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180kV Marx Generator- Quickly generate HV with a minimum of components.__
1-kV power supply produces a continuous arc- 02/05/04 EDN Design Ideas: Designing a high-voltage switching power supply that can produce a sustained arc can be challenging. This compact and efficient design delivers 1 kV at 20W and can withstand a continuous arcing, or short-circuit, condition (Figure 1 Design by Robert Sheehan, Linear Technology App Note, Milpitas, CA
2.10 KV High Voltage Generator with 2N3700- The simple circuit described here is capable of generating up to 2.1 kilovolts or more from a current source with low voltage flyback (LOPT) transformer to recover from a B / W or color TV or computer monitor. Typical output with a 12 VDC 2 A power__
20kV Digital High Voltage Meter- Many of the projects on this site deal with high voltages ranging from a few to several kilovolts. Unfortunately, traditional multimeters can measure voltages up to only about 1, 000 volts leaving many of us to crudely estimate voltages by spark gap distances. This project utilizes a simple voltage divider network enabling the measurement of several kilovolts on a stand-alone digital voltmeter. __ Designed by Greg Miller
25-kV generator tests insulation- 06/05/98 EDN Design Ideas: (Scroll to find this circuit) To generate high voltages with proper insulation between the "hot node" and the rest of the circuitry, a car ignition coil can function in place of a high-voltage transformer. These coils have voltage ratings of approximately 20 kV, so you can use them to produce voltages Design by Lukasz Sliwczynski and Przemyslaw Krehlik, University of Mining and Metallurgy, Krakow, Poland
2uS Light Pulse Receiver- Although the LF357 is an obsolete part, this circuit gives you an idea how to build a sensitive modulated light detector with high ambient light immunity. The first section uses a 100mH inductor as an efficient photodiode current to voltage conversion circuit. . . Circuit by David Johnson P.E.-June, 2002
4.096MHz Class E SSTC- High frequency class E SSTC, which also plays music!__
4k Volt 5k Volt 2000VAC Power Supply- These transformers are 120VAC input with 2kVAC output. Just wire the cores together (the cores are normally one of the HV terminals) and wire the primaries so they oppose eachother. If you don't get a nice arc from this switch the input leads on one transformer. This will not arc over that far, but if you start a small arc you can pull it out to about 5". These transformers will make an excellent supply for a Jacob's ladder__
A Dirt-Cheap, High Current Power Supply- Here's yet another use for that pensioned-off AT computer that's gathering dust in the corner.__ SiliconChip
A Momentary High Voltage Arc- Can be used to Ignite a barbeque or a Gas in a Potato Gun. __ Designed by G.L. Chemelec
A Single Amplifier Precision High Voltage Instrument Amp- DN25 Design Notes__ Linear Technology/Analog Devices
A spark throwing tesla coil made entirely of garbage- So you still don't believe that people throw away tons of good stuff you can use to have some fun. To prove it to you, I've decided to make a Tesla Coil from only stuff I've found in the garbage. I will include a detailed list of all components used and where/what they came from. __ Designed by Greg Miller
A svelte beast cuts high voltage down to size- 11/24/99 EDN Technical Article: Piezoceramic transformers have many features, including small form factor, that make them inherently well-suited to CCFL-backlight inverters. Design by Jim Williams and J Phillips and G Vaughn, im Williams, EDN's most revered contributor-At 63 years of age, Williams passed away in June 2011 after a stroke.
An Electric Fence project- A Very Efficient and Simple CMOS
Design __ Designed by G.L. Chemelec
An electromagnetic linear accelerator; Coil gun- The concept is pretty easy to understand unless your name is Kurtz or Matt. An electric current is passed through a hollow coil of wire inducing a magnetic field in the vicinity of the coil. Anything "magnetic" that is near the coil experiences an attractive force towards the center of the coil. If the current through the coil can be switched on and switched off at just the right time, the magnetic object __ Designed by Greg Miller
Another Electric Fence project Fencer-2- Considerably MORE POWERFUL, If Needed!. This is the Third Most Popular Project on my site. __ Designed by G.L. Chemelec
APD-bias has adjustable output- 05/22/97 EDN Design Ideas: The avalanche-photodiode detector (APD], like the PIN diode, serves as a receiver in optical communications systems. The APD is more sensitive, but you must properly bias it to produce the appropriate electron flow for a given flux of photons. An external D/A converter allows dynamic,. Design by Larry Suppan, Maxim Integrated Products, Sunnyvale, CA
ATX Bench Supply- Convert a standard computer ATX PSU into a bench supply.__
ATX Power Switch Substitute- An additional push-button switch is normally required for the ATX Power Switch/Soft Power Switch signal, but you can do without it if you use this simple circuit. It is an artful design, but it has been repeatedly tested. The zener diode is intended to provide protection against excessive voltages and reverse-polarity connection. In the latter__
Audio Modulated SSTC- A Tesla Coil designed specifically for playing music.__
