1. 1
509 ARMY BASE WORKSHOP
INDUSTRIAL TRAINING PROJECT
PROJECT NAME
Electric Stun Gun
Submitted to: Submitted by:
Commandant & MD Manu Khandelwal
509 Army Base Workshop, Rohit Kumar
Agra Kalpagya Goyal
Devkaran
Piyush Kumar
Project done at 509 Army base workshop, Agra
{ISO 9001:2008 Certified}

2. 2
ACKNOWLEDGEMENT
We must first of all, express our heartliest gratitude to ARMY BASE WORKSHOP 509 for
providing us such a platform for implementing the ideas in our mind and also a special great
full thanks to Col. M.C. KUTHARI (OIC GEGP).
We would also like to thank Mr. O.P GAUTAM (TCM) who supported us to complete the
project, and gave us all the guidance to complete this project.
We would also like to thank GE Group for supporting us and providing us the platform to
complete this subject. We feel profound pleasure in bringing out this project report for which
we have to go from pillar to post to make it reality. Today when our endeavour has reached,
we look back in mute gratitude to one and all without whose help, this reality would have
remained a dream.
1. Manu Khandelwal
2. Rohit Kumar
3. Piyush Kumar
4. Devkaran
5. Kalpagya Goyal

3. 3
ABSTRACT
Electric stun guns have been developed as less-lethal devices that law enforcement officers
can use to control potentially violent subjects, as an alternative to using firearms. These
devices apply high voltage, low amperage and pulsatile electric shocks to the subject, which
causes involuntary skeletal muscle contraction and renders the subject unable to further resist.
In field use of these devices, the electric shock is often applied to the thorax, which raises the
issue of cardiac safety of these devices. An important determinant of the cardiac safety of
these devices is their electrical output. Here the outputs of three commercially available
electric stun guns were evaluated with a resistive load and in a human-sized animal model.

4. 4
TABLE OF CONTENTS
S. No Contents Page No.
1 Acknowledgement 2
2 Abstract 3
3 Table of Contents 4
4 List of Figures 5
5 Introduction 6
6 History of Stun Gun 7
7 Circuit Diagram of Stun Gun 7
8 Principle of Operation 8
9 Description of Material Used in Stun
Gun
10
10
11
Timer and Circuit Details
Modes of Operation of 555 Timer
17
20
12 Types/Varieties of Stun Gun 23
13
14
15
16
17
Stun Gun Design and Operation
Testing and Caution During Operation
Advantages & Disadvantages
Applications
References
25
27
29
30
31

5. 5
Lists of Figures
S. No. Figure Page No.
1 Circuit Diagram of Stun Gun 7
2 Resistor 11
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Simple Transformer Assembly
Symbol of Polar Capacitor
Electrolytic Capacitor
Symbol of Non-Polar Capacitor
Shape of Diode
555 Timer Pins
MOSFET
Terminals of MOSFET
555 Timer
Pin Details of 555 Timer
5555 Timer Pin Connections
Standard 555 A-Stable Circuit
A Concealable Weapon Shaped and Sized like a
lipstick tube
Electric Cattle Prod from the 1950’s
Circuit Diagram of Stun Gun
12
13
13
14
14
15
16
16
17
18
19
21
23
24
25

6. 6
INTRODUCTION
The electric stun gun is a modern, portable, personal-protection appliance. It generates
high potential energy to ward off vicious animals or other attackers. It is an aid to help
escape from a potentially dangerous situation. The device develops about 200,000 volts.
Higher voltages attained by adding additional multiplier stages, but it should be noted that
those stage will also increase the overall size of the unit. The stun is very compact, being
built into a small plastic case. It is powered by a single 9-volt battery, either NiCad or
alkaline. The high voltage is applied to two electrodes which require only light contact to
be effective. When touched with the tazer, the victim will receive a stunning, but non-
lethal jolt of electricity that will usually discourage any further encounters. The electric
stun gun tazer is a power supply which consists of a micro-size regenerative
amplifier/oscillator coupled to an energy multiplier section. It should not be confused
with a cheap induction-type cattle prods. The tazer is more versatile than other high-
voltage stun devices currently being sold. Those devices are basically high-voltage, AC
generators which jam the nervous system. However, the tazer may be used for heating
and burning applications, or anywhere a high voltage DC supply is required.
An electric shock weapon is an incapacitant weapon used for incapacitating a person by
administering electric shock aimed at disrupting superficial muscle functions and/or
causing pain without significantly hurting the subject.
Multiple types of these devices exist differing by the mode of use. Stun guns, batons (or
prods), and belts administer an electric shock by direct contact, whereas Tasers
(conducted electrical weapons, CEW) fire projectiles that administer the shock through
thin flexible wires. Long-range electroshock projectiles, which can be fired from ordinary
shotguns and do not need the wires, have been developed as well.

