Explosive Fun with a Capacitor Bank

Watch a 24kj capacitor bank as it discharges through various objects. Maniacal laughter follows each one and a slo-mo montage finishes it all up. via Make blog

Topic by fungus amungus 10 years ago  |  last reply 10 years ago

Explosions for football game

I am a chemistry teacher and I need to make a set of explosions for the football team to run through. The run on the field and the explosions go off on each side of them Any ideas. I may fill a dozen metal coated baloons with hydrogen and, and ignite them with some sort of electric spark strong enough to pepetrate the baloon. I'll put six of them on each side of the path that the team runs out through under the goal post. And how will I make the system to spark them off (electric plug in?)(capacitors, tesla coils, etc.?) thanks

Topic by ChemNut 11 years ago  |  last reply 11 years ago

What will happen if i use a capacitor that has a farad measurement that is less than what is required ?

The voltage limit is properly matched, only the farad measurement is not the same. IMPORTANT WILL THE CAPACITOR EXPLODE?

Question by La Tour Rouge 10 years ago  |  last reply 9 years ago

can electrolytic capacitors catastrophically fail or explode if they are shorted out? Answered

My father (an electrical engineer) told me that if a capacitor is charged and than shorted out than it can fail, possibly with explosive results. However I have seen way to many Youtube videos of capacitor banks being shorted and nothing but a big spark happening. Who is right? Can anybody help me?

Question by junits15 10 years ago  |  last reply 2 years ago

Need help identifying a capacitor (from a drill that exploded in my face!) SOLVED

Help! I am incapable of identifying this capacitor.The capacitor says KPB 7301 B9 0.15 μF +2x 2500 pF XY 250V~, and I'm not entirely sure what this means, and what I need to maybe buy to replace it. is it a .15 microfarad one, two 2500pF in one, or both?While drilling a small hole in aluminum, the drill suddenly made an insanely loud explosion sound. Freaked the spinning drill bit out of me. I took it apart and found this exploded capacitor I need help identifying, to replace. It's an old drill that also powers my mini circular saw and bench grinder, SKIL 1437 H1.Thanks!

Question by Yonatan24 10 months ago  |  last reply 5 days ago


So, my circuits professor described electrolytic capacitors today, and said that reverse-biasing them could cause a catastrophic, eye-popping explosion. All that in a little metal can? I had to try it! Here's what it takes:

Topic by stasterisk 11 years ago  |  last reply 11 years ago

Rockford Fosgate R500X1D repair help?

I have a Rockford Fosgate R500X1D that is having issues. It lasted a while but then there was a loud "pop". It still worked, but it could only go so far. I took it apart and found a bulging capacitor. I have already replaced the capacitor with one that had the same specs. After the swap, It worked for a few minutes but then there was another "pop". I took it apart again and found a discharge(?)/burn(?)/explosion(?) mark on the bottom of the enclosure right beneath the new capacitor. I can't recall if there was one there before or not. This time, however, the capacitor seems to be fine but the amp is still acting up and i'm not too sure what the problem is. Any help or ideas would be appreciated. Thanks.

Question by knex.gun.builder 4 years ago  |  last reply 4 years ago

Discharging high amounts of amperage in a very short time.

Previously I asked this question, except I wanted to build an electromagnetic dent puller. But no one gave me specific ideas or instruction of how it could be done, instead everyone told me different ways to pull the dent out, or how the metal looks.. Anyway. I have a lot of copper wire. And I have a bunch of magnets and ferrous cores, iron rods.. etc. I am wondering if I can create a very powerful burst of magnetic energy with a few winding's of copper around a ferrous core. I'm talking enough to push two very heavy objects apart, such as a television or couch... 1) Copper will be wound around about 40-60 times 2) High amperage discharge from capacitor bank 3) Possible explosion or melting wire? Thank you... again

Topic by Justdoofus 6 years ago  |  last reply 6 years ago

I tried to create a 2 led driver from the mains. Can you please check it? Answered

(This is just an experiment) The first circuit failed due to my mistake of using polarized caps. I replaced it with non polarized now. Can you please check if it would work? I don't want a loud explosion again :) Capacitors: 0.47uF 250V LED: 3V White Diode: 1N4004

Question by codestroy7 7 years ago  |  last reply 7 years ago

Can anyone make this and post an instructable? Answered

See the schematic and these are the parts and please make a breadboard version IC1: LM555 Timer IC Q1: 2N3906 PNP transistor R1: 100K potentiometer R2: 3.9 Kohm resistor R3: 10 Kohm resistor R4: 47 Kohm resistor C1, C3: 0.01-µF disc (non-polarized) capacitor C2: 1.0-µF electrolytic or tantalum (polarized) capacitor Speaker: 8-ohm, 0.5-watt speaker(i also tried a buzzer) Photoresistor: I used a LDR aren't they the same? The buzzer goes off(not off. it's like explosions"The bomb went off") when light hits the photoresistor.

Question by Hafiz Mohammad Shayan Tariq 6 years ago  |  last reply 6 years ago

Supercapacitor for power supply design?

Hi I am new to electronics but I have studied the basics and the logic. I have 6 3000 farad supercapacitor from Maxwell(not the boost cap one) with a power rating of 3 watt- hour, so each capacitor holds about 10.8 kilo watts(3 watt x 3600 seconds= 10,800 watts). So I have been wanting to make a power supply out of these and two types have ran across my mind: 1. Turning them to a voltage multiplier type of circuit( so like a voltage multiplier but the capacitor is these capacitors). So I would have an output of 500 amperes(6 3000 farad capacitors in series would have a capacitance of 3000f/6=500f) and output voltage of 16.2 volts. For charging this power supply I will use a step down transformer connected to the mains with some circuit breaker, fuse, switch and ballast/ resistor at its input, the transformer will step it down to approximately 2 volts ac which then I will rectify with a bridge rectifier. 2. Putting them in parallel so I would have a total capacitance of 18,000 farad at 2.7 volts, and putting them in parallel with my power supply. So this works by charging the bank and the bank will discharge when fully charged. The power supply will be the same like the first design power supply. However this circuit seems very risky and I might need some feedbacks. For your information I live in Indonesia and the wall outlet have 220 volts with amperage of ~20 amperes So I have some questions which are: Q1. Which power supply design is more ideal in terms of safety and efficiency? And how can I improve? Q2. For power supply design 2, I believe I might need some "system" for timing the charge and discharge of the bank,what circuit or system should I use/ make? How about using relay? Or spark gap? Q3. What should I do to avoid explosion of capacitor in both power supply Q4. What components are recommended for the charging power supply and what diodes are recommended for the design one capacitor bank? I already have the thick wires necessary for this since i know both systems deliver huge amount of power. And please inform me if there is any mistake or anything wrong. Any input is very greatly appreciated, you don't meed to answer all question since i know is a lot and i don't want to waste anyone's precious time. Thank you so much for your time.

Question by dikap123 4 years ago  |  last reply 4 years ago