Basic Power Supply Question: +12v, -12v, & 24v from 2 lead-acid 12v batteries?

[Scott Monaghan]

I came to robot building via programming so I am self-taught (and missed a lot of steps) for electrical engineering.

This is a basic question.

Right now for my larger bot I have 2 12v lead-acid batteries in series to have 24v off my power supply.

But would it be possible for me to get 12v & 24v without stepdown by creating 3 power rails:

1. +12v
2. - 12v
   
3. Combined for 24v?

Scott Monaghan

413.244.9344

scott.m...@gmail.com

www.linkedin.com/in/scott-monaghan

Resume: https://tinyurl.com/yxhq5eul

[Chris Albertson]

Yes this can work but there will NOT be a common ground for all three.

what you want is    

1.  0v (ground)

2. 12v

3. 24v

Then they both reference the same ground.   I suspect this is what you want and you want need any power that is 12 volt below your zero reference.

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Chris Albertson
Redondo Beach, California

[Scott Monaghan]

Thanks all!

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