I need a smaller one of these!

[Igotu]

Could you tell me what this is and where I can get a smaller one I pulled it off of my spyder board.

[txaggie08]

radioshack, its just a common place capacitor.

[Igotu]

Thank you.

[Igotu]

So when im looking for a new one I kinda want to know what the 6800uf Stands for and if I have to get one with the same numbers?

[the electrician]

that is the firing capacitor. it is usually in parallel with the battery. it gives the 9 volt the ability to sustain voltage under the heavy load of that big honkin' solenoid in the spyder.

the 6800uF is the amount of capacitance in microfarads, the 16 V is the maximum rated working voltage.

you want to make sure you get another 16volt rated capacitor, and if you get something witha lower capacitance rating, then it will reduce the amount of shots per charge that you can get off the battery.

[Pneumagger]

hey E,

Not to argue or anything. But why would a 16V Cap use less power at 9V Cap than a 9v at, given the same capacitence? Just doesn't seem to make sense right now.

hey Igotu...
If you want the same power or are using the same solenoid, stick with the same rated capacitor. Just a note...a capacitors size is usually (but not always) indicitave of it's capacitence and voltage rating. I doub't you'll find a similar performing capacitor that is significantly smaller.
Find a 6 volt 10000uF or larger capacitor and try running two or more 9volt batteries in parralel to it. That will help.

Capacitors look awesome when they short and blow.

[Ydna]

You'll have to adjust the board setting to achieve the same effect, usually. On some boards it's not even adjustable.

You want to go with a cap rated to twice the voltage you're using, whenever possible.

For size reasons you could use two capacitors that will together add up to 6800-muF, or three, or four...or whatever. The physical size will get larger depending on the ratings on capacitance and voltage so most other 6800-mF 16-v caps will be a similar size, give or take a few millimeters here or there.

(edit, I just saw that he said that above me...maybe I should read the posts next time....)

[the electrician]

pneumagger-
you seem to have misread or misunderstood something. try reading it again.

"you want to make sure you get another 16volt rated capacitor, and if you get something with a lower capacitance rating, then it will reduce the amount of shots per charge that you can get off the battery."

the army figured out that using a capacitor that is rated at twice the working voltage of the voltage you are putting through it makes it last 8 times longer. it's all about reliability.

using a firing capacitor in general, is a must for any large solenoid. it is like night and day between using one and not using one. without it, the battery voltage plummets when the solenoid is energized, and the shot count will be pathetic.
maybe that's a better explanation than before.

anyhow, here's the deal: the best physical size to capacitance/voltage ratio in capacitors that I have seen is the NTE brand. they consistently make capacitors that are a bit smaller in physical size, compared to other manufacturers, for the same capacitance and voltage.

a few panasonic electrolytic type models are the same as the NTE size, but not all of them.

[Igotu]

My orignal concern for finding a smaller one is that I have run out of room in my intelli-frame
Ive got the board selinoid and 9volt battery in there but the capicator wont fit so im going to put it in an holowed out reg or gas thru grip if you guys have any good canidates for something that the capicator would fit in, let me know. Im thinking the carbon fiber foregrip from deadlywind would work good but I have to know if you can take the caps off at all.

[Pneumagger]

My orignal concern for finding a smaller one is that I have run out of room in my intelli-frame
Ive got the board selinoid and 9volt battery in there but the capicator wont fit so im going to put it in an holowed out reg or gas thru grip if you guys have any good canidates for something that the capicator would fit in, let me know. Im thinking the carbon fiber foregrip from deadlywind would work good but I have to know if you can take the caps off at all.

Just bore out a stick grip or other grip....I have a really ****ty one I cant get srewed off the vert asa that you can have. Just send shipping I'll get the grip and micromag asa out to you.

[the electrician]

you might think about doing something different before you run wires all over.

perhaps to smaller caps in parallel? you could put them into two separate places that the other larger one could not fit.

you could turn it sideways and drill out a spot inside the grips for it to protrude into maybe? done that myself when I needed 5 extra mm.

I would fiure out anyway I could to keep it with the rest of the electronics before I went to the option of moing it far away.

[Igotu]

you might think about doing something different before you run wires all over.

perhaps to smaller caps in parallel? you could put them into two separate places that the other larger one could not fit.

you could turn it sideways and drill out a spot inside the grips for it to protrude into maybe? done that myself when I needed 5 extra mm.

I would fiure out anyway I could to keep it with the rest of the electronics before I went to the option of moing it far away.

So if I use two smaller ones would I want to use two 3800uf 16v, I know nothing about electronics

[wjr]

Ive got a smaller capacitor. It's a 6800 10v. Its about the same diameter as a standard spyder capacitor, only its aboud a 1/4 inch shorter.

Mabye that would fit in your frame. Pm me if you're interested.

[the electrician]

no, you don't want to use a 10volt rated if you are going to run it at 9Volts or more(like rechargeables) your pushing your luck. that's one of the things I don't like about the original e-blade design.


Igotu- you could use two 3300 uF 16V caps and that would be close enough as a matter of fact 3300uF is a common size.

but you need to find some made by NTE or maybe panansonic to get the smallest physical size ones that you can get.