Build a 10 Amp 13.8 Volt Power Supply- Sometimes amateurs like to home-brew their power supplies instead of purchasing one off the shelf at any of the major ham radio retail dealers. The advantage to rolling your own power supply is that it teaches us how they work and makes it easier to troubleshoot and repair other power supply units in the shack. It should be noted that there is no real cost advantage to building your own power supply unless you can get a large power transformer and heat sink for a super low price. Of course rolling our own gives us the ability to customize the circuit and make it even more reliable than commercial units. __ Designed by N1HFX
Build a Jacob's Ladder- High voltage displays have always been awe-inspiring. They not only look and sound spectacular - they even have a pungent smell, caused by the ozone which is generated by any high voltage discharge. One of the most fACSInating high voltage displays is the Jacob's Ladder, in which a series of sparks continually climb between two vertical wires.__ SiliconChip
Build the Lightning Bulb- The Lightning Bulb circuit uses a quadrac (see Fig.1) --a device that combines a TRIAC and a diac trigger in a single package--to control the supplied current. Figure 1A shows the schematic symbol for the quadrac, while figure 1B shows the pinout for the unit used in our circuit. Note that quadracs are increasingly difficult to come by;. __ Designed by Vincent Vollono
Build this Negative Ion Detector- Figure 1 shows a schematic diagram of the Ion Detector--a rather simple circuit consisting of three transistors (two PN2907 PNP, and a single PN2222 NPN type) , three resistors, one capacitor, an antenna, a mA meter, and an LED __ Designed by Vincent Vollono
Build your own High-Voltage Capacitors- As one who supplies parts to those who experiment with high voltage, I get a lot of letters and phone calls from frustrated builders that go like: "Can you supply an inexpensive xxx microfarad capacitor at a working voltage of YYY? My only source wants $249 for one. "Sometimes, a high price is justified; other times, a seller has the only capacitors of a special value available, and will soak you for the maximum dollar __ Designed by Tony van Roon VA3AVR
Cheap but Sensitive Radiation Detector- This project started out as a gag project, a "Nuclear War Detector". The idea was to make a device that would flash a little red light if a nuclear attack were underway or if there were some sort of massive radiation spill right outside the house. It would be like a rain detector built into an umbrella, perfectly functional but totally useless __ Contact: Charles Wenzel of Wenzel Associates, Inc.
Circuit Delivers high voltage swing from lower supplies- 12-Dec-02 EDN Design Ideas: The need for higher voltage swings in applications such as test-and-measurement instruments is constantly increasing, but the power supplies impose limitations on the operational amplifier rails make the high-voltage need a challenge for designers. How do you deliver high-voltage swings to a load without increasing the voltage levels of the power supplies of the operational amplifier? In other Design by Bruce Carter and Ron Shakery, Texas Instruments, Dallas, TX
Circuit Project: 12kv High Voltage Generator- The hobby circuit below uses an unusual method to generate about 12,000 volts with about 5uA of current. Two SCRs form two pulse generator circuits. The two SCRs discharge a 0.047uF a 400v capacitor through a xenon lamp trigger coil at 120 times a second. The high voltage pulses produced at the secondary of the__
Circuits Sort Out the Highest Voltage- 11/09/06 EDN Design Ideas: Greatest-of-three voltage detector drives indicators and external display Design by Ezio Rizzo, Nova SNC, Genoa, Italy, and Vincenzo Pronzato, Felmi SRL, Genoa, Italy
CMOS
based electric fence Design- A Very Efficient and Simple CMOS
Design __ Designed by G.L. Chemelec
Cockcroft Walton Diode Voltage Multipliers- These circuits generate high voltages and can cause dangerous shocks! Do not build these devices unless you are experienced and qualified to work on high voltage devices. __ Contact: Charles Wenzel of Wenzel Associates, Inc.
Components for Ion Chambers- Radiation Circuits - components used in making an ion chamber __ Contact: Charles Wenzel of Wenzel Associates, Inc.
Current-sense Amplifier handles high voltages- 11/06/97 EDN Design Ideas: High-side current-sense amplifiers, such as IC1 in Figure 1, monitor current from a battery or dc power line in systems for which the ground-return continuity is crucial. IC1's 36V maximum operating voltage, however, excludes some applications, including traction-motor batteries and central-exchange power supplies, both of which require operation at voltages exceeding 72V. The external circuitry in Figure 1 allows IC1 to monitor current at voltages of 300V and greater. Q1 and Q2 form a current source whose compliance voltage provide as the high-voltage capability. IC1 draws its 100-µA supply current from a simple floating power supply comprising C1, C2, avalanche diode D1, and the Q1-Q2 current source. Design by Andy Fewster, Maxim Integrated Products, Reading, UK
Deliver High Voltage Swing from Lower Supplies- 12/12/02 EDN Design Ideas: The need for higher voltage swings in applications such as test-and-measurement instruments is constantly increasing, but the power supplies impose limitations on the operational amplifier rails make the high-voltage need a challenge for designers. How do you deliver high-voltage swings to a load without increasing the voltage levels of the power supplies of the operational amplifier? In other Design by Bruce Carter and Ron Shakery, Texas Instruments, Dallas, TX
Dirt-Cheap, High Current Power Supply- Here's yet another use for that pensioned-off AT computer that's gathering dust in the corner.__ SiliconChip
Dual Resonant Solid State Tesla Coil- Create spark gap style streamers with solid state components.__
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