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Preparing for Fast Charge

A project log for Little Flash

Little Flash runs for twenty minutes, charges in ten seconds.

Mike RigsbyMike Rigsby 05/17/2019 at 20:405 Comments

Using available materials, I'm preparing for the first "pretty quick charge" test.

Using painter's tape to secure the 3000 farad capacitors to scrap plywood, I wired in an automobile starter solenoid (rated for about 300 amps). 

I plan to stand about 15 feet away (and operate the entire setup on concrete) when I connect "9000 charged farads to 1000 depleted farads." It should be interesting and will probably occur Monday, May 20.

Discussions

ajileyejosephkayode7 wrote 05/20/2019 at 09:28 point

I don't think MOSFET are strong semi-conductors.

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ajileyejosephkayode7 wrote 05/20/2019 at 09:25 point

Please I need full details about this fast charge or quick charge test.

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Daren Schwenke wrote 05/18/2019 at 02:07 point

Perhaps I'm stating the obvious, but why risk the inrush?  There are plenty of mosfets more than happy to handle this kind of current and then you could PWM it to control the charge rate.

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Xasin wrote 05/18/2019 at 13:10 point

Probably get a nice beefy inductor and build a more efficient step-down regulator with current control too :>

Why risk the inrush though?
I'm guessing the tingling excitement of potential explosions? <.<

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Daren Schwenke wrote 05/18/2019 at 15:11 point

So put on some Rush, and feel the rush of the inrush?

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