So I need to control a 12 volt servo using an outside power source. I'm assuming I need an H-bridge to handle the power but I can't wrap my head around the wiring specifically the signal wire. I have standard Pololu H-bridges (see below). I've worked with H-bridges and EZ before.
If my assumption is wrong could it be as easy as wiring my servo to my 12 volt power source (with a common ground to the EZ) but use a fuse (for protection) and then use a signal wire to my EZ for control? I've seen postings here that seem to say that. The action is to raise and lower a robot head. It will require 12 volts.
Any advice is always welcome.
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If you are using one of the previous boards, or you are using a different voltage to the new board, or you do not want to draw too much amperage from the board, your second assumption was correct. Here is a picture. I left the fuse out, but you get the idea.
This is my last question of the day.
So my heavy duty servo just grinds when I activate it. The head seems to be locked in position and I can't even force it.
I've restarted EZ but no change. It just whines and grinds.
Is it likely shot?
If that's the case, open it up and check the gears inside to make sure they are all aligned nicely. I had a few Tower Pro MG90s which were stuck and needed to be opened up and reassembled before they wanted to work.
I was very lucky.