Asked
— Edited
I have already asked and got an answer for this but just noticed that the saber tooth help page says something different. Quote: The EZ-B connects to the GND, +5 and Signal to the Sabertooth. The Signal from the EZ-B connects to S1 on the Sabertooth.
Got that the signal goes to s1 but then there r the other 2 that are different.
Here is the page from the Sabertooth manual for my 2x12. The 5v output from the Sabertooth can only power small loads up to 1 amp.
I personally don't use the 0 and 5v on mine. I always power my electronics separately from my motor control circuits to help eliminate any potential electrical noise problems. When you use a separate battery for the EZ-B is when you need to make sure you connect the commons together as shown in Technopro's first drawing.
Also if you think about it, basically you would be hooking 5v to the 5v regulator input on the EZ-B. I have never tried using a regulator with an input voltage that is the same as the output voltage.
I still learn new things daily, which is great
This kind of thing is where I'm still rusty so it's great to see all the info and comments.
From the looks of it the 5V on the Sabertooth is only 1A though, which may cause problems if running high power servos like the Tower Pro MG995s (which I have just had to supply externally from the EZ-B due to browning out the LCD and possibly being the cause of disconnections).
@Danger!, you are correct. If powering the EZ-B from the Sabertooth, you would connect the +5 and Ground to the Barrel jack instead of the existing power, but @Rich has a good point about the limit being 1 amp. That may not be enough to power all of the servos and other devices connected to the EZ-B (and now I need to re-think my plan).
Alan
5a 6v regulated supply from the battery to supply the servos would get around the 1a limit. Simple with a basic regulator like the one I have in Melvin. Or multiple regulators if you have a lot of servos. Sensors etc. Should be fine for the 1a of the sabertooth... maybe.
Food for thought
ok. thanks for all the comments.
so my drawing is correct for powering the ez-b with a separate battery.
I will only be using it for one micro servo at first and then 2 more normal servos later for a camera movement. and quite possibly a distance sensor.
to power all that I would want the ez-b separate from the sabertooth power, right? like in my first drawing?
That seems to be the consensus, Technopro.
ok thanks @Danger!