Index
High Voltage Power Supply Page
- 0 - 300V Adjustable Power suppy for safe experimenting - This simple circuit which can provide an adjustable voltage source of 0 to 330 Volt. This supply is short-ciruit proof: the current is limited to about 100mA. Rate this link
- Adjustable high voltage power supply - This circuit uses a pair of 555 timers to provide variable frequency variable pulse width drive to an inverter using a flyback transformer salvaged from a black and white or color TV or computer monitor. The input voltage can range from about 5 to 24 V. Using a flyback from a MAC Plus computer which had its bad primary winding excised, an output of more than 20 KV is possible (though risky since the flyback is probably not rated for more than about 12 KV) from a 24 VDC, 2 A power supply. By adjusting the drive frequency and duty cycle, a wide range of output voltages and currents may be obtained depending on your load. Many variations on this basic circuit are certainly possible. However, one nice thing about running it at 24 VDC or less is that it is much more difficult to let the smoke out of the circuit! Rate this link
- High-voltage circuits for electrostatic microphones - circuits that can generate the required high-voltage (50..300V) for electrostatic microphones used in bat detectors Rate this link
- Sam's Schematic Collection of various circuits - includes some high voltage circuits Rate this link
- Simple High Voltage Generator - The basic circuit described in this document is capable of generating up to 30 kilovolts or more from a low voltage DC source using the flyback (LOPT) transformer salvaged from a B/W or color TV or computer monitor. Typical output with a 12 VDC 2 A power supply or battery will be 12,000 V. Maximum output current at full voltage is typically around 1 to 2 mA. Higher currents are available but the output voltage will drop. At 2 KV, more than 10 mA may be possible depending on your particular flyback transformer input voltage and current. Rate this link
- 25-kV generator tests insulation - a car ignition coil can function in place of a high-voltage transformer to make high voltage source Rate this link
- Air Ionizer - 230V AC are changed in DC and they are multiplied in + 6500V roughly Rate this link
- Auto Air Purifier HV Generator - This thing is about the size of a hot-dog and plugs into the cigarette lighter socket (12V power). It produces a bit of ozone and who knows what else. Whether there is any effect on air quality (beneficial or otherwise) or any other effects is questionable but it does contain a nice little high voltage circuit. Rate this link
- Cockcroft-Walton Diode Voltage Multiplier Rate this link
- Electronic Air Cleaner HV Generator - This module produces both positive and negative outputs when connected to 115 VAC, 60 Hz line voltage. Each is about 5 KV at up to around 5 uA. It is assumed that this little circuit board is for an electronic air cleaner or something similar (dust precipitator, positive/negative ion generator, etc.). Rate this link
- High Voltage Generator - capable of generating up to 50KV, frequency of operation is around 1.2KHz Rate this link
- High Voltage Generator for Low Current Applications Rate this link
- High Voltage Generator for Flash and Geiger Tubes - very low battery current, pdf file Rate this link
- High voltage supply: 12VDC in, 12KV out Rate this link
- How Van de Graaff Generators Work - Most of us have seen the device, known as a Van de Graaff generator, that makes your hair stand on end. The device looks like a big aluminum ball mounted on a pedestal. Have you ever wondered what this device is, how it works, why it was invented, or how you might build one yourself? Rate this link
- Low power 12000 volt power supply - draws power from the 120vac power line but it uses a small 6KV camera flash trigger coil, output signal is isolated from the power line, circuit can only deliver about 5uA of current, pdf file Rate this link
- Negative/Positive Ion Generator - Ion generator powered by 110-240V mains supply. It uses the standard Cockroft-Walton multiplier circuit - a ladder of diodes and capacitors to pump the output voltage up to the level required. Rate this link
- Super cheap 1500V power supply (small LASER supply) Rate this link
- Tiny tiny inverter design - This is a little efficent circuit that runs off of 3V, and charges up a little 1 uf 250V cap all the way up in about 30 seconds. Rate this link