7. 7
History of Stun Gun
Jack Cover, a NASA researcher, began developing the Taser in 1969. By 1974, Cover had
completed the device, which he named after his childhood hero Tom Swift ("Thomas A.
Swift's electric rifle").The Taser Public Defender used gunpowder as its propellant, which led
the Bureau of Alcohol, Tobacco and Firearms to classify it as a firearm in 1976. John Cover's
patent was adapted by Nova Technologies in 1983 for the Nova XR-5000, their first non-
projectile hand-held style stun gun. The XR-5000 design was widely copied as the source for
the compact handheld stun gun used today.
Circuit Diagram of Stun Gun
Fig.1 Circuit Diagram of Stun Gun

8. 8
Principle of Operation
Electroshock weapon technology uses a temporary high-voltage, low-current electrical
discharge to override the body's muscle-triggering mechanisms. The recipient is immobilized
via two metal probes connected via wires to the electroshock device. The recipient feels pain,
and can be momentarily paralyzed while an electric current is being applied. It is reported
that applying electroshock devices to more sensitive parts of the body is even more painful.
The maximum effective areas for stun gun usage are upper shoulder, below the rib cage, and
the upper hip. High voltages are used, but because most devices use a non-lethal current,
death does not usually occur. The resulting "shock" is caused by muscles twitching
uncontrollably, appearing as muscle spasms.
The internal circuits of most electroshock weapons are fairly simple, based on either an
oscillator, resonant circuit (a power inverter), and step-up transformer or a diodecapacitor
voltage multiplier to achieve an alternating high-voltage discharge or a continuous direct-
current discharge. It may be powered by one or more batteries depending on manufacturer
and model. Output voltage is claimed to be in the range of 100 V up to 6 KV; current
intensity output is claimed to be in the range of 100 to 500 mA; individual impulse duration
is claimed to be in the range of 10 to 100 µs (microseconds); frequency of impulse is claimed
to be in the range of 2 to 40 Hz; electrical charge delivered is claimed to be in the range of 15
to 500 µC (micro-Coulomb); energy delivered is claimed to be in the range of 0.9 to 10J. The
output current upon contact with the target will depend on various factors such as target's
resistance, skin type, moisture, bodily salinity, clothing, the electroshock weapon's internal
circuitry, discharge waveform, and battery conditions.
Manufacturer’s instructions and manuals shipped with the products state that a half-second
shock duration will cause intense pain and muscle contractions, startling most people greatly.
Two to three seconds will often cause the recipient to become dazed and drop to the ground,
and over three seconds will usually completely disorient and drop the recipient for at least
several seconds. taser International warns law enforcement agencies that "prolonged or
continuous exposure(s) to the taser device’s electrical charge" may lead to medical risks such
as cumulative exhaustion and breathing impairment.

9. 9
Because there was no automatic stop on older model Taser guns, many officers have used it
repeatedly or for a prolonged period of time, thus potentially contributing to suspects’ injuries
or death. The current X26 model automatically stops five seconds after the trigger is
depressed and then the trigger must be depressed again to send another "shock". The trigger
can be held down continuously for a longer shock or the device can be switched off before
the full five seconds have elapsed.

10. 10
Description of Material Used in Stun Gun
Material Used in Stun Gun
1. 555 timer
2. 8pin chip socket
3. A 9:1000 ferrite core audio transformer
4. 10uF capacitor
5. 0.1uF capacitor
6. 10 x BA159 diodes ( they are faster than the 1N4007, meaning better performance)
7. 10x 3nF, 1200V ceramic capacitors.
8. Neon lamp
9. IRF 530 MOSFET
10. 680Ohm resistor
11. 2kOhm potentiometer (for more accuracy)
12. IR LED
13. 2x 9V batteries
14. Micro switch
15. Printed Circuit Board
16. Connecting wires

