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Videos uploaded by user “mopatin”
DIY Super Electromagnet
 
02:12
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin How to Make a BIG and Powerful Electromagnet with the Primary of the transformer of a microwave oven. Remove the Secondary. With Iron or Steel (ferromagnetic materials) it attracts with a really great strength. With non ferrous metals like aluminum and copper it repels them due to Eddy currents.
Views: 671103 mopatin
Tape Recording Head Experiments
 
03:00
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin Functions of play and record with a tape head. How to make a rudimentary tape head. A recording tape head can be used as a magnetometer or magnetoscope to detect magnetic fields.
Views: 109921 mopatin
DIY Spot Welding Machine
 
03:01
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin How to build a Spot Welder with a microwave oven transformer. Never connect the transformer to the grid before removing the secondary coil, because it produces 2000 Volts at 500 mA, this is LETHAL. A secondary with more turns than primary rises the voltage. On the other hand, a secondary with less turns lowers the voltage and put more amperes to draw. With a thick cable we make a 2 turns coil that delivers 2 or 3 volts and many many amperes. This is why the cable has to be very thick.
Views: 4702432 mopatin
How to Build a Magnetic Stirrer
 
06:01
How to make a lab magnetic stirrer with a motor from a CD-DVD drive unit, a hard disk drive magnet and some esay materials like wood, a switch, jack connector, etc. You only need to buy the magnetic stirrer bar, (or stir bar) i.e. on Ebay. It is not recommended to DIY the magnetic bar because the pro ones are cheap and covered with teflon, so they dont react with chemicals. http://goo.gl/dbXbIv or http://goo.gl/v7mYBL http://en.wikipedia.org/wiki/Magnetic_stirrer http://en.wikipedia.org/wiki/Stirring_rod
Views: 174802 mopatin
Spinning Top in a Vacuum Chamber
 
01:59
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin A top spinning in a vacuum chamber lasts much longer than outside. This is because the friction with the air.
Views: 692818 mopatin
Cutting Glass Rings
 
01:17
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin How to cut Glass Rings from jars, bottles, etc. Put waste vegetable oil up to the position of the cut and heat it quickly with a hot iron.
Views: 120372 mopatin
Magnetic Levitation KIT
 
02:12
This is a test of a diamagnetic levitation kit I bought on eBay. It consists of a set of 64 squared neodymium magnet plates that I will put on a steel plate. Then I will put some tiny pyrolytic graphite sheets above the magnets. They levitate due the diamagnetic repulsion from the magnets to the graphite sheets. https://en.wikipedia.org/wiki/Diamagnetism https://en.wikipedia.org/wiki/Pyrolytic_carbon https://en.wikipedia.org/wiki/Neodymium_magnet https://en.wikipedia.org/wiki/Levitation
Views: 136016 mopatin
Concentrated Photovoltaics with a Power Transistor
 
02:48
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin With the famous 2N3055 power transistor it is possible to make a solar cell or photovoltaic cell, a really small one. But with the help of a magnifying glass it produces enough electricity to move a tiny motor. This motor works with a voltage as low as 0.3 Volts. It is very important to use a radiator heat sink. This one is made of aluminum. 2N3055 Transistor: http://en.wikipedia.org/wiki/2N3055 CPV: http://en.wikipedia.org/wiki/Concentrated_photovoltaics Video from RimstarOrg http://www.youtube.com/watch?v=526xslmO6Ds
Views: 75377 mopatin
Quicklime and Water Reaction
 
01:31
What happens when we put water into calcium oxide or quicklime? The quicklime is turned into slacklime or calcium hydroxide. The reaction is very exotermic and as you can see melts some parts of the plastic bowl.
Views: 77680 mopatin
Mercury Tilt Switch and Reed Switch
 
01:19
Test of how woks a mercury tilt switch and a magnetic reed switch. They are connected in series in a circuit with a battery and two light bulbs. When the mercury switch is tilted to one of its sides the contact is made and the circuit is closed. When a magnet approaches to the reed switch the circuit is closed. Both are useful for alarms and other automatisms.
Views: 60479 mopatin
DIY Jet Toy Car for Kids
 
02:51
How to make a Jet Toy Car for children in order to show Newton's Third Law of movement. You only need a rectangular piece of cardboard, drinking straws, two skewers, a balloon, four bottle plastic caps and adhesive tape. Tha action of the air getting out of the balloon implies a reaction that moves the vehicle forward.
Views: 496556 mopatin
Copper Snail Barrier. Really Easy to Make.
 
