Quote:
Originally Posted by Andrew Schreiber
Please please please put some breakers on this thing. From what I can see you have two bus bars mounted on a 2x4. Screams fire to me.
[snip]
Please spend the $30, just the peace of mind is worth it...
Sorry to be a wet blanket on this, it looks like a good project but I'd really like to not hear when it catches fire.
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Listen to this, a normal FRC battery will have ~800kJ of energy. That's equivlient to a 160kg mass moving at 100m/s (someone check my physics please). You don't want to lose control of that. (Check out videos of spanners flying when shorted accross batteries)
Also, are you using what looks like an AC light switch? Please check that this switch is rated for a reasonable DC current/voltage. DC dosen't have regular "zero-crossings" which makes it more prone to arcing on disconect. I've seen cases where 240VAC switches have fused closed when used with 12VDC. If this is your only disconect point, you may end up with no good way to disconect the battery if you get fault currents (short circuits).
OT: Looks great. Please post a copy of your software if you get a chance, I'd be interested in taking a look.