This live steam engine is available here:
From EngineDIY: BUY NOW: Hero's Engine
Hero’s Engine: the very first steam engine ever devised, the Aeolipile is a radial steam jet reaction turbine, an a invention attributed to Hero of Alexandria in the year 1 AD. Water within the spherical container is heated to produce steam which exits through nozzles directed at right angles to the radial direction, and by Newton’s third law these jets produce a torque about the rotation axis. There is no historical record of this engine being put to practical use in ancient times- except perhaps as the world’s first physics toy!
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From EngineDIY: BUY NOW: Simple Stilring Engine
See other featured DYI devices here: EngineDIY Models
Simple Stirling Engine: Perhaps the simplest piston engine ever devised- a single piston powered by a tiny alcohol lamp. Glass components allow a view of the internal workings of this design, and the interesting startup behavior from oscillation to full rotation. Heat engines produce mechanical motion from a difference in temperature- here the piston side is near room temperature (the central aluminum post is an excellent conductor and acts as a heat sink as the gas flows through), and the test tube is kept at high temperature via the flame, with metal fibers to help conduct the heat into the air (this component is called the regenerator). Swipe to see the elegant assembly of this model, and swipe again to see the engine power down. This external combustion design is attributed to Scottish engineer Robert Stirling back in 1816.
The Kontax KS90 Stirling Engine is guaranteed to run off the heat of your hand!
From eBay: BUY NOW: Kontax KS90 Engine
Less expensive models will run off the heat from a cup of coffee/tea:
From engineDIY: BUY NOW: Stirling Engine
Precision Stirling Engine: low temperature difference engine turns body heat into mechanical motion. For this engine the heat source is my hand, and the heat sink is the room temperature air- warming the bottom black plate with only the heat of my hand will set this engine running for several minutes. This beautiful KS90 engine is manufactured with precision machined parts by Kontax Engineering Ltd.
Get this tiny working engine here: (brass and stainless steel)
From engineDIY: BUY NOW: Tiny Steam Engine
Two other similar mini-engines to consider: BUY NOW: Mini-Steam 1, Mini-Steam 2
Oscillating Cylinder Steam Engine: a functional “wobbler” type piston steam engine complete with boiler and flywheel. In this design the cylinder and piston both rock back and forth, acting as the valve mechanism to allow the hot steam to enter through a small hole, and then exit on the next stroke out through the tiny exhaust port in the top. Takes about 4 minutes to get going after the lamp is lit. A tiny version of the invention that powered the industrial revolution.
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From EngineDIY: BUY NOW: Steel Ball Cyclotron Accelerator
Solenoid Magnetic Accelerator: six electromagnet coils push a steel ball to terminal velocity. Each coil is triggered to briefly energized only when an infrared led and sensor circuit detects the presence of the ball. The steel ball’s speed seems limited by the strength of the temporary magnetic field and the friction it encounters from the track. This ring configuration demonstrates proof of concept for a means of accelerating steel marbles and I hope to incorporate these coils in other marble run designs I will share in the future. Uses a 12V power supply.
Get this device for a great price here:
From EngineDIY: BUY NOW: Vertical Mendocino Motor
From engineDIY: BUY NOW Horizontal Levitating Motor (on all models here-remove brown protective film to reveal clear acrylic on rotor)
Mendocino Motor: vertical and horizontal versions- each face of a solar cell is connected to a coil of copper wire across from the opposing solar cell. When the rotor is lit from one side the lit solar cell provides electric current to the coil in the opposite position which becomes a temporary electromagnet that pushes against the permanent magnets in the base propelling the rotor to rotate. As the rotor turns, the coil that moves into the position near the magnet is likewise energized by the solar cell currently at the top- one can say the light commutates this motor. Magnetic bearings to reduce friction in both models. Invented in the 1960s by Daryl Chapin of Bell Labs and popularized by Larry Springs of Mendocino CA
Create amazing Telsa coil lighning at an affordable price! Please be sure to employ all appropriate safety precautions when utilizing any electrical circuity.