01:15
How to make an extremely easy barrier to stop snails from climbing trees. You only need copper tape or easier to get and cheaper, copper wire from an electrical cable. Wrap the copper wire or strip around the trunk of the tree and the snails will stop at it, not crossing the copper. Why? It is not clear. Somebody says that it is because of toxicity of copper and other beacuse of an electrolytic reaction that produces a small electric current that disturbs the snail. https://en.wikipedia.org/wiki/Copper https://en.wikipedia.org/wiki/Snail Channel Page: http://www.youtube.com/user/mopatin/ Google + : http://www.google.com/+mopatin
Views: 27681 mopatin
Bike dynamo disassembly experiments
 
02:28
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin Experiments with a dynamo from a bicycle. Really it is not a dynamo but an alternator. It generates AC current.
Views: 18780 mopatin
Photovoltaic Solar Charger for Smartphones and more
 
02:13
Several tests with this charger I just bought from: http://www.banggood.com/buy/SKU091977.html It is a nice charger, but, at least mine, can't charge the iPhone 5s. It charges perfectly on HTC and one Samsung smartphones, even in the shadow.
Views: 9526 mopatin
How to Make a Lab Vacuum Chamber
 
03:42
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin This Vacuum System allows to use Bell Jars of several sizes. I use kitchen glass bowls as bell jars. The base is an aluminum plate of 10 mm thick. The gasket is rubber from an inner tube from a car tyre. The connectors and valves are GAS 1/4 thread. The four (4) spark plugs give electrical isolation and air tightness. Each one is connected to a banana conector (banana socket). This provide an easy way to use the chamber with detectors, sensors (i.e. electric conductivity pressure sensors); electrodes for plasma arcs, cathodic rays, X-rays, triodes (thermionic emission), etc.)
Views: 116340 mopatin
Thermal Expansion Experiment Trick
 
02:06
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin How to detect the tiny expansion of a metal bar when heated. I use a needle as a roller that moves a straw.
Views: 20923 mopatin
Ball Mill with parts from a Printer: 3 approcahes
 
01:39
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin This ball mill is made with parts from an inkjet printer. I make three approaches. 1. Radial 2. Axial 3. Eccentric
Views: 14801 mopatin
Escape Velocity Simulation
 
01:49
A two dimensional simulation of the escape velocity. A piece of fabric is put tight on a frame. In order to shoot the ball we have a magnet cannon.
Views: 20671 mopatin
Free Energy Light Bulb TRICK. I INSIST, TRICKKKKK!
 
01:31
Do you really think it's possible? Alternating magnetic fields regenerating themselves, but you need to feed the system in order to begin the cycle. Sincerely, I think it is NOT possible. EXPLANATION of the trick: https://www.youtube.com/watch?v=-poc9JSHoWA
Views: 11511604 mopatin
Motor with a Nickel Coin. Curie Thermal Engine.
 
02:16
How to make a Curie motor with a nickel coin, a magnet and a source of heat. It works beacuse when a part of the coin is heated above Curie temperature (or Curie point) it loses its ferromagnetic properties so the magnet attracts a cooler part of the coin and it turns. The the new cooler part that is near the magnet is heated again and the previous heated part is far from the flame so it is cooling down. https://en.wikipedia.org/wiki/Heat_engine https://en.wikipedia.org/wiki/Curie_temperature https://en.wikipedia.org/wiki/Ferromagnetism https://en.wikipedia.org/wiki/Nickel https://en.wikipedia.org/wiki/Pierre_Curie http://www.cienciabit.com
Views: 38552 mopatin
Experiments with Magnets, Cans and More
 
01:57
A series of experiments with magnets, aluminum cans and othere parts and pieces. This experiments turn around the eddy currents. That currents are induced by a changing magnetic field near a metal electrical conductor. That currents generate a magnetic field opposed to the first one that brakes and drags the magnet-conductor system. http://en.wikipedia.org/wiki/Eddy_current http://en.wikipedia.org/wiki/Electromagnetic_induction http://en.wikipedia.org/wiki/Metal_detector http://en.wikipedia.org/wiki/Inductive_sensor http://en.wikipedia.org/wiki/Electrical_conductor http://en.wikipedia.org/wiki/Induction_heating http://en.wikipedia.org/wiki/Eddy-current_testing
Views: 18018 mopatin
Fast Crystallization Experiment
 
