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Old 10-22-2011, 01:52 PM #113
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

5A max at 30V.

Yeah I'm going to upgrade the alligator clips once the caps show up. If I charge at a constant voltage of 10V I would expect 5A to be fine going through these clips... is that right?

I power my laptop at 2A 19V for more than 6 hours at a time with no problems. Do you think I should invest in a car battery charger?


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~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

488nm - On the hoist
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Old 10-22-2011, 11:59 PM #114
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

the caps will want to pull way more than 5A from the supply from when charging so your supply will be maxed out for the whole charge until it starts to drop off at the end as each cap approaches 2.7V.

Im using a 10A 30V Variable power supply and some 1.5mm2 lighting circuit cable to charge mine and im dropping 0.6V on the cable at 10.6A.

I used alligator clips the first time and it was dropping so much current it melted the insulation away from the clip after a while lol the cable is pretty small in those leads im guess they are like 0.5mm2.

You will probably want something with more grunt
ive got this: Digital Adjustable Variable DC Power Supply 30V 10A S 3010D BLUE LED | eBay
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Old 10-23-2011, 05:38 AM #115
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

Or I could get a 12V car battery charger @20A for like $60 at Bunnings.

I guess I'll just have to see if it works or not with the PSU I have here.
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Jetlasers wrap around 190-540nm OD4+ goggles*
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Old 10-23-2011, 06:04 AM #116
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

you can do that, but you will find you will have balancing problems when charging in series
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Old 10-23-2011, 09:13 AM #117
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

Why so? What would be the difference between your 10A PSU and my 5A PSU?

You know they are limited.... even if it wants to draw more than 5A it can't.
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593.5nm - Regal 5
542.8nm - Green He-Ne laser ~2.5mW
532nm - 620mW+ lasersman Firedragon III* - 100mW PGL-III-M from JETLASERS* - 70mW Rayfoss Host*
~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

488nm - On the hoist
473nm - 2x CNI lab lasers ~40mW
445nm - 3W Big Boyz Laser - >1.1W Cree C6 Host - 650mW WL Arctic
405nm - 65mW GLP-405 Aquarius host - 160mW 6x Blu-ray MXDL Host
Total: 71,868.5 mW

Goggles!
Laser glow LSG-532-Sport protective eye goggles OD 7+ 190-532nm HIGHLY RECOMMENDED!!
Jetlasers wrap around 190-540nm OD4+ goggles*
Eagle Pair Red OD4+ goggles
Scopeguy20 Blublockers for 405nm lasers!

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Old 10-23-2011, 09:29 AM #118
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

There will be no difference in balancing the capacitors on the 5A or 10A PSU.

The capacitors aren't all the same capacitance, some will charge faster than others, so there is potential to overcharge a single cap in the bank, but if you stay away from your 13.5Vmax then you should be good, just check each capacitor in the bank to make sure they are close enough in voltage when charging.
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Old 10-26-2011, 07:42 AM #119
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

Hmm, I can't find any 2.7 volt or lower chargers at home so do you think that charging with 5v and metering the voltage would work? I've seen people charge it like that but im not too sure if its safe. I don't want this thing blowing up.
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Old 10-26-2011, 08:06 AM #120
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

Sounds like a job for a voltage regulator circuit
you could use some resistors to setup a series voltage drop too
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In Progress:
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OEM Lasers OD 5+ 190-435nm & 730-1085nm

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Old 10-26-2011, 08:11 AM #121
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

Ikr, I guess I'l just finish off my PSU, I really can't be bothered doing crap atm tho I've had a tiring week...
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Old 10-26-2011, 08:39 AM #122
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

Finished my cap bank!!! YAY!!





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Lasers!
10.6um - >40W CO2 Laser - 25W RF excited CO2 Laser*
685nm - Being built!
660nm - 250mW LOC PowerLight B50 Host - 100mW WL pulsar
635nm - 430mW C6 Host*
632.8nm - Red He-Ne laser ~1mW
593.5nm - Regal 5
542.8nm - Green He-Ne laser ~2.5mW
532nm - 620mW+ lasersman Firedragon III* - 100mW PGL-III-M from JETLASERS* - 70mW Rayfoss Host*
~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

488nm - On the hoist
473nm - 2x CNI lab lasers ~40mW
445nm - 3W Big Boyz Laser - >1.1W Cree C6 Host - 650mW WL Arctic
405nm - 65mW GLP-405 Aquarius host - 160mW 6x Blu-ray MXDL Host
Total: 71,868.5 mW

Goggles!
Laser glow LSG-532-Sport protective eye goggles OD 7+ 190-532nm HIGHLY RECOMMENDED!!
Jetlasers wrap around 190-540nm OD4+ goggles*
Eagle Pair Red OD4+ goggles
Scopeguy20 Blublockers for 405nm lasers!

