Homemade Electrical/Mechanical/Physics Trainer

  • Thread starter jmatejka
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In summary, this toy is a "two-stroke engine" that demonstrates mechanical, electrical, and physics principles. It is powered by a 9 volt battery and has a rotary switch that controls a RGB L.E.D. The engine's timing sprocket has a protruding bolt that pushes a microswitch at "TDC."
  • #1
Hello Everyone, I'm new to the Forum, Physics has always been a love of mine, I have been fortunate to have associated with people who have worked with some of the greats(Feynman,Gell-Mann, and Gamow)

I decided I wanted to make a “toy” for Matthew’s first Christmas, a “toy” with an educational purpose. This toy would demonstrate Mechanical, Electrical, and Physics principles. This toy was constructed from an old Army ammo box, and a routered wooden top. Old robot parts, and old automation parts from Omtronics resistor winders were also used. A couple of parts may be older than I am. The parts I had, so little money was spent on them, however, more than 100 hours was spent putting it all together. This “toy” is not kidsafe, the intent is for Matthew to have something he can pass on to his children, when they are old enough. Many parts were turned on the lathe for proper fit, the “jack of all trades” skills used to build this, don’t seem to be taught to many kids anymore.

Electrical: The electrical system is powered by a 9 volt battery, it is switched and fused. Schematic symbols are shown above most of the components. Mechanical and Electrical components are identified on the side of the box. A detailed schematic drawing was omitted on purpose. All glass components are protected behind plexiglass.
The black button energizes the SPDT relay and a high intensity blue L.E.D.
The red button energizes an incandescent light and a buzzer.
The ten position rotary switch controls a RGB L.E.D., Red,Green,Blue, as well as, seven mixes of these colors are selectable.
The radio tube is non-functional,except, for a Red Laser L.E.D. that illuminates it. The laser is activated by tilting the mercury switch AND using the magnet to close the reed switch.(switches are wired in series).
The Inductor, Capacitor, and Resistor,(LCR), are non-functional.
When the “two-stroke engine” reaches Top-Dead-Center,(TDC), a “L.E.D.sparkplug” illuminates, a cooling fan comes on, and the revolver fires. The engine’s timing sprocket has a protruding bolt, which pushes a microswitch at “TDC”. The revolver sprocket is mechanically in time with the engine.

Mechanical: What you see is what there is. A simple engine with half the cylinder ground away to show the piston position, etc. Timing mechanisms, linear power transmission, rotary power transmission. Power transmission 90 degrees out of phase. A flywheel and a Lever and Pulley.

Physics: Physics being the foundation of Mechanical AND Electrical Engineering, this has already been applied, however, electron affinity is demonstrated on the side of the box. Several elements,(metals), as well as, alloys were made into “washers”, these “washers” were arranged in order of “electron affinity”. The concept being that electrons would rather flow from the Silver to the Copper, rather than the other direction. This can be demonstrated with an Ohm Meter, reversing positive and negative leads will lead to different resistance values. It should be noted only a small difference in electron affinity exists between these metals/alloys, resistance values will vary by less than a tenth of an ohm. A one ounce bar of .999 Silver was “sacrificed” to make the Silver washer.

Feel Free to comment, Thanks, John


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Some more pics


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Last of pix


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What is a Homemade Electrical/Mechanical/Physics Trainer?

A Homemade Electrical/Mechanical/Physics Trainer is a device or set of materials designed and constructed by an individual to help them learn and explore various concepts in electrical engineering, mechanical engineering, or physics.

What are the benefits of using a Homemade Electrical/Mechanical/Physics Trainer?

Using a Homemade Electrical/Mechanical/Physics Trainer can provide hands-on experience and practical application of theoretical concepts. It can also be a cost-effective way to learn and explore new concepts without having to purchase expensive equipment or tools.

What types of projects can be done using a Homemade Electrical/Mechanical/Physics Trainer?

The projects that can be done using a Homemade Electrical/Mechanical/Physics Trainer vary depending on the design and components used. Some common projects include building simple circuits, creating basic mechanical systems, and conducting experiments to test various physics principles.

Can a Homemade Electrical/Mechanical/Physics Trainer be used by beginners or is it more suitable for advanced users?

A Homemade Electrical/Mechanical/Physics Trainer can be used by both beginners and advanced users. The complexity of projects can be adjusted based on the individual's knowledge and skill level, making it suitable for a wide range of users.

What materials are needed to make a Homemade Electrical/Mechanical/Physics Trainer?

The materials needed depend on the specific design and purpose of the trainer. Some common materials may include breadboards, resistors, capacitors, motors, gears, and other basic electronic and mechanical components. These materials can often be found at a local electronics store or purchased online.

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