r-357 electroshock bullet: non-lethal neutralizing bullet
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Ethics Statement The design of the device is all our own
original creation while being guided by open-source high-voltage circuit topologies.
This Non-Lethal Neutralizing Bullet is built to be used in the general public. It follows specifications that will make it non-lethal upon use.
Jasson Guevara(EE), Toyam Cox (EE), Andy Ampuero (EE), Sameem Alimi (EE), Young Hong Choi (EE)[email protected], [email protected], [email protected], [email protected], Yxc,[email protected]
Erik Jonsson School of Engineering & Computer ScienceThe University of Texas at Dallas
Arche Protection Devices, Inc.
Corporate Mentors: Corwin Osborne, D.A. DavisFaculty Mentor: Bilal Akin UTDesign I: Spring 2019
R-357 Electroshock Bullet: Non-Lethal Neutralizing Bullet
Background According to the New York Times, nearly
40,000 people died from guns in the U.S.in 2017.
According to the Washington Post, nearly1000 people were shot and killed bypolice in 2018.
Our project aims to provide an alternatebut effective solution to replace standardammunition with a solution that will notkill the target, yet still have the desiredresult.
ProblemHow can unnecessary gun-related deaths be
reduced?The number of firearm related deaths in theU.S. can be reduced with the use of non-lethal weapons. Current TASER and otherstun gun solutions on the market only workthrough direct contact, or over a short range,and can be very expensive. The R-357 is alower cost device that is intended to be shotout of any conventional 12-Gauge shotgunand immediately neutralize any assailant,without resulting in death.
Objectives To create a less-lethal defensive
alternative to regular bullets for use by law enforcement and the general public.
Shock and neutralize assailants.
Be less expensive than similar alternatives.
Provide enough current at the right frequency to cause neural interruption.
Minimize the circuit to fit into a 12-gauge shotgun shell.
Conclusions We achieved our goal to minimize the design to fit inside a common 12 Gauge Shotgun shell at a low cost. We achieved desired output results. Research shows that current pulses at around 30Hz and between 10 to 50mA will cause painful shocks and
loss of muscle control to an assailant. Our output met these values and can sustain the pulses for a minute which gives the officers enough time to restrain the target.
By providing non-lethal ammunition that capitalizes on the unique advantages offered by firearms, police officers and civilians alike will have realistic options to stop miscreants without resulting in death.
OrganizationSameem Alimi: Team Lead & Circuit Design Jasson Guevara: TestingAndy Ampuero: Hardware Assembly Young Hong Choi: TestingToyam Cox: PCB Design
ResultsPrinted Circuit Board
Output Waveform
UTDesign II: Summer 2019
Payload Design
R-357 Device
We were able to create a device that outputs the required current at our target frequency, pulse length, and duration. The device is small enough to fit in a standard 12-gauge shell and costs less than $10 a round in parts which is 1/16 the price of similar devices.
Special Thanks ToArche Protection Devices Inc., D.A. Davis, Corwin Osborne, Dr. Bilal Akin
and UTD faculty and staff
Performance Metric The success of the project is determined
by the circuit's ability to provide sufficient current to cause neural interruption while fitting in a 12-gauge shotgun shell.
We measured the performance by testing across different loads and observing its effectiveness in varying situations.
Hardware DesignThe device operates using three 3V button cell batteries. It steps up the voltage with a three-stage voltage doubler. The input and output are controlled by a pair of 555 timers running at two different frequencies and duty cycles to control charging up and discharging the capacitors. Currents of 10 to 50 mA at a frequency of around 30 Hz will cause involuntary loss of muscle control. The human body's internal resistance is around 500-1,500 ohms. We chose a peak voltage of 50V to achieve neural interruption.
PCB Design
Schematic