* indicates a review has been done, on this item.

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Old 10-26-2011, 08:41 AM #123
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

Nice work bruv! You charged em up yet?
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637nm - 5105mW (8)
660nm - 1,850mW (5)
670nm - 600mW (1)
685nm - 40mW (1)
808nm - 2,700mW (3)
RGB - 400mW (1)

In Progress:
405nm - 500mW+ Kryton Groove
445nm - 2,000mW+ C-88
520nm - 50mW Ultrafire RL-118 SS
632.8nm - 0.5mW Mini HeNe

Safety Glasses
2x Eagle Pair OD4+ 190nm-540nm
2x Eagle Pair OD4+ 90-400nm & 580-760nm
OEM Lasers OD 5+ 190-435nm & 730-1085nm

LaserBee 5W Laser Power Meter


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Old 10-26-2011, 08:43 AM #124
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

Not yet.... literally just finished them...

Do you recommend that I charge them to 10V first? Just in case they become imbalanced? That will give you ~2V per cap.
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Old 10-26-2011, 08:50 AM #125
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

yep thats a good idea, the first time i charged mine i was checking each cell every so often.

some formulas for charge time and rates:


Max energy = 0.5 x C x Vsquared = joules


Capacitors In series Capacitance = 1/ (1 / C1) +(1/C2) + (1/C3)
Vtotal = V1+V2+V3


Charge Rate = Charge Current / Bank Capacitance= (mV/Second)


Charge Time (seconds) = Vtotal / (mV/Second)

---------------------------------------------------------------------------------------------------------------------------

So you will be looking at:


5 x 2.7V = 13.5Vtotal

1 /3000 = 0.003333
1 / (0.003333 x 5) = 600 Farad

0.5 x 600 x (13.5x13.5) = 54,6750 joules

say 5A charge current:

5A / 600 Farad = 0.008333V per Second

13.5Vtotal / 0.008333V = 1620 seconds /60 = 27mins
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Old 10-26-2011, 09:14 AM #126
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

Good Job Adrian!

Heres my lonely cap...



Looks deadly
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Old 10-26-2011, 09:16 AM #127
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

Cool and at 10V I'll be looking at only 20min charge time. Nice! I'll charge these up soon!!!
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10.6um - >40W CO2 Laser - 25W RF excited CO2 Laser*
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660nm - 250mW LOC PowerLight B50 Host - 100mW WL pulsar
635nm - 430mW C6 Host*
632.8nm - Red He-Ne laser ~1mW
593.5nm - Regal 5
542.8nm - Green He-Ne laser ~2.5mW
532nm - 620mW+ lasersman Firedragon III* - 100mW PGL-III-M from JETLASERS* - 70mW Rayfoss Host*
~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

488nm - On the hoist
473nm - 2x CNI lab lasers ~40mW
445nm - 3W Big Boyz Laser - >1.1W Cree C6 Host - 650mW WL Arctic
405nm - 65mW GLP-405 Aquarius host - 160mW 6x Blu-ray MXDL Host
Total: 71,868.5 mW

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Jetlasers wrap around 190-540nm OD4+ goggles*
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Old 10-26-2011, 09:18 AM #128
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Default Re: GB: Australia Ultra-Capacitor *Collecting Money*

yup

make sure your supply leads aren't too small cause they will increase the charge time cause current will be wasted on them.
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In Progress:
405nm - 500mW+ Kryton Groove
445nm - 2,000mW+ C-88
520nm - 50mW Ultrafire RL-118 SS
632.8nm - 0.5mW Mini HeNe

Safety Glasses
2x Eagle Pair OD4+ 190nm-540nm
2x Eagle Pair OD4+ 90-400nm & 580-760nm
OEM Lasers OD 5+ 190-435nm & 730-1085nm

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