From engineDIY: BUY NOW: Disk Tesla Coil
Click here for similar amazing devices from engineDIY
Disk Tesla Coil: incredible coronal brush discharges form intricate miniature lightning in this variation of the famous air core double-tuned resonate transformer invented by Nikola Tesla in 1891. In this novel design the coil is created using modern printed circuit board (PCB) technology producing a spiral of many conductive windings, so thin and close together it looks a bit like a gold phonograph record. The 10 cm long sparks are made possible by a very high voltage, but also a very fast discharge of a capacitor, and each lightning flash is accompanied by a dramatic popping sound characteristic of capacitor discharge (shown up close in 240fps slow motion). Powered by a 24V DC supply, this unit is fairly safe due to a low current (mA)- the discharge feels like a light tickle (but don’t touch the electrode- it gets hot).
Get one here:
From engineDIY: BUY NOW Solar Levitating Motor (on all models here-remove brown protective film to reveal clear acrylic on rotor)
Mendocino Motor: each face of solar cell is connected to a coil of copper wire under the opposing solar cell. When the rotor is lit from above the top solar cell provides electric current to the coil in the bottom position which becomes a temporary electromagnet that pushes against the permanent magnet in the base propelling the rotor to rotate. As the rotor turns, the coil that moves into the bottom position is likewise energized by the solar cell currently at the top- one can say the light commutates this motor. 2D magnetic levitation is provided by permanent magnets where an acrylic plate constrains the third dimension, and makes for a nice bearing surface for minimal friction. Invented in the 1960s by Daryl Chapin of Bell Labs and popularized by Larry Springs of Mendocino CA
Get this demonstation here:
From EngineDIY: BUY NOW: Electric Generator
I upgraded this version with a larger LED light bulb:
From Amazon: BUY NOW: 3V LED lightbulbs and E26 Socket
Generator Teaching Demo: The electrical energy that comes to your home is produced by some device somewhere moving a coil of wire next to a magnet to produce an electric current (known as Faraday’s law of induction). This tabletop demonstration uses a crank and belt drive to spin the coil between the north and south poles. The ends of the coil are attached to the two smooth metal pieces on the shaft (the commutator) that makes contact with the output wires and connects to the lightbulb. Maximum current is produced when the axis of the coil is at a right angle to the magnetic field- so the current comes in a series of pulses and the bulb flashes on and off. Physics of energy transfer: mechanical kinetic energy→ electrical energy→ light energy.
Get this very nice working model engine here, choose a configuration:
From EngineDIY: BUY NOW: Stirling Engine
From EngineDIY: BUY NOW: Stirling Engine with Generator
From EngineDIY: BUY NOW: Stirling Engine Simple Vehicle
Stirling Engine: an elegant model of an external combustion heat engine with dual reciprocating pistons which operates by cyclic compression and expansion of air. Heat one cylinder with the cute little alcohol burner and this model gets up to speed quickly. Pyrex glass allows one to view the hot cylinder in operation (shown here in slow motion) and this version of the model includes a small generator to convert some of the mechanical energy into electrical energy which then powers some LED lamps. This design is attributed to Scottish engineer Robert Stirling back in 1816- a working piece of the industrial revolution for your desk top!
Get an amazing reproduction here:
From engineDIY: BUY NOW: Tesla's Egg of Columbus
Get an aluminum phiTOP "egg" here: BUY NOW phiTOP
Tesla’s Egg of Columbus Replica: an egg of brass mysteriously spins and stands upright in this museum quality replica of Tesla’s famous demonstration from the 1893 World’s Fair in Chicago that first showcased the principles behind wireless power transfer and his AC induction motor. The base has no moving parts- instead special copper windings (very similar to Tesla’s original design) form four electromagnet coils on a circular steel core, and a special circuit supplies each with AC currents in such a way that a rotating magnetic field is created. This rotating magnetic field from the coils under the concave glass induces electric eddy currents to flow in the metallic brass egg. These currents within the conducting metal of the egg then create their own magnetic field, which by Lenz’s law oppose the initial fields underneath and pushes the egg to spin. Finally, the oblong egg stands up vertically (when spun with sufficient rotational velocity) due to physics similar to that of the tippe-top. Flipping the switch reverses the rotation direction induced by the coils.
Get a similar inexpensive simple module here:
From EngineDIY: BUY NOW: Mag Lev Kit
Electromagnetic Levitation Module: this bare bones engineered control system uses an adjustable electromagnet (the copper coil) and a Hall effect magnetic field sensor (embedded in the center of the the coil) to levitate a neodymium magnet and keep it from falling. A feedback loop informed by the Hall effect sensors allows fine tuning of the magnetic field to exactly balance the pull of gravity, all powered by a 12 power supply. Once trapped the magnet can also rotate, creating a nice way to display a small piece of kinetic illusion art hanging from a chain. A no frills design that shows the fairly simple circuit and components of such a levitation feedback system.