11. 11
Description of Material Used
Resistor:
The flow of charge (or current) through any material, encounters an opposing force similar in
many respect to mechanical friction. This opposing force is called resistance of the material.
It is measured in ohms. In some electric circuits resistance is deliberately introduced in the
form of the resistor.
Resistors are of following types:
1. Wire wound resistors.
2. Carbon resistors.
3. Metal film resistors.
Fig.2 Resistor
Transformer
Transformer works on the principle of mutual inductance. We know that if two coils or
windings are placed on the core of iron, and if we pass alternating current in one winding,
back emf or induced voltage is produced in the second winding. We know that alternating
current always changes with the time. So if we apply AC voltage across one winding, a

12. 12
voltage will be induced in the other winding. Transformer works on this same principle. It
is made of two windings wound around the same core of iron. The winding to which AC
voltage is applied is called primary winding. The other winding is called as secondary
winding.
Transformers are of two types Step Up transformer and Step Down transformer.
Fig.3 Simple Transformer Assembly

13. 13
Capacitors
A capacitor can store charge, and its capacity to store charge is called capacitance. Capacitors
consist of two conducting plates, separated by an insulating material (known as dielectric).
The two plates are joined with two leads. The dielectric could be air, mica, paper, ceramic,
polyester, polystyrene, etc. This dielectric gives name to the capacitor. Like paper capacitor,
mica capacitor etc.
Capacitors are of two Types Fixed and variable capacitor. Fixed types of capacitor are
further of two types:-
1. Polar Capacitor
2. Non Polar Capacitor
Fig.4 Symbol of Polar Capacitor
Fig.5 Electrolytic Capacitor

14. 14
Fig.6 Symbol of Non-Polar Capacitor
Diode
Diodes are semiconductor devices which might be described as passing current in one
direction only. Diodes have two terminals, an anode and a cathode. The cathode is
always identified by a dot, ring or some other mark. Diode is a unidirectional device. In
this current flows only one direction.
Fig.7 Shape of Diode
Diodes can be used as voltage regulators, tuning devices in RF tuned circuits, frequency
multiplying devices in RF circuits, mixing devices in RF circuits, switching applications or
can be used to make logic decisions in digital circuits. There are also diodes which emit
"light", of course these are known as light-emitting-diodes or LED's.
a rectifying diode of the 1N4001-07 ( 1A) type or even one of the high power, high
current stud mounting types. You will notice the straight bar end has the letter "k", this
denotes the "cathode" while the "a" denotes anode. Current can only flow from anode to
cathode and not in the reverse direction, hence the "arrow" appearance. This is one very
important property of diodes.
The principal early application of diodes was in rectifying 50 / 60 Hz AC mains to raw
DC which was later smoothed by choke transformers and / or capacitors. This procedure

15. 15
is still carried out today and a number of rectifying schemes for diodes have evolved
half wave, full wave and bridge, full wave and bridge rectifiers.
555 Timer
The 555 timer IC is an integrated circuit (chip) used in a variety of timer, pulse
generation, and oscillator applications. The 555 can be used to provide time delays, as
an oscillator, and as a flip-flop element. Derivatives provide up to four timing circuits in
one package. It is an 8pin silicon chip. In a-stable mode this is used to produce low
frequency oscillations.
Fig.8 555 Timer Pins
MOSFET
The metal–oxide–semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS
FET) is a type of transistor used for amplifying or switching electronic signals. In the
stun gun project MOSFET IRF530 is used for the low frequency operation.

16. 16
Fig.9 MOSFET
Although the MOSFET is a four-terminal device with source (S), gate (G), drain (D), and
body (B) terminals, the body (or substrate) of the MOSFET is often connected to the source
terminal, making it a three-terminal device like other field-effect transistors. Because these
two terminals are normally connected to each other (short-circuited) internally, only three
terminals appear in electrical diagrams. The MOSFET is by far the most common transistor
in both digital and analog circuits, though the bipolar junction transistor was at one time
much more common.
Fig.10 Terminals of MOSFET
The main advantage of a MOSFET transistor over a regular transistor is that it requires
very little current to turn on (less than 1mA), while delivering a much higher current to
a load (10 to 50A or more). However, the MOSFET requires a higher gate voltage (3-
4V) to turn on.

