Hacked Gadgets Forum

July 16, 2010

11.3 Kilojoule Capacitor Bank

at 8:01 pm. Filed under Complex Hacks, DIY Hacks, Electronic Hacks, Insane Equipment


Our friend Daniel Eindhoven from Megavolts found a great price on some huge used capacitors. These capacitors normally cost around $90 each, Daniel was able to pick them up for around $2 a piece! That is one hell of a huge capacitor bank on a nice budget. He also designed an interesting mechanism to tie the batteries together. Instead of using wire or busbars he designed a few laser cut sheets of metal and PCB. The PCB is acting as an insulator between the two metal sheet conductors. So the next question is how does one switch that type of power? The light switch at Home Depot is not going to cut it. 🙂  Have a look at the High Current Pneumatic Switch that was designed just for this type of application, be sure to watch the switch in action below.

“My new capacitor bank is finished! This bank holds 38x 4700uF and 2x 3300uF capacitors of 350V in parallel (total 0,1852 Farad). It can hold a maximum energy of about 11344 Joule.


Capacitance: 185200uF
Voltage: 350V
Energy: 11343,5 Joules
Conductors: 4mm aluminum sheets
Weight: 44,1 kg
Dimensions: 385 x 613 x 182mm
Costs: €208,52″


Viagra erectile erectile what the and known viagra . Get a medication cure dysfunction...

Related Posts

Capacitor Bank Discharge Experiments
Inductive Current Sensing
Bypass Capacitor Tutorial
DTMF Phone Dialer – PIC Microcontroller Based
DIY Induction Heater
Double Resonance Solid State TeslaCoil uses a Capacitor Bank integrated into the Primary Coil
How to Build a Tiny Surveillance Spy Bug
DIY In Circuit Capacitor ESR Meter



11 Responses to “11.3 Kilojoule Capacitor Bank”

  1. Weiss Says:

    Nice cap bank 😀

  2. Chris Says:

    nice. maybe i may suggest one little improvement:
    your switch bounces 1 or 2 times. this eliminates steady current flow und your current flow through the coil is interrupted badly. if you can fix it, you’ll have much better effects and efficiency. maybe you can built your switch more like a regular connector, with a female and a male part.

  3. Pouncer Says:

    Actually wouldn’t a wide flat contact work better than the pointed one?
    You’d get less deterioration at the point of contact.

  4. Jurre Says:

    This guy builds some great stuff, but he really has to work on the music he puts in his videos.

  5. DrRogla Says:

    Yes Chris… Maybe you could put the point on some rubber or spring backing that will absorb the punch…

  6. My what a large capacitor bank you have - Hack a Day Says:

    […] [Thanks Kurt via Hacked Gadgets] […]

  7. Insane DIY Capacitor Bank! Says:

    […] via hackedgadgets Tags: capacitor bank, diy capacitor bank, insane Categories: Circuits, DIY, Featured DIYs, Featured Gadgets, Featured Hacks, Gadgets, Hack, Projects. GA_googleFillSlot(“Zedomax_Bottom_Right”); […]

  8. Daniel Says:

    The bounce really is a problem, a lot of energy is wasted by this and the concept of a mechanical switch. I do get good suggestions to prevent the bouncing action, and I’ve come up with a few good solutions as well.

    But I think I’m going to leave it and try the hockey puck thyristor. I didn’t try them before because I wasn’t sure they could handle these currents. Now I’m pretty convinced they can.

  9. Berni Says:

    Thats one huge cap bank. Might be a better idea to series together a few caps to get more voltage as that gives you higher peak current and that kind of mechanical switch works better at higher voltages.

  10. Gio Says:

    $2 – what a score!

  11. Gomez Says:

    ARGH! It just breaks my heart seeing people spend huge sums of money and time building wonderfully pretty pulsed power gear that won’t work.

    A _mechanical_ pulsed power switch? Are you serious? May I suggest you do a bit more reading and grasping more theory before you waste any more time and money.

    And after assembling all that energy in a nice low-inductance bank, you have all of 350 volts to work with? Why even worry about keeping the inductance low, it’s not as if you’re ever going to achieve fast rise times or significantly high currents.

    Man. When you do that reading, maybe start with Ohm’s Law.

Internal Links:



Hacked Gadgets

Site Sponsors:

Nuts and Volts Electronic Labs Trossen Robotics Free Technical Publications Blue LED


Recent Comments:

More RSS Feed Options

Site Sponsors:


Interesting Sites: