• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Get free circuit help 24/7

New Projects | Privacy Policy | About us | Contact | Disclaimer | Copyright | Videos 

You are here: Home / Fun Projects / Make this Plasma Ball Circuit

Make this Plasma Ball Circuit

Last Updated on May 22, 2021 by Swagatam 42 Comments

In this post we learn how to build a simple plasma globe or a plasma ball circuit using very oridinary parts such as an automotive ignition coil, a triac, diac, and a few other passive elements.

A plasma ball is a decorative display device in which a very high voltage in the order of many kilovolts is passed inside a glass ball, which results in the generation of a fascinating high voltage ionized plasma light display inside the glass ball

caution electricity can be dangerous

In our plasma ball circuit, an ordinary 100 watt bulb is used for the display unit. The glass lamp used in this design is customized by gluing a small sheet of aluminum foil directly to the back half of the glass, to make a kind of high voltage capacitor.

The filament inside the lamp bulb works like one particular plate of the capacitor, the glass of the bulb acts like the dielectric, and the aluminum foil serves like the second plate.

The aluminum foil, which acts like the negative plate of a polarized electrolytic capacitor, needs to be grounded by connecting the aluminum foil with the negative line. A high voltage is discharged inside the bulb by means of its inner filament electrode, ionizing the thin gas that stays within the glass envelope, producing a spectacular visual effect identical to an electrical lightening and storm.

Circuit Description.

The plasma ball or plasma Bulb circuit makes use of a triac diac combination, in which the diac acts like a trigger element and controls the current to the triac.

The main part of the circuit is an automotive ignition coil, T1, wired to supply a high-voltage charge of considerable power to ionize the gases present inside the glass of any ordinary incandescent lamp.

The entire circuit is powered directly the mains AC input.

The mains AC is supplied to the triac/diac stage via a phase-shift circuitry (which includes capacitor C1 and resistor R1) so that the triac is able to fire through the diac.

The moment TR1 fires or conducts, a small burst of electricity is driven through C2 to the primary side winding of T1. (Remember that as soon as AC mains input is first applied to the capacitor C2, it behaves like a short, after which the capacitor starts to charge towards the applied voltage level.)

This burst of electricity induces a strong rush of magnetic field inside the T1 primary winding, triggering an equivalent amount of stepped-up high voltage across its secondary winding of the ignition coil.

Next, as soon as the capacitor C2 starts to charge to its maximum peak level, the AC voltage to the diac begins to drop quickly. As the voltage drops downwards, the current necessary to keep triac switched ON sinks below the holding level, the triac now gets switched off.

After this positive cycle, the next half of the AC signal which is negative commences.

As the AC voltage cycle starts getting more negative, a potential begins appearing to the triac's trigger input via the diac, triggering it to fire. Since triacs are designed to conduct for both the AC half cycles, the triac fires during both the voltage cycles of the AC.

Now as TR1 conducts in the reverse direction, the C2 charge begins draining off, via TR1, which causes the next burst of electricity with opposite voltage to get induced in the primary winding of T1, causing the equivalent amount of stepped up voltage to be transferred in its secondary winding.

During these conductions of the triac, high-voltage output of more than 2 kv is generated at the secondary of T1 which is applied to the lamp, filament, creating a plasma ball display to be generated inside the lamp.

The C2 value should be selected such that it is not beyond 2-2.5 µF to protect against damage to the ignition coil T1.

Alternatively, if the C2 value is selected very small, the plasma ball sparking inside the bulb might fail to glow with satisfactory effect and brightness.

Inductors LI and L2 have been included in order to block the ignition coil switching transients and spikes from returning back to the home AC wiring or the AC line.

Plasma Ball Cabinet

The enclosure for the above explained plasma ball circuit can be fabricated in the following manner, using wooden box, or plastic box and tubes.

Do not use metal box or tube for the cabinet, since the whole set involves high voltages and mains AC input which can lead to electricity shocks or other electricity related accidents.