17. 17
Timer and Circuit Details
The 555 timer IC is an integrated circuit (chip) used in a variety of timer, pulse
generation, and oscillator applications. The 555 can be used to provide time delays, as
an oscillator, and as a flip-flop element. Derivatives provide up to four timing circuits in
one package. It is an 8pin silicon chip. In a-stable mode this is used to produce low
frequency oscillations.
Fig.11 555 Timer
Introduced in 1971 by American company Signe-tics, the 555 is still in widespread use
due to its ease of use, low price, and stability. It is now made by many companies in the
original bipolar and also in low-power CMOS types. As of 2003, it was estimated that 1
billion units are manufactured every year.
Depending on the manufacturer, the standard 555 package includes 25 transistors, 2
diodes and 15 resistors on a silicon chip installed in an 8-pin mini dual-in-line package
(DIP-8).

18. 18
Fig.12 Pin Details of 555 Timer
The NE555 parts were commercial temperature range, 0 °C to +70 °C, and the SE555
part number designated the military temperature range, −55 °C to +125 °C. These were
available in both high-reliability metal can (T package) and inexpensive epoxy plastic
(V package) packages. Thus the full part numbers were NE555V, NE555T, SE555V,
and SE555T. It has been hypothesized that the 555 got its name from the three 5 KΩ
resistors used within, but Hans Camenzind has stated that the number was arbitrary.
Low-power versions of the 555 are also available, such as the 7555 and CMOS
TLC555.The 7555 is designed to cause less supply noise than the classic 555 and the
manufacturer claims that it usually does not require a "control" capacitor and in many
cases does not require a decoupling capacitor on the power supply. Those parts should
generally be included, however, because noise produced by the timer or variation in
power supply voltage might interfere with other parts of a circuit or influence its
threshold voltages.

19. 19
Details of Pins of 555 Timer
The connection of the pins for a DIP package is as follows:
Fig.13 555 Timer Pin Connections

20. 20
Pin 5 is also sometimes called the CONTROL VOLTAGE pin. By applying a voltage to
the CONTROL VOLTAGE input one can alter the timing characteristics of the device.
In most applications, the CONTROL VOLTAGE input is not used. It is usual to connect
a 10 nF capacitor between pin 5 and 0 V to prevent interference. The CONTROL
VOLTAGE input can be used to build an a-stable multi vibrator with a frequency
modulated output.
Modes of Operation of 555 Timer
The IC 555 has three operating modes:
Non-stable Mode: In this mode, the 555 functions as a "one-shot" pulse generator.
Applications include timers, missing pulse detection, bounce free switches, touch
switches, frequency divider, capacitance measurement, pulse-width modulation (PWM)
and so on.
A-stable (free-running) Mode: The 555 can operate as an oscillator. Uses include LED
and lamp flashers, pulse generation, logic clocks, tone generation, security alarms, pulse
position modulation and so on. The 555 can be used as a simple ADC, converting an
analog value to a pulse length. E.g. selecting thermistor as timing resistor allows the use
of the 555 as a temperature sensor: the period of the output pulse is determined by the
temperature. The use of a microprocessor based circuit can then convert the pulse
period to temperature, linearize it and even provide calibration means.
Bi-Stable Mode or Schmitt Trigger: The 555 can operate as a flip-flop, if the DIS pin is
not connected and no capacitor is used. Uses include bounce-free latched switches.
555timer in A-stable mode is used.

21. 21
A-Stable Mode of Operation of 555 Timer:-
Fig.14 Standard 555 A-stable Circuit
In A-stable mode, the 555 timer puts out a continuous stream of rectangular pulses
having a specified frequency. Resistor R1is connected between VCC and the discharge
pin (pin 7) and another resistor (R2) is connected between the discharge pin (pin 7), and
the trigger (pin 2) and threshold (pin 6) pins that share a common node. Hence the
capacitor is charged through R1 and R2, and discharged only through R2, since pin 7 has
low impedance to ground during output low intervals of the cycle, therefore discharging
the capacitor.
In the a-stable mode, the frequency of the pulse stream depends on the values of R1, R2 and
C:
The high time from each pulse is given by:
and the low time from each pulse is given by:

