Updated Charging Circuit

Update 4/21/08: Click here for the latest wiring schematic.

A few weeks ago, I’d posted my simple charging schematic that I’ve implemented in my Artoo. It allows me to switch between normal usage or battery charging. I’m not an electrical engineer by any stretch of the imagination, and my wiring diagram wasn’t very elegant, but the setup worked fine.

Bob Ross pointed out that I really didn’t need to isolate the ground connections in the system while charging. This would save me one relay, and power to run it. He was kind enough to redraw the simplified circuit for me, and also came up with an improved design which allows me to run my droid (low load systems) from an external 12VDC power supply while the batteries charge.

Now that I have my new 60A relays I’m hoping to wire this up over the weekend, but thought I’d share it here first.

[PDF Version]

Thanks again Bob :)

Posted by Chris on January 24th, 2008 in Electronics | 3 Comments

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3 Responses

  1. Chris Simonds remarks on

    whats a 60A relay??????

  2. Paul Novak remarks on

    Beautiful work on the charging system. One newbie question: Does the diagram show you having 36V going to the electronics?

  3. Chris remarks on

    no, the batteries are configured in parallel to give just 12V.

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