Get this kit here (comes complete as shown in my video):
From engineDIY: BUY NOW: Magnetic Levitation Module
The featured sculture is by Bathsheba Grossman, affordable and beautiful math art available here:
From Etsy: BUY NOW: Soliton Sculpture
Electromagnetic Levitation Module: this engineered control system uses adjustable electromagnets (four copper coils) and and two Hall effect magnetic field sensors (held firm embedded in white silicone) to levitate an 5cm diameter neodymium magnet platform about 3 cm in mid-air. A feedback loop informed by the Hall effect sensors allows fine tuning of the magnetic field to exactly balance the pull of gravity, and is powered by a standard USB connection. The platform also rotates, perfect for showcasing one of my metal 3D printed mathematical sculptures by Bathsheba Grossman.
Get this inexpensive version that makes big sparks!
From EngineDIY: BUY NOW: Wimshurst Electrostatic Generator
Wimshurst Electrostatic Generator: this device uses two counter rotating disks of metal pads to separate charge via induction. The repulsion felt by electrons as the triangle plates pass by each other pushes charge to flow across two conducting rods, one on each side, which allows the charge to stack up. This excess charge is then stored in old fashioned cylindrical capacitors (Leyden Jars) until the resulting 30,000+ Volts is achieved to jump the air gap. This device goes back to 1883- invented by James Wimshurst.
Luciteria (highly recommended) sells this cube and 80 other elements in many formats- start your collection today!
From Luciteria: BUY NOW: Lucite Cube Element 10 Neon
Need a mini Tesla Coil? Click here for details: Mini Tesla Coil
Element 10, Neon: a pure sample of the famous noble gas in a glass ampule encased within a lucite cube. But how can we know that the glass tube is actually filled with neon gas? If the sample is brought near the 50,000 Volt high frequency electric field of a miniature Tesla coil, the gas will glow with the characteristic orange light from the electron energy transitions specific only to neon. Note that the glow deceases as the sample is moved away from the coil in proportion to the electric field intensity- and that there is an excitation threshold, the gas needs a higher intensity (closer to coil) to initiate the glow discharge but will still glow when moved further away.
Mini Tesla coil with wire end attachment- get one here:
From engineDIY: BUY NOW: Mini Tesla Coil
Long exposure image captured using this Slow Shutter app:
From App Store: BUY NOW: Slow Shutter Cam
Corona Discharge Trajectories: the ejected electron stream propels the end of a thin wire connected to a miniature Tesla coil. The corona discharge creates a glowing plasma at the end of the wire, but also imparts momenta that pushes the wire’s end into a final state circular orbit. The more interesting behavior occurs during the initial transient orbits which seem to be hypotrochoid type curves beautifully captured here using the Slow Shutter app. Please see seven posts back for details about this mini Tesla coil.
Get this beautiful little engine here:
From EngineDIY: BUY NOW: Stirling Engine
Stirling Engine: a very pretty and fully functional model of the famous external combustion heat engine, powered here by a tiny alcohol lamp (with an almost invisible flame). Heat engines produce mechanical motion from a difference in temperature- here the glass cylinder and piston side is kept at high temperature via the flame (to expand the gas within), and the cool side is the metal cylinder and displacer piston which acts as a heat sink to re-cool (and contract) the gas and then send it back to be heated again each cycle. This module also includes a tiny generator and LED circuit. Swipe to see more detail and watch the engine power up. This closed-cycle regenerative heat engine design is attributed to Scottish engineer Robert Stirling back in 1816.
Get this amazing heat engine here:
From EngineDIY: BUY NOW: Nitinol Loop Heat Engine
Get a sample of Nitinol wire here:
From Educational Innovations: BUY NOW Nitinol Memory Wire Spring
Thermobile: Nitinol wire loop heat engine- the memory wire straightens out when heated (contact with heat conducting small wheel) causing the wheels to spin, providing mechanical kinetic energy from a cup of warm tea water. Swipe for a demonstration of Nitinol wire, a special alloy of nickel and titanium that can be trained to a specific shape at high temperature- bend it up at room temperature and it will snap back into shape when exposed to moderate heat such as hot tea water. This remarkable property is a type of solid state reversible phase transition known as a martensitic transformation.