22. 22
where R1 and R2 are the values of the resistors in ohms and C is the value of the
capacitor in farads.
The power capability of R1 must be greater than.
Particularly with bipolar 555s, low values of must be avoided so that the output stays
saturated near zero volts during discharge, as assumed by the above equation. Otherwise
the output low time will be greater than calculated above. The first cycle will take
appreciably longer than the calculated time, as the capacitor must charge from 0V to 2/3
of VCC from power-up, but only from 1/3 of VCC to 2/3 of VCC on subsequent cycles.
To achieve a duty cycle of less than 50% a small diode (that is fast enough for the
application) can be placed in parallel with R2, with the cathode on the capacitor side.
This bypasses R2 during the high part of the cycle so that the high interval depends
approximately only on R1 and C. The presence of the diode is a voltage drop that slows
charging on the capacitor so that the high time is longer than the expected and often-
cited ln(2)*R1C = 0.693 R1C. The low time will be the same as without the diode as
shown above. With a diode, the high time is
Where Vdiode is when the diode has a current of 1/2 of Vcc/R1 which can be determined
from its datasheet or by testing. As an extreme example, when Vcc= 5 and Vdiode= 0.7,
high time = 1.00 R1C which is 45% longer than the "expected" 0.693 R1C. At the other
extreme, when Vcc= 15 and Vdiode= 0.3, the high time = 0.725 R1C which is closer to the
expected 0.693 R1C. The equation reduces to the expected 0.693 R1C if Vdiode= 0.
The operation of RESET in this mode is not well defined, some manufacturers' parts
will hold the output state to what it was when RESET is taken low, others will send the
output either high or low.

23. 23
Types/Varieties of Stun Gun
1. Compact Stun Guns
The compact handheld stun guns are about the size of a TV remote or calculator and
they must touch the subject when used. The original XR-5000 design in 1983 had the
electrodes spread farther apart to make the noisy electric arc between the electrodes as a
more visible warning. Some such devices are available disguised as other objects, such
as umbrellas, mobile phones or pens.
Fig.15 A concealable weapon shaped and sized like a lipstick tube
2. Electric Shock Prods
The larger baton-style prods are similar in basic design to an electric cattle prod. It has a
metal end split into two parts electrically insulated from each other, or two thin
projecting metal electrodes about 2.5 centimeters (1 in) apart, at an end of a shaft
containing the batteries and mechanism. At the other end of the shaft are a handle and a
switch. Both electrodes must touch the subject. In some types the sides of the baton can
be electrified to stop the subject from grasping the baton above the electrodes.
Some models are built into long flashlights also designed to administer an electric shock
with its lit end's metal surround (which is split into halves insulated from each other).

24. 24
Fig.16 Electric Cattle Prod from the 1950s
3. Stun Belts
A stun belt is a belt that is fastened around the subject's waist, leg, or arm that carries a
battery and control pack, and contains features to stop the subject from unfastening or
removing it. A remote-control signal is sent to tell the control pack to give the subject
an electric shock. Some models are activated by the subject's movement.
The United States uses these devices to control prisoners. One type is the REACT belt.
Some stun belts can restrain the subject's hands and have a strap going under his groin
to stop him from rotating the belt around his waist to reach its battery and control pack
and trying to deactivate it. Stun belts are not generally available to the public

25. 25
Stun Gun Design and Operation
Stun Gun Design
Actually, here we require two of designing- the a-stable multi-vibrators design and voltage
multiplier design.
Fig.17 Circuit Diagram of Stun gun
Designing the circuit requires pioneer step of deciding the output voltage. Here our
requirement is to generate a 10KV DC voltage from 1000V.
From the equation,
Vout = (2Vin + 1.414)S, where S is number of stages.
To obtain voltage of 100KV, about 5 stages of voltage doubler would be required.
Here we design a 5 stage voltage multiplier circuit generating an output voltage of 10KV.
Since input voltage is around 1000V, each capacitor should have a voltage rating of at least
2000V. Since here operating frequency is low, of the order of Hertz, we require a 2500V,
10uf.
For designing the a-stable multi-vibrator circuit, we select a 555 timer. To design a 555
timer in a-stable mode, passive external components need to be selected.
Assuming a maximum operating frequency of 50Hz and a duty cycle of 75%, I
calculate R1 to be around 1.44K, R2 around 720 ohms and C1 around 10uf. Here we

