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High voltage source with 6 MOTs on 2 phases

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The purpose of this resource is nothing more meaningful than pulling large discharges :). Source: 6 MOTs (transformers from microwave ovens) connected to two triads. In each of the three MOTs are connected in parallel primaries and secondaries. These three are then connected on both sides in series and powered from 400V ~ interfacial tension. The current is suppressed by the primary side two milliamperes modified chokes for high pressure sodium lamps 150W TESLA. Editing reactors involves the removal of metal "U" and leaving only metal "T". After adjusting coils are about 35-36mH. The wire has a diameter of about 1mm. On the output side resonant capacitors are connected from microwave ovens, each has approximately 1uF 2100V on ~, there are a total of 16 pieces. The reason is again connected capacitors prosaic: they can be pulled more discharge than without them :). The sources were used MOTs 12 + 13 + 14 in one and three 5 + 10 + 11 from the second table MOTs . Source is not designed for continuous operation. Video was filmed at the end of the 2 - in the meantime it was necessary to let the reactor cool and MOTs. Output voltage is about 4000V ~. Source taken from the current approx 400V 40A and 16A circuit breaker in the class B crashes. When I tried to increase the number of capacitors from 18ks to 16 pieces, so I immediately fell breaker.

Attention! Output voltage transformers from microwave ovens is about 2100 Vac. This voltage is absolutely deadly! Capacitors can remain charged even after shutdown. Everything you do on your own risk. Author accepts no responsibility for any injury, life or property.

Diagram of HV supply MOTs with 6 and 16 supplied from capacitors 400V ~.

MOTs for source

3 MOTs in the carrier (first three)

All 6 MOTs in two containers

MOTs with capacitors. With 18 it threw the circuit breaker, so that eventually only worked with 16.

Modified choke for 150W sodium lamps from Tesla.

Once reactors - Deleted U plates remained in them only sheets T. This reduces the inductance.

Single fork.

Posted By Newton Shah2:08 PM

Jacob's ladder with 4 MOTs

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As a source of high voltage for this great Jacob ladder I used 4 MOTs (transformers from microwave ovens). They are connected in parallel primaries and secondaries in series with the "grounded" the center and supported networks. Two of MOTs (1 and 4) an odzemnit. Odzemnit not be any MOT. You must select a secondary with good insulation. The best type appears with a plastic frame (eg Moulinex). Original voltage is 2100V on the live end and cold end to 0V to earth. Odzemněné MOTs 1 and 4, we live at 4200V and 2100V at the end of the cold end. Some types of MOTs odzemnit not because of the lower outlet end is pinched between the secondary and the core (see photo below). Odzemnění is performed by the lower end is separated from ground and it is inserted under the insulation. The skeleton must not touch anything. Inlet to the cold end must somehow fix (eg glue), otherwise the jerk pulls pin :). A few people have asked me how to fix it - it is difficult matches :). Odzemnění may also be a problem for MOTs, where the secondary and the core is gap outlet at the edge of the insulation or leaky secondary bottom (open).
Because short-circuit current is large MOTs, fell the breaker or would soon overheated. It is therefore necessary to limit the current. To do this, I used three modified chokes TL. These are reactors for high pressure sodium lamps 150W TESLA. Since their initial inductance was too big, I removed them from the plates and kept only for plates of T. This will reduce the inductance of about 30mH (when the coil connect directly to 230V 50Hz 20A flows). The chokes limit the maximum power of the ladder network 30A (16A circuit breaker is a little over a minute at this current fall). Short-circuit current output is about 750m. Output voltage is about 8kV.
I used these as the two iron rods, which are at the narrowest point distant 4 mm, in the broadest 12cm. A useful part of the rods (the one that climbs after discharge) is 75 cm long. Thin copper wires have not worked since they tend to bend under their own weight and easy to translate.
Attention! The device is powered by a powerful source of high voltage! Contact with this voltage is lethal. Tensions can bridge the considerable distance or insulation break. Shocks produce toxic nitrogen oxides and ozone. Everything at your own risk and potential for injury, death or property do not take responsibility.

Diagram of the high voltage source with 4 MOTs for Jacob ladder.

Installation on board 4 MOTs

After installation (on the right is seen with a plastic skeleton MOT).