04:07
Experiment in which we are going to make a rapid crystallization. To do this, we dissolve the potassium nitrate (KNO3) in water at 100ºC. The solution was then poured into a Petri dish which will be used as a crystallizer. As the solution cools down, potassium nitrate crystals are formed. https://en.wikipedia.org/wiki/Crystallization https://en.wikipedia.org/wiki/Potassium_nitrate https://en.wikipedia.org/wiki/Solubility https://en.wikipedia.org/wiki/Supersaturation https://www.youtube.com/mopatin
Views: 62390 mopatin
DIY 5 Ton Hydraulic Press
 
01:17
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin How to make a homemade hydraulic press with a car jack, u channel steel (u beam) and threaded bar. It is not finished. The jack should be bolt down or attached to the base.
Views: 2480038 mopatin
DIY Electric Motors as Generators.
 
02:13
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin In these demonstrations I use a stepper motor as a two phases alternator (AC) and some DC motors that act as a dynamo (DC), I convert potential energy of a weight into electrical energy rotating a DC motor with a thread. Also, we can see a hand crank flashlight that is also a radio receiver. This gadget also stores electricity into a NiMH battery.
Views: 673587 mopatin
How to Make a Primitive LED with Silicon Carbide
 
02:01
In 1907 Captain Henry Joseph Round applied a voltage to a piece of silicon carbide (SiC), also know as Carborundum. He saw that it gave light. It is a phenomenon known as electroluminiscence and it was the first ancestor of the LED or Light Emitting Diode. https://en.wikipedia.org/wiki/Light-emitting_diode https://en.wikipedia.org/wiki/H._J._Round https://en.wikipedia.org/wiki/Silicon_carbide https://en.wikipedia.org/wiki/Semiconductor https://en.wikipedia.org/wiki/Diode https://en.wikipedia.org/wiki/Electroluminescence Susbcribe ► https://www.youtube.com/subscription_center?add_user=cienciabit Do you want to contribute subtitles? ► http://www.youtube.com/timedtext_cs_panel?tab=2&c=UCM7Dwmo0031iRaGdDunPaQw Cienciabit ► http://www.cienciabit.com Cherry Blossom - Wonders by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100382 Artist: http://incompetech.com/
Views: 1540 mopatin
Chilling Endothermic Reaction
 
02:14
You can low down the temperature mixing just baking soda with vinegar. That is an endothermic reaction, it absorbs heat. Channel Page: http://www.youtube.com/user/mopatin/ Google + : http://www.google.com/+mopatin
Views: 2236 mopatin
Curie temperature demonstration
 
00:49
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin The Curie temperature or Curie point, is the temperature at which a ferromagnetic or a ferrimagnetic material becomes paramagnetic on heating; A heat-induced ferromagnetic-paramagnetic transition is used in magneto-optical storage media, for erasing and writing of new data. Famous examples include the Sony Minidisc format, as well as the now-obsolete CD-MO format.
Views: 33835 mopatin
Quicklime and Water Exothermic Reaction
 
02:24
We will measure the heat produced when quicklime (calcium oxide) reacts with water. The reaction is exothermic, because it releases heat.
Views: 44257 mopatin
Vibrators, how do they work?
 
01:16
How can vibrate your smartphone? Simple experiments with vibrators. How to make a vibrator with a motor and an eccentric weight. Vibrating alarm motor. Vibrating solar bug.
Views: 110753 mopatin
Power a SATA 2,5'' hard disk drive with USB
 
03:16
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin We can use an internal 2,5'' HDD as external, but using SATA and feeding it with a USB cable instead a power supply. I.e. we can edit a complex video project (Premiere, Final Cut Pro, etc.) in different computers without copying it to the local hard disk. If the HDD were a 2,5'' USB one, we couldnt edit with it, because USB is very slow compared to SATA.
Views: 120877 mopatin
Solar Water Heater with Plastic Bottles
 
03:03
How to make a water heater with big plastic (PET) bottles. Inside each bottle there is a 3.5 meteres piece of 4 mm drip watering tubing. This heater takes advantage of the greenhouse effect inside the bottles. It is like the heat inside a car in the sun in summer. Since when the circuit is stopped the water heats more inside the tubing it woul be a good idea to use a timer with i. e. 1 minute ON and 1 minute OFF. This also would protect the pump motor from excessive heating. With a small water pump the water is cycled and the temperature rises. It would be better to use a 12 volt DC motor water pump connected to several solar cells. You can also try to paste a sheet of aluminum foil in order to concentrate more heat inside the bottles. The solar water heater is scalable, so you can connect more bottles and groups of bottles in order to heat a swimming pool.
Views: 3038121 mopatin
Calcium Carbide Production Plant
 
02:25
Calcium carbide (CaC2) industrial synthesis from coke and limestone. Very high temperatures are needed in order to make the chemical reaction.
Views: 14883 mopatin
Eddy Current Brake Experiment
 
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Experiment with a neodymium magnet pendulum. The magnet passes abovevery near a block of wood and a block of aluminum. Because of the eddy currents generated on the aluminum block the movement of the magnet is damped until the magnet is braked. http://en.wikipedia.org/wiki/Eddy_current_brake http://en.wikipedia.org/wiki/Electromagnetic_brake http://www.railwaygazette.com/news/single-view/view/eddy-current-braking-a-long-road-to-success.html http://en.wikipedia.org/wiki/Regenerative_brake http://en.wikipedia.org/wiki/Retarder_(mechanical_engineering)
Views: 45086 mopatin
How to Recycle Lead to Make a Weight
 
03:22
Channel Page: http://www.youtube.com/user/mopatin/ From a filthy lead pipe I found in a skip. I melt it with the help of a blowtorch, always outdoors, since lead vapors are TOXIC. I pour it in a metal can and put a wire handle. I have made a weight. I paint it with two layers of enamel paint in order to avoid direct contact with the skin, since the lead is TOXIC.
Views: 18364 mopatin
Curie Pendulum. How to Make a Heat Engine.
 
04:01
A Curie pendulum is a simple heat engine based on the lose of ferromagnetic properties of a material when it reaches the Curie temperature or Curie point. We have a nickel (Ni) coin hanged from a copper wire so it is attracted to a magnet. A haet source is place below the coin and when it reaches the Curie temperature it is released from the magnet so it swings away from the magnet and cools down, so it gets ferromagnetic properties again and is attracted by the magnet again. And so on. https://en.wikipedia.org/wiki/Heat_engine https://en.wikipedia.org/wiki/Curie_temperature https://en.wikipedia.org/wiki/Ferromagnetism https://en.wikipedia.org/wiki/Nickel https://en.wikipedia.org/wiki/Pierre_Curie http://www.cienciabit.com
Views: 295236 mopatin
Never Swallow Magnets!!!
 
02:30
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin This is a demonstration of how DANGEROUS is to let the children and toddlers play with MAGNETS. There is a kind of magnets especially strong, they are called iron boron neodymium magnets or more commonly neodymium magnets. You can see them as tiny balls that form strings like rosary beads, as little blocks or cylinders, disks, etc. Even if not put into the mouth or nose they are dangerous. They approach each other so fast that can throw broken pieces at very high speed to the eyes. They even can prick your fingers if you are not careful.
Views: 6741 mopatin
Magnetic Key Ring Holder (DIY)
 
01:38
How to make a magnetic keyring holder with a piece of wood and five neodymium disc magnets. It is very easy to build and very convenient.
Views: 17898 mopatin
Acetylene Lamp Explosion. Read description.
 
03:07
SAFETY NOTE: This is only a lab test for a few seconds use. Acetylene reacts with copper to give cuprous acetylide, which is explosive. So a copper tube is NOT recommended for an acetylene lamp (carbide lamp). On the other hand. the plastic could melt if used for more than a few seconds because the reaction of calcium carbide with water is exothermic and releases heat. How to make a calcium carbide or acetylene lamp. The first version had a big jar that exploded because it has air mixed with the acetylene. The second version is a small one with a tiny plastic jar. https://en.wikipedia.org/wiki/Carbide_lamp https://en.wikipedia.org/wiki/Calcium_carbide https://en.wikipedia.org/wiki/Acetylene
Views: 29750 mopatin
Limelight: Quicklime Light
 