26. 26
select a 2K potentiometer, 720 ohm resistor and 10uf capacitor. Since this is a low
frequency operation, a MOSFET IRF530 is used.
Operation of Voltage Multipler in Stun Gun Circuit
As soon as the switch S1 is pressed, the a-stable operation of 555 timer starts. A
pulsating electric signal of low current is produced, which is stepped up using a step up
transformer, to a voltage of around 1000V. The signal from the timer is fed through a
MOSFET switch.
1. During first positive half cycle, capacitor C3 charges through diode D1, which is
forward biased. Since the capacitor has no discharge path, it stores the charge.
This produces a voltage equal to the AC input peak value at the end of half
cycle.
2. During negative half cycle, diode D4 is forward biased and capacitor C4 charges
through C3 and D2. At the end of the cycle a voltage equal to double the input
AC voltage.
3. Again during next positive half cycle, diode D3 is forward biased and capacitor
C5 charges. Again during next half cycle, diode D4 is forward biased and
capacitor C6 charges. At the end of cycle, a voltage equal to 4 times the input
peak voltage is obtained at point 2.
4. The sane procedure applies for other two stages and finally a voltage equal to 10
times the input voltage is obtained at point 5.

27. 27
Testing and Caution during Operation
Testing
Before inserting the battery and closing the case, a few test measurements should be made to
ensure correct operation.
With the ground clip connected to the battery (do NOT connect the complete clip to the
battery ONLY the ground), connect a volt or multi-meter between the positive clip and
the positive terminal of the battery. Set the meter for current reading, and press S1. You
should measure a current of approximately 300 to 500mA. The 'Neon' light should be
glowing. With a high voltage multi-meter or VOM, you should measure about 2000
volts on the output terminals. Those measurements indicate proper circuit operation. Let
the unit run for about one minute (keep pressing S1). Transistors Q1 and Q2 should be
warm, but not hot to the touch (BE CAREFUL!). Insert the battery in the holder and
close the case. That wraps up the
Operation and Use
Activate the unit by pressing S1. The Neon-bulb will light indicating the stun gun is
fully charged and ready to use. Notice also that only one pole of the neon light will
glow, indicating DC voltage present. It is important to remember that the device holds a
charge even after S1 is off. To discharge, (do not press S1) touch the electrodes to a
metal object and note the healthy spark discharge.
The Electronic Stun Gun was designed as a self-defense weapon for use against vicious
dogs or other attacking animals. The device is most effective when the electrodes contact
an area of low resistance such as skin or flesh. Those include the snout or mouth since the
resistance of those areas is much lower than areas of hair or of fur. The electrodes could
be pointed to penetrate these areas better. The stun gun generates great stopping power.
One contact will give a powerful jolt and should discourage any further attacks.

28. 28
The device can burn and heat materials with low resistance. Those include flesh,
moistened paper or wood, etc. That makes the unit potentially hazardous to humans.
Remember, that the stun gun is not a toy but a quality electrical appliance and therefore
must be treated accordingly. Use the mostly discretion with this device! Another use for
this device is as a high voltage DC power supply. It may be constructed as variable
power supply if output taps are taken from various stages of the voltage multiplier
section. Remember, always disconnect the battery and fully discharge the capacitors
before working with the circuitry. Note that if you decide to 'Turbo-charge' your unit,
select diodes which can handle that voltage. This unit can easily be damaged (and stops
working) by incorrect parts choice. So be careful and watch yourself.

29. 29
Advantages
1. Stun guns come in many shapes in forms, making them easier to use quickly and
effectively.
2. A stun gun can be particularly effective when a victim has already been grasped by
the attacker and the stun gun is available for use.
3. Stun guns also require less accuracy than other devices and are often enough of a
threat to deter an attacker from actually attacking in many cases.
Disadvantages
1. Since this involves high voltage pulse production, the circuit is hazardous and should
be implemented on hardware with uttermost care and precaution.
2. One should not touch the output with bare hands as this high voltage, low current
signal can send shock waves through the body, disrupting the nervous system.
3. While designing the circuit, factors like corona discharge, stray capacitance are not
taken into account, which may affect the output.
4. This circuit should never be used in presence of persons with cardiac issues.
5. It is actually to get a 9:1000 step up transformer at low frequency and its construction
is quite complex.

30. 30
Applications
1. It can be used for security purpose for individuals from intruders.
2. It can be used as protection from animals.
3. It can be used as modern warfare equipment.
4. It can be used as a self defence equipment, especially for ladies.

31. 31
References
1. http://www.electronicshub.org/stun-gun-circuit/
2. http://www.555-timer-circuits.com/stun-gun.html
3. http://www.electroschematics.com/335/stun-gun-simple-schematic/
4. http://www.homemade-circuits.com/2013/08/stun-gun-circuit.html
5. http://www.instructables.com/id/DIY-Taser/