Read about high voltage | 28 Discussions | Page 1

  1. gregory112

    Troubleshooting a homemade Van de Graaff machine

    I'm trying to build a Van de Graaff generator, but it does not generate any charges. The problem is, I don't know which part is accidentally shorted, or grounded. I use both PVC pipes for the top and bottom rollers. The belt is neoprene rubber, 1mm thick. The rollers are bolted on aluminum...
  2. M

    Noninverting op amp doesn't work on a highly resistive load

    Hi, I am using an Apex PA443DF operational amplifier to drive a sinusoidal signal at 100 V amplitude across a very large resistor with resistance of about 5000 Mega ohms. The amplifiers are set up as noninverting with a gain of 22 and function very well for small resistive loads. The sinusoids...
  3. M

    High voltage power supply

    I'm looking for a high voltage power supply. I have no experience with such a power supply, nor with all the terms or specifications used for such tools, so I'm looking for general suggestions to what to look for. I want to generate an electric field or potential field between two points a few...
  4. hagopbul

    Asking about the Vcc of some integrated circuits

    Hello: I have to ask some question , did any one know any integrated circuits that have voltage Vcc of few kilo volts what was the catagoeries of that circuits ? And do they different from high current integrated circuits ? Where to read about it ? Best hope
  5. G

    I Let current from a Van de Graff generator flow through you

    Hi. I have two questions about the following video with a 200'000 V Van de Graaff generator: At 5:57 he touches ground, apparently feeling nothing. He explains this with a very low current and proceeds that the current from a 120 V outlet is high and might kill you. But with ##I=U/R## and...
  6. T

    High voltage in a small package (interplanetary civilization that communicates via particle beam)

    << Mentor Note -- thread moved to the Sci-Fi writing forum after starting in the technical forums >> Hey folks, I'm interested in the feasibility of providing high DC voltages (~kV) in a physically small and low mass package (~grams). The power source does not actually need to be very energy...
  7. patric44

    I Is this just a normal fluorescence of glass molecules?

    hi guys i recently had built a HV power supply out of an old Flyback transformer i had laying around , i think it produces about 10KV ~ 15KV not very sure but it could arc at about ( 6mm in air ) , and as you can see i tried to connect it to a 15W smal light bulb ( the positive terminal...
  8. C

    I Monitor restarts when I make an electric arc

    Why does my laptop's screen refresh every time I bring a metal object (any size) to my electric lighter? -Happens when I am 1 foot away from the laptop -1 foot away from the external monitor's wires (HDMI & power) 1. Video footage (MUST WATCH) NOTE: the laptop screen also flickers a bit NOTE...
  9. astroscout

    High Voltage Discharges or Explosions from Powerlines -- why these colors?

    Hi.....Here is a GIF of some electrical explosions that I recorded with my full spectrum camera. These power lines supply power to a neighboring county so it didn't affect my area. In the upper atmosphere we see something similar in Transient Luminous Events (TLEs). In the case of the blue in...
  10. J

    Measuring 800V AC signal with 16-bit DAQ card within 1% accuracy

    I'm trying to measure high voltages with a DAQ card. Obviously I'm going to have to attenuate the voltage, but I need to make sure that I can measure accurately (within 1%) The code width of the DAQ is Vcw = 20Vpp/2^16 = 305.176uV For this code width to be within 1%, the minimum voltage I...
  11. C

    I Stream inside paraffin oil when exposed to high volage

    Here is the experience: I put two electrodes inside paraffin oil (separated by at least 3cm), and submitted the electrodes to high voltage. At 20000 V - 30000 V, strong streams can be observed inside the paraffin oil. Since paraffin oil is a good dielectric, I just would like to understand the...
  12. Abdul Wali

    Transformer Oil Testing

    Hi, when it comes to Transformer Oil testing, there are some parameters that we need to consider but i don't understand their definitions and i can't find their explanations online, so may someone please define these terms for me that what these terms actually mean? the terms are as follows...
  13. C

    Soldering High Voltage Capacitors

    Hi guys! Im fairly new to the forums so thank you for having me here :) I just wanted to ask some of you guys here who have a better knowledge about high voltage capacitors than me. I am creating a lightning impulse voltage generator as my final year project and have been provided with most of...
  14. J

    B High Voltage in a Cloud Chamber?

