 9 years ago

hurz

9 years ago

Vgs and Vce is in a 60V range which might be dangerous for both transistors

nikisalli

9 years ago

How would you make the bootstrap?

hurz

9 years ago

You know my concept.

nikisalli

9 years ago

The robot's power supply part is referenced obviously to the gnd of the battery so i can't use your design

hurz

9 years ago

Wait, you never specified how your system does look like and what else you add on. Question: 30V were does they come from, and for me its too high (12V would be.better) and why is there more connected? The overall concept is complete unclear to me and I just look on a black box system. BB: 30V 4.5V out - nothing else

nikisalli

9 years ago

Before i wanted to make something as a bench power supply working at 30V but i have one that gives 1.5A max and is good for me. Now that i'm making this hexapod robot i noticed that the 160W buck i took for it gets hot after 2-3 minutes so i want to build one more efficient that can support high current without melting

hurz

9 years ago

And this "160W buck" thing gets input what, 12V?

nikisalli

9 years ago

Yes

nikisalli

9 years ago

It's a red board on one side of the robot

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