The aluminum foil behind the glass bulb is not shown in the above image, so make sure to stick an aluminum foil behind the bulb glass externally and connect it wire it with the circuit appropriately as per the indicated diagram layout.

Once the above set up is built and tested, do not forget to cover the lamp structure with another plastic tube, so that the glass can e protected from accidental knocks and damages, as shown below:

Ignition Coil

The ignition coil can be any automotive ignition coil, preferably the one that are used in motorcycles. The following image shows an example motorbike ignition coil which could be used for the above explained plasma ball circuit:

Another simple plasma ball circuit can be seen in the following article:

https://www.homemade-circuits.com/wp-content/uploads/2021/05/plasma-ball-circuit.pdf

WARNING: THIS PROJECT INVOLVES EXTREMELY HIGH LETHAL VOLTAGES. USERS ARE ADVISED TO MAINTAIN EXTREME CAUTION AND TAKE APPROPRIATE PROTECTION MEASURES WHILE BUILDING AND TESTING THIS CIRCUIT.

You'll also like:

  • 1.  2 Simple Fastest Finger First Circuits Explained
  • 2.  Whistle Activated Switch Circuit
  • 3.  Circuit Projects for Beginners and School Students
  • 4.  Electronic Cricket Sound Generator Circuit
  • 5.  Random LED Number Generator for Gambling Application
  • 6.  Sound Triggered Halloween Eyes Project – “Don’t Wake the Devil”

About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

Have Questions? Please Comment below to Solve your Queries! Comments must be Related to the above Topic!!

Subscribe
Notify of
42 Comments
Newest
Oldest
Inline Feedbacks
View all comments


Primary Sidebar

Categories

  • 3-Phase Power (15)
  • 324 IC Circuits (19)
  • 4017 IC Circuits (52)
  • 4060 IC Circuits (26)
  • 555 IC Circuits (99)
  • 741 IC Circuits (20)
  • Arduino Engineering Projects (83)
  • Audio and Amplifier Projects (118)
  • Battery Chargers (83)
  • Car and Motorcycle (96)
  • Datasheets (77)
  • Decorative Lighting (Diwali, Christmas) (33)
  • Electronic Components (101)
  • Electronic Devices and Circuit Theory (36)
  • Electronics Tutorial (120)
  • Fish Aquarium (5)
  • Free Energy (34)
  • Fun Projects (14)
  • GSM Projects (9)
  • Health Related (20)
  • Heater Controllers (30)
  • Home Electrical Circuits (106)
  • How to Articles (20)
  • Incubator Related (6)
  • Industrial Electronics (28)
  • Infrared (IR) (40)
  • Inverter Circuits (98)
  • Laser Projects (12)
  • LED and Light Effect (95)
  • LM317/LM338 (21)
  • LM3915 IC (25)
  • Meters and Testers (67)
  • Mini Projects (152)
  • Motor Controller (67)
  • MPPT (7)
  • Oscillator Circuits (25)
  • PIR (Passive Infrared) (8)
  • Power Electronics (35)
  • Power Supply Circuits (81)
  • Radio Circuits (10)
  • Remote Control (48)
  • Security and Alarm (64)
  • Sensors and Detectors (127)
  • SG3525 IC (5)
  • Simple Circuits (75)
  • SMPS (29)
  • Solar Controllers (62)
  • Timer and Delay Relay (54)
  • TL494 IC (5)
  • Transformerless Power Supply (8)
  • Transmitter Circuits (41)
  • Ultrasonic Projects (16)
  • Water Level Controller (45)

Calculators

  • AWG to Millimeter Converter
  • Battery Back up Time Calculator
  • Capacitance Reactance Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • Inductance Calculator
  • LC Resonance Calculator
  • LM317, LM338, LM396 Calculator
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • Reactance Calculator
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • Transistor Astable Calculator
  • Transistor base Resistor Calculator
  • Voltage Divider Calculator
  • Wire Current Calculator
  • Zener Diode Calculator

© 2023 · Swagatam Innovations

wpDiscuz