    Hello all! Firstly, thanks for reading this post! I am a high school student attempting to make a basic, dry ice cloud chamber. I have made several cloud chamber designs and I am about to start making it. However, before constructing the product I would appreciate some members to provide...
  15. I

    Generating High Voltage?

    Good Afternoon everyone, Question: What are some effective ways to generate a high voltage (Multiple KV) using amateur equipment? I've dealt with high voltage before, so I'm aware of the safety issues. Anyway, here is what I've got thus far: If you go on ebay, and search for high voltage power...
  16. steltzer

    Understanding relationships in Induction Heating circuits

    Hi Everyone, I will try to keep this short as I can and to the point, there is a bit of a back story, so bear with me. For the last 18 months (on and off as life allows), I have been trying to develop an induction heating assisted machine for 2 reasons. 1 - To learn as much as I can by doing...
  17. 1

    Sub $100 Low minimum High Voltage DC probe (3kV minimum)?

    Hi I'm looking for a suitable high voltage prob for my research project. I'm in contact with voltages that can have transient spikes as high as 3.0kV but my DVM only measures up to 1kV and 97% of the time im under this range. I bought this and it was perfect the only problem is that it has a...
  18. K

    B How to conduct electricity through water without electrodes?

    More specifically, how to conduct electricity through water without submerging electrodes into water? I can't think of other way except using high voltage to arc across air into water, but this method only work for high voltage. Any ideas? Thanks
  19. C

    Amplify opamp output voltage

    Hello, I need an opamp that can output +/- 150v without paying $500 for a high voltage opamp. I need a workaround solution, I'm thinking of a 5x DC gain of the opamp output voltage but I am totally clueless on how to achieve this. Any ideas?
  20. K

    Honeycomb structure of oil due to an electric field

    Hi, I've been working on a problem for some time now and I can't figure out why exactly this happens, and I've been looking for some insight. The phenomenon can be seen in this video. We can see that the oil rearranges itself due to a high-voltage electric field. Thinking about this, my...
  21. Dare Diamond

    Maximum Voltage To Apply To An Air core Electromagnet

    Hello everyone. I am glad I came across this science oriented Forum site. I actually get there from Google and what I am deeply curious to know about is the amount of Maximum Voltage my 3.5kg Air Core Electromagnet can bear. The Core of the Solenoid is 120mm in height and 13inches in...
  22. C

    Selecting the correct power source for a Cockroft-Walton Multiplier

    Hello. I'm in the process of selecting materials for a voltage multiplier. I need to be able to vary a DC voltage source from 0-6kV, possibly with a regulated current up to 20mA...
  23. Michael George

    Which is better to connect a bulb switch ?

    I was installing a new bulb with a switch in my house. There was two different ways to connect the bulb and the switch as shown in the picture. Which one is better and Why?
  24. Michael George

    A circuit breaker does not work properly?

    I live in Egypt where we use 220V AC / 10 A. When I turn light off at a circuit breaker, all lights turn off but both mains ( hot & neutral ) become hot. When I test them, they both have electricity (live), so I afraid to touch them. I would expect that they both become neutral ... Why does that...
  25. S

    Electrical DIY Electrical Feedthrough

    I want to build high voltage feedthroughs (vacuum) from epoxying pieces of alumina together, and then epoxying alumina strips on the outside to cover the spaces between. Can I use JB weld, as far as things go electrically? People have reported that JB weld is unexpectedly wonderful for vacuum...
  26. Z

    Will electron create gamma-radiation?

    If we put cathode rod with enormouse voltage in vacuum between strong magnetic fields pointing down paralel to rod end then put electron in it with initial speed equal to speed of light and begin circling around cathode, Will electron make gamma -rays according to synchrotron radiation?
  27. C

    Electrostatic Precipitator to Contain Graphite Powder

    Hi all! This is my first post here and I really hope you guys can help! I am currently in senior design at Purdue Fort Wayne in the MET department. I also own a company called Graphite Customs where we make graphite molds for glass blowers. When machining graphite, the powder is very abrasive...
  28. FuturePhysicist

    Fusion Reactor Power Supply.

    Hello, I'm 15 and very interested in physics. I'm building a safe nuclear fusion reactor as a science project. (I know how to safely handle high voltage and radiation) I have a question about the power supply. First off, I know that fusion takes around 40 Kilo-volts and it needs to have a...