Capacitor Bank Question

Rifleman · Aug 12, 2013

So I'm in the process of building a dmr "ish" aeg m4. I'm trying to emphasize decent range, accuracy, semi auto trigger response while keeping it relatively compact and under 400fps. Anyways I bought some capacitors to improve the trigger response. They are 5.5v .33F each so should I make a 11v capacitor bank or should I make it 16.5v?

I know the easiest solution would be just to get an three cell lipo, but I wanted to use NIMH batteries cause they're less temperamental... I know how to properly use a lipo (I use 7.4 lipos in another build),but Its still annoying to keep them at the correct levels...

Any other suggestions are welcome too, I'm not quite clueless about DC circuits but I'm not too far away from that either.:shrug:

11v or 16.5v capacitor bank?

mad scientist · Aug 12, 2013

Theres a reason people moved to 11.1v lipos and mosfets...cause they are way better than NIMHs and capacitor banks.

But to answer your question, do whatever gets you the higher discharge rating.

Dorekido · Aug 12, 2013

capacitor banks is out date. Lipo and mosfet is more better.

sanguinor · Aug 12, 2013

There's no reason you can't move to a cap bank + Lipo and Mosfet. I have done experiments and research into the Cap banks that you're looking and and I hooked three up in series to make a 16.5v because the voltage of the cap bank should be roughly 50% more than the batteries you are running through it.

And to clarify here guys; he is looking at super caps they have 100x the amount of capacity that regular capacitors have and my three cap bank is no bigger than an 8.4v NimH battery

If you have the space make one up and put ti in because they do appear to offer a performance boost.

woogie · Aug 12, 2013

A lipo and a good fet is going to be much easier than trying to get a set of caps. wired up correctly.

Heck I have a gearbox that would be great for your build

sanguinor · Aug 12, 2013

I stand by my point that this:

Is not hard to get, or to make. In fact grand total of cost was about £10.

Rifleman · Aug 13, 2013

Thanks for the replies guys... I was trying to avoid lipos for reasons stated and because I already have a 4200mah 9.6. I'm planning on getting a full stock to fit all the electronics, also a mosfet is on my list of things to add at some point. I've got a lonex a2 high torque motor coming on Wednesday which should help a lot.

Thanks for chiming in sanguinor, I think it might've been one of your posts that I learned about cap banks in the first place.

I think I'll make it 16.5 volts like you said. If I get around to actually doing this in the next week or two I'll try to post my results.

In a couple months I'll probably break down and just get a decent 11.1 lipo but this should keep me busy until then.

woogie · Aug 13, 2013

That looks much easier to make than what I was thining.

Make a write up of what you did so others can give it a go as well.

sanguinor · Aug 13, 2013

If the weather here in sunny England is as crap as it is predicted later I will knock a write up together (I might even break out the soldering iron and make another one, time dependent).

Rifleman, you're very much welcome. I built mine to couple with a 12v NimH battery to go with my pre-cocking project, not because I'm against Lipo's but because I'm a skint and finding budget ways to do stuff is my forte!

Capacitor Bank Question

Rifleman

mad scientist

Dorekido

sanguinor

woogie

sanguinor

Rifleman

woogie

sanguinor

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