MOTs and inductors


Jacob's ladder in operation - long shutter

Once more

Example of MOTU, which can not odzemnit. It can only be used as 2 or 3 MOT

The lower part of Jacob's ladder leads

Posted By Newton Shah2:06 PM

Multi-mini transformer

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Recently I came across a greater number of miniature embedded with atypical parameters transformers 500V / 22.5 V 0.1 A It occurred to me to use them as a source of high voltage. I used 16 pieces and put them on "Multi-mini transformer." 22.5 The original secondary as I took the primaries. I contacted the 8 and 8, in order to be connected to the network. Original 500V primaries are used as secondary. They are all connected in series with a grounded center. A voltage 8kV with a grounded center, a 4-0, 4kV, similar to the NST. News from the network load is 160 mA, 840 mA in the circuit. Short circuit current is 22 mA output. 22.5 The winding DC resistance to 35R, 500V windings have a resistance of 10k. Current limitation is mainly resistive (more than 90%), so the short-circuit transformers heat up and probably would not work permanently in the circuit. The 500V windings, these transformers have a detour, but I did not use to nothing. Similarly, it was also more common connecting transformers for 230V. Dielectric strength of used transformers is relatively high because they are hermetically encapsulated coil and the skeletal safety, which is winding side by side, separated by a partition. The use of transformers or transformers nezalitých without barriers would be impossible because it would probably have been the primary secondary breakdown. Transformer is in this connection are the primary and secondary high voltage 4kV ~. The source can perform various experiments, such as in the pictures below.
Attention! The output is mortally dangerous high voltage. This voltage can overcome great distances or break isolation. Everything you do on your own risk. Author accepts no responsibility for any injury, life or property.

Diagram of multi-mini transformer

potted transformers 500V / 22.5 V 0.1 A


Finished multi-mini transformer

8kV discharge, 22 mA.

Source illuminates everything in the series (xenon lamp, sodium, metal halide and mercury lamp, fluorescent lamps, neon lamps, LED)

Plazmakoule of 200W bulbs braided wire.

One output is connected to the socket, the other braid.

Plazmakoule in a can with water.

Plazmakoule with a damp surface (serving as the second electrode).

Once more.

Posted By Newton Shah2:03 PM

AC discharge with 9 MOTs

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This is another design that has no practical use any (or no thought of me yet), but still looks very impressive :). It is a three-phase discharge - discharge that burns between three electrodes energized from the high voltage three-phase. The electrodes are arranged in a horizontal equilateral triangle. Page delta during experiments was about 5-15 cm. Shock and reached the height of 80cm. The electrode plates I later put the salt, which turned the discharges into the orange.
As a source of high voltage three-phase 9 was used MOTs (transformers from microwave ovens), 3 in parallel in each stage. The bottom end was a secondary increase in tension associated with the phase. The current was limited to the secondary side resonant capacitors - 5 pieces on each phase of the microwave capacitors, or about the 5uF ~ 2100V (test voltage of these capacitors is reportedly ~ 7100V and 9000V =). Resource consumption is around 30A per phase. 16A circuit breaker when the current falls after about 20 seconds. To avoid crashing breakers when switching sources, connected to each phase of the first through about 35mH choke, and then only directly. Instead reactors would be used as resistance.

Attention! The output voltage of a transformer from a microwave oven is about 50Hz ~ 2100V and current in the range of amperes. The bonding can be achieved even higher voltages and currents. Output high voltage is lethal and can overcome great distances. The electric shock can therefore occur without contact with conductive parts. Capacitors can remain charged even after shutdown. When working with this equipment there is fire. Shocks produce poisonous gases. Everything you do on your own risk. Author accepts no responsibility for any damage to your health, life, property or otherwise.

Diagram of three-phase HV supply MOTs with 9 and 15 for the creation of capacitors discharge

Three-phase discharge from the source

Other discharges 3F

Shocks with salt (NaCl) on the electrodes.

Source with 9 MOTs


Electrodes with salt

Posted By Newton Shah2:02 PM


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VOX is a switch ordered by voice, often used at microphones instead of the classic switch button. The vox described here may be connected to almost any type of audio equipment which has an external speaker for coupling.

The threshold action is set with volume potentiometer of the audio amplifier which commands the VOX . The signal (on speakerphone) from the terminals of R2 is connected capacitive on T1 base. Resistance R3 limits base current of the transistor, in cases in which voltage input exceeds 600mV. Diode D1 hangs positive trip of the input signal, so Veb can not become less than 0.6V.
Relay form the output circuit is ordered by Darlingtonul T2. Resistance R4 maintains the relay unoperated as long as T1 is blocked. The bipolar capacitor C2 allows to work as filter together with T2. Resistance R5 is limiting the T2 current base at a security level.
The threshold of switching VOX’s is about 600mV (R2). Maximum input voltage is determined by maximum admissible dissipation on R2 and R3. As a rule entry tension should not exceed 40Vvv. VOX consumed current is primarily formed by the sum of relay coil currents and R5. At VOX’s overloading, the resistance may lead up to 100mA.

VOX circuit diagram


Posted By Newton Shah12:03 PM