Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: robotcoder on October 11, 2010, 11:10:30 PM

Title: ToolBot Phase 1
Post by: robotcoder on October 11, 2010, 11:10:30 PM

Below is a schematic for the Sabertooth, Spektrum, and power source that I am planning to use for my robot.  I am posting this image because I am still learning and would like your opinion on changes that you would make and places that I have messed up.  Any help is appreciated. 

http://www.robotcoder.com/images/ToolBot-Phase-1-Schematic.jpg (http://www.robotcoder.com/images/ToolBot-Phase-1-Schematic.jpg)

(http://www.robotcoder.com/images/ToolBot-Phase-1-Schematic.jpg)

Here are the url's for some of the parts that are included in the schematic

Power Distrubution Board - http://www.superdroidrobots.com/shop/item.aspx?itemid=829 (http://www.superdroidrobots.com/shop/item.aspx?itemid=829)
Sabertooth Custom Dual 25A RC Motor Driver - http://www.superdroidrobots.com/shop/item.aspx?itemid=1001 (http://www.superdroidrobots.com/shop/item.aspx?itemid=1001)
24V 10000 mAHr NiMH Battery Pack - http://www.superdroidrobots.com/shop/item.asp?itemid=832 (http://www.superdroidrobots.com/shop/item.asp?itemid=832)
Spektrum DX6i Transmitter with BR6000 Boot Receiver - http://www.superdroidrobots.com/shop/item.aspx?itemid=915 (http://www.superdroidrobots.com/shop/item.aspx?itemid=915)

Title: Re: ToolBot Phase 1
Post by: madsci1016 on October 11, 2010, 11:16:18 PM

What's the point of the $120 power distribution board, other then some fuses? It doesn't even look like you are using the current sense output.

Title: Re: ToolBot Phase 1
Post by: robotcoder on October 12, 2010, 07:59:58 AM

I will eventually use the current output, and possibly connect an additional battery. 

Title: Re: ToolBot Phase 1
Post by: madsci1016 on October 12, 2010, 09:34:11 AM

You can use something like this (it's what i use on my robots)

(http://www.robotshop.com/Images/big/en/attopilot-voltage-and-current-sense-breakout.jpg)

http://www.robotshop.com/attopilot-voltage-and-current-sense-breakout-2.html (http://www.robotshop.com/attopilot-voltage-and-current-sense-breakout-2.html)

to sense current and voltage, and it's only $20. Good for up to 50V and 90 Amps.

That, plus making your own wiring harness with fuses and power switch, and you could save $100 for something else. Just something to consider.

Title: Re: ToolBot Phase 1
Post by: robotcoder on October 12, 2010, 09:02:52 PM

Thanks for the suggestion, I will consider using that. 

Title: Re: ToolBot Phase 1
Post by: robotcoder on October 12, 2010, 09:09:58 PM

Does anyone have any issues with the way I have connected the battery and battery charger.  I want to make sure that what I am doing is safe.  Also, here is an image of the battery, motor, and chassis.  Let me know what you think and what I could improve.

(http://www.robotcoder.com/images/ToolBot-Phase-1.jpg)

(http://www.robotcoder.com/images/ToolBotPhase1_chassis.jpg)

Title: Re: ToolBot Phase 1
Post by: madsci1016 on October 12, 2010, 09:29:26 PM

Quote from: robotcoder on October 12, 2010, 09:09:58 PM

Does anyone have any issues with the way I have connected the battery and battery charger.

Safe practice would be to have a fuse in-between the battery and charger.