- Crazy Idea about Transformers - You can use two 500-1000 mA 117V to 12V transformers and few other components to generate around 300V output voltage for powering tube circuits. Rate this link
- 4kV-5kV 2000VA AC power supply - uses two microwave oven transformers Rate this link
- A High Voltage no resistor, no capacitor, regulated power supply - This article describes a power supply that can be used to provide relatively high voltage and moderate current for use in an audio amplifier (for instance 845 based). It provides a reasonably regulated 840 volts at up to about 100mA. The regulation is shunt regulation, which is usually sonically neutral. Rate this link
- Kevin's Strobe Schematics - 12 V to 300 V inverter for high repeat (1-10 times in second) rate medium power strobes Rate this link
- Bangbox - a high energy ignition system which produces bangs Rate this link
- Bug Zapper - The high-tech versions consist of a high voltage low current power supply and fluorescent (usually) lamp selected to attract undesirable flying creatures. (Boring low-tech devices may just use a fan to direct the insects to a tray of water from which they are too stupid to be able to excape!). This is just a line powered voltage quadrupler. R1 and R2 provide current limiting when the strike occurs. Rate this link
- Jacob's Ladder (Climbing Arc) Construction - A Jacob's Ladder is the type of high voltage display seen in many old (and usually bad) sci-fi movies. Here is info on a common type that is easy to construct with readily available parts. Rate this link
- Ignition coil driver - A very simple circuit that will provide high voltage (15-40kV) sparks using a common ignition coil. The input is 12VDC at around 5 to 6 amps. Rate this link
- Ignition Coil Driver - This circuit takes +12V up to 6A and drives a car ignition coil. Both frequency and drive pulse width are adjustable in this circuit. Rate this link
- Ignition Coil / Flyback Transformer Based high voltage generators - This page gives my thoughts on how to use a car ignition coil or flyback transformer as a high voltage generator. The objective is to produce as high a voltage as possible, with as high a power throughput as possible. Rate this link
- Jacob's Ladder - dangerous special effect seen in old horror movies Rate this link
- Range, oven, and furnace electronic ignition Schematic - Many modern gas stoves, ovens, furnaces, and other similar appliances use an electronic ignition rather than a continuously burning pilot flame to ignite the fuel. These are actually simple high voltage pulse generators. This circuit generates sparks from mains voltage. Input is 115 VAC, 4 mA, 50/60 Hz AC. The output is few kilovolt pulses with a repetition rate of about 2 Hz. Rate this link
- Simple High Voltage Generator - This is a very simple ignition coil driver circuit which can probably be built with stuff from your junk box. Circuit examples woerk from 230V AC and 120V AC. Rate this link
- Simple nitrogen spark generator - nitrogen or air sparks are very powerful light sources that produce flashes that last only a few nanoseconds, this 120V AC line powered circuit generates a continuous series of very small sparks across electrodes with a 0.05 inch gap, pdf file Rate this link
- Stun Gun Schematic Rate this link
- Make a Jacobs Ladder - Once you know what a Jacobs ladder is you will easily spot them being used on vintage black and white horror movies, where they were frequently used as part of the apparatus used to bring Frankenstein back to life. This article describes how a standard 10 to 15kV neon sign transformer is perfect for making small ladders. The ideal transformer has as high a voltage as you can get. Rate this link
- Greg's Garage Tesla Coil Site Rate this link
- 500,000 Volt Tesla Coil - 18" sparks Rate this link
- Cheap and Quick Tesla Coil - uses neon transformer and spark gap Rate this link
- Homepage of K.Ukkonen - lost of Tesla Coil links Rate this link
- JavaScript Tesla Coil Calculator Page Rate this link
- Jochen's High Voltage Page - This page has lots of information on high voltage components and experiments with them. Rate this link
- Nikola Tesla Page, tesla coils Rate this link
- Tesla Coil Calculations - coils and capacitors Rate this link
- Tesla Coil Mailing List Page - The tesla coil mailing list covers the topics of tesla coil construction, operation, measurement, and use. Topics range from sources of materials, opinions of commercial tesla coil kits, measurement of electical fields, photography of coils, construction techniques, etc. Rate this link
- Tesla coil pictures Rate this link
