How to Build a Real Working "Brain Ray" (Transcranial Magnetic Stimulation Demo)

About: IF YOU HAVE QUESTIONS PLEASE EMAIL ME AT Hello I'm Mad Scientist Trevor Nestor. If you like my instructables see my youtube channel!
Transcranial Magnetic Stimulation is a method for stimulating brain tissue, and in recent years there has been much research on this method as a replacement for Electroconvulsive (Shock) Therapy to combat mental disorders such as depression. Trans-cranial Magnetic Stimulation is a safer non-invasive alternative.

In this instructable, I will show you how you can demonstrate the ability to stimulate neurons in your arm to make you twitch without invasive methods. Essentially, you will learn how to construct your own single pulse "brain ray!" You will be a real "brain hacker" and this is excellent for science fairs.

This device differs from those in the medical field in that it is lower power and only shoots one pulse at a time, while medical TMS machines pulse continuously.

The device essentially works by inducing electrical currents in neuronal tissue through a large electromagnetic pulse.

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Step 1: Collecting Capacitors

Collect a bunch of used disposable cameras. These may often be picked up for free at stores where film is developed. Take the guts out of each camera wearing gloves with rubber insulation. Discharge the capacitor in each camera for safety using a metal object. You will need to salvage 54 120uF capacitors.

Step 2: Make a Capacitor Bank

Create a capacitor bank by arranging 6 rows in series of 9 capacitors in parallel as shown in the video. Wear protective gloves while handling these capacitors or working with high voltage.

Step 3: Make the Coil

A coil is needed to create an electromagnetic pulse to induce current in neuronal tissue. Create a coil with 15 turns of heavy duty wire. Make sure that the wire is insulated. For my coil, I wrapped it up with electrical tape and added a tube where users can grip it.

Step 4: Arrange the Circuit

Create the circuit as shown in the video. Connect the capacitor bank to a switch and then the coil of wire so that the switch dumps the capacitors' stored energy into the coil when turned "on," Use a heavy duty switch.

Step 5: Charge the Capacitors

Use a charging circuit from one of the disposable cameras to charge each row of the capacitor bank as if it was charging a single capacitor. There is usually a button on the back of each charging circuit that would have been the "charge" button on the camera. solder the button so that is is always turned "on." Use alligator clips to connect the charging circuit to charge each row, paying attention to the polarity of the capacitors designated by a stripe on each capacitor's side.

Once all of the capacitors are charged (check using a voltmeter and while charging the capacitor bank wear rubber insulated gloves) place the coil over a spot on your arm. If you place in in the right spot, your hand will twitch and/or you will feel the pulse! This means that your trans-cranial magnetic stimulator is a success!

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    11 Discussions


    1 year ago

    Your antenna should be in a figure eight, or you will never hit what you aim at.


    3 years ago

    Hi, could you give access to your video?


    3 years ago

    Video is private. I want to see plz


    "Transcranial Ultrasonic Stimulation" seems be more exact.

    But it seems, we could not buy this "capacitive micromachined ultrasonic transducers" (?).

    I would try easier learning. Make temporarily a normal person to a savant.

    Perhaps a disturbed savant, but only temporaily.

    Kim Peek could not dress himself, but this "Rain Man" has remember every day in his life. Weather, News, his meals etc..

    Why only 15 turns? Is there a photo without tape?

    Is it possible to make smaller coils, to "disturb" smaller brain areas?

    Yes this magnetic stimulation is not so exact in the depth (focusable?) like ultrasonic stimulation, but if we can not make a DIY ultrasonic "thinking cap" (like Giro Gearloose "roof with chimney and a birds nest") this would be actually the only possibility.

    Several coils over several brain areals.

    For example, "shut up" all "emotional areals" for learning math.

    Or the areal that filter the impressions.

    Or a "composition" that allows a very "focused" mind for a exam etc..

    I think, this could not be forbidden at a shool. This would not be "crib".

    It is only your knowledge, not from a hidden paper.

    By the way, is it not possible to use "live" voltage from the net?

    This construction here, allows only single pulses.

    1 reply

    5 years ago on Introduction

    Anybody try this to relieve headaches? That's the latest use for TCMS.


    5 years ago on Introduction

    the design for this looks almost identical to an EMP (ElectroMagnetic Pulse)
    It is just a capacitor(s), a switch and an electromagnet. Does this work the same as an EMP?


    6 years ago on Introduction

    "Discharge the capacitor in each camera for safety using a metal object" -- I think you mean "with a metal object that you don't mind losing a small chunk of the end of, and while standing well back from the resulting flying metal blob".

    I know this because I unintentionally discharged one of those things with a (slipped) screwdriver, the end of it has never been the same since. Nor was a section of the PCB track that disappeared into a copper plasma flash!

    It's better to use a resistor, and check the voltage with a meter. For bonus points, you can fit a resistor across the terminals of your DMM, set on volts, and probe the capacitor. Watch the voltage go down.

    Otherwise, I really hope your coil and wiring insulation is good.


    6 years ago on Introduction

    Be careful, those capacitors store as much power as a defibrillator and could easily kill someone.