01:23
The limelight is a kind of lighting used at the end of the 19th century in theaters and music halls. It is produced when heating with a high temperature torch a piece of quick lime. The light is emitted by a combination of the phenomenons of incandescence and candoluminescence. https://en.wikipedia.org/wiki/Limelight https://en.wikipedia.org/wiki/Incandescence https://en.wikipedia.org/wiki/Candoluminescence https://en.wikipedia.org/wiki/Oxyhydrogen https://en.wikipedia.org/wiki/Limelight_(1952_film)
Views: 6976 mopatin
Dancing Coils
 
01:45
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin Coils dancing and jumping due to Eddy currents. The AC power through the coils generates magnetic fields. The coils are on a thick aluminum plate so the magnetic fileds induce currents in the aluminum. That currents generate magnetic fields that interact with the first ones.
Views: 2795 mopatin
How to Weld Plastic (thermoplastic)
 
03:24
How to weld thermoplastic, like polyethylene, polypropylene, nylon, etc. https://en.wikipedia.org/wiki/Polyethylene https://en.wikipedia.org/wiki/Polypropylene https://en.wikipedia.org/wiki/Thermoplastic https://en.wikipedia.org/wiki/Plastic https://en.wikipedia.org/wiki/Welding http://www.cienciabit.com
Views: 5945 mopatin
Clean Copper with  Vinegar,  Salt and Baking Soda
 
00:53
How to clean rusted copper with vinegar and salt. The sodium bicarbonate is for neutralizing the acid, because if not, the acid would corrode the surface of the copper. https://en.wikipedia.org/wiki/Copper https://en.wikipedia.org/wiki/Salt https://en.wikipedia.org/wiki/Vinegar https://en.wikipedia.org/wiki/Sodium_bicarbonate Cienciabit ► http://www.cienciabit.com
Views: 48297 mopatin
Amazing DIY Air Gun. Powerful.
 
04:33
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin Compressed Air Cannon. With a 10 mm barrel from a copper pipe. It uses a piping nipple chamber in order to acumulate air before shooting.
Views: 62126 mopatin
DIY Rudimentary Speaker Experiments with a Wire and a Magnet.
 
01:36
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin Basic experiments of electromagnetic transduction from electric amplified signal to mechanical movement that sounds (acoustic signal) . (amplified signal → magnetic field → motion → air pressure). If you wnt to repeat the experiment take care of not frying the amplifier, because the impedance of the coil is very low so too much current flows at the amp and it gets hot.
Views: 54907 mopatin
See the Joule Effect in a copper wire
 
00:51
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin Current flowing through a single copper wire. We can see how it melts and how is possible to cool it with air. This is why we need thick cables for high power appliances like heaters or irons.
Views: 9573 mopatin
435 psi (30 bar) Compressor from a Refrigerator Motor
 
01:37
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin How to make a silent and high pressure air compressor from the motor of a refrigerator. You have to braze a piece of brass to the output pipe in order to have 1/4 GAS thread to connect fittings. I has, of course, low flow, but high pressure. It is dangerous to work with such pressures so a lot of caution is needed. It would be a good idea to put the compressor inside a box or cage and to work with goggles or better with a face shield.
Views: 615267 mopatin
Almost Perpetual Motion Levitron in a Vacuum Chamber
 
04:24
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin Perpetual Motion Levitron in a Vacuum Bell Jar. Of course the vacuum is less than perfect and the levitation lasted less than 1 hour. Perhaps with a diffusion vacuum pump it will last a lot more. I think that the instability of the movement (precession) may create kind of tidal forces that weakens the rotation movement through magnetic induction.
Views: 117655 mopatin
DIY Easy Barometer
 
03:31
How to make a barometer with a few materials. You only need a rubber balloon, a glass jar, a piece of wire, double sided tape and a drinking straw. You can download this document with graduated scales: http://www.cienciabit.com/cienciabit/reglas.pdf
Views: 15955 mopatin
Repairing a Pot Lid Handle
 
02:29
How to repair a broken pot lid handle. The handle was spot welded so apparently it was almost impossible to repair. I used a tap in order to make threads and fix with screws. I used stainless steel screws instead of galvnized ones, because zinc is toxic.
Views: 9544 mopatin
Magnetic braking demonstration
 
01:22
Channel Page: http://www.youtube.com/user/mopatin/ Twitter: https://twitter.com/mopatin Google + : http://www.google.com/+mopatin Magnetic braking demonstration with a hard disk drive and a neodymium magnet. It is not possible to stop completely the disk because the lower the speed the lower the pull.
Views: 9208 mopatin