- Tesla Coil Safety Information - This document is provided to assist the amateur in understanding the significant dangers associated with tesla coils. Rate this link
- The Electrum Project - some technical information about a very large tesla coil project Rate this link
- TUBE-type Oscillator-Driven Tesla Coil Rate this link
- Steve's Tesla Coil Page - Tesla Coils by Scopeboy. Pioneering research into the field of Off Line Tesla Coils (OLTCs) including the largest OLTC built to date. Rate this link
- Capacitor Discharge Ignition Circuit (CDI) Rate this link
- Circuit to Get High Voltage from an Ignition Coil - This is a simple ignition coil driver circuit based on 555 timer IC and power MOSFET Rate this link
- Electronic high voltage meters - Common voltmeters, digital or analog, usually range to some hundred volts maximum. Higher voltages not only cannot be indicated, but will also destroy the instrument. However, the range of any voltmeter can easily be extended using extra series resistance. Rate this link
- High Voltage Experimenter's Handbook Rate this link
- Ignition Coil Flyback Transformer Based high voltage generators - Flyback transformer driver circuit with protection/advanced features Rate this link
- Jochen's High Voltage Page - lots of high voltage circuits and experiments Rate this link
- Measuring high voltages by spark length - The simplest way to get at least a rough value of tension is to measure the maximum distance the voltage can arc over. The maximum spark length is determined by applying the high voltage to a pair of electrodes and bringing the electrodes closer to each other until a spark jumps over. Rate this link
- Snock's High Voltage Page - detailed explanation on flyback, ignition coil circuits and pictures of various transformers Rate this link
- Van De Graaff Generators & High Voltage Stuff Rate this link
- Plasma Sphere construction articles, plans, links Rate this link
- The secret to vacuum-less plasma globes - A box or balloon full of pure helium or argon will give immensely long snakelike discharges! Rate this link
- HeNe laser power supply Rate this link
- Tiny tiny invertor design - run off of 3V, and charges up a little 1 uf 250V cap all the way up in about 30 seconds Rate this link
High voltage power supplies
This section deals with the power supplies which output mich higher voltagethat is safe to touch (voltages above 75V DC). NOTE: High voltage power supplies are very dangerous circuits which should only be built by persons who know exactly what they are doing and do it safely. High voltage power supply can easily kill you if you do mistakes with it.
Adjustable high voltage supplies
Low power
Safety notice: Even though very many low power high voltage circuit produce vely low currents which are not as such usually dangerous, they can still produce dangerous shocks.
High power
High voltage spark circuits
Tesla coils
Tesla coil is high voltage technology discovered by Nikola Tesla over 100 years ago. A Tesla coil is a high-voltage air-core resonant transformer. The Tesla coil achieves a great gain in voltage in a very different way than a conventional transformer. Tesla coil's voltage gain is based upon the different impedances of the primary and secondary circuit components. Tesla coils are extremely dangerous. The entire circuit of a Tesla coil contains deadly levels of voltage and current. A Tesla coil can radiate high voltage sparks many feet out into the air that will strike anything including you. Extreme caution must be exercised whenever operating a Tesla coil. Tesla coils can generate huge amounts of radio frequency interference (should preferably operated only inside a shielded room).Tesla coil operation involves high energy electrical discharge, high voltages, and often high speed rotary gaps. For the beginner, there are plenty of ways to injure or kill yourself. Safety is an important part of fun, successful tesla coiling.
High voltage experimenting
Experimenting with high voltages is usually extremely dangerous. Many high voltge circuit can contain deadly levels of voltage and current. High voltage circuits can radiate high voltage sparks out into the air that can strike anything including you. Extreme caution must be exercised whenever operating high voltage circuits. For the beginner, there are plenty of ways to injure or kill yourself. Safety is an important part of fun, successful experimenting with high voltages.
Special application power supplies
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