Introduction: Simple Pulse Motor

Picture of Simple Pulse Motor

This is my another simple working pulse motor which is more simple, easier and faster to make using a simple cheap reed switch that you can buy. This pulse motor works better with some adjustments, proper positioning of reed switch, magnet rotor and coil. I will mentions the materials used for making it work below.

Another advantage of using reed switch is that you can trigger rotor movement as low as 3 volts or little less.

Step 1: Materials Required

Picture of Materials Required
  1. Plastic rotor (you can use a lid of cold cream of this matching size)
  2. A simple reed switch you can buy from electronics market or online.
  3. Glue or a strong adhesive for sticking magnets equally to four sides of rotor
  4. Copper wire about 26 to 32 awg
  5. At least 4 neodymium magnets of at least size 10mm X 5mm
  6. A paper pin
  7. A matchbox empty one
  8. Stapler pins
  9. A neon bulb [ Optional ] (i got from old mosquito repellent)
  10. Thin wooden board or you can use card board used for packaging
  11. Power supply of at least 6 volt, could be battery or dc adapter
  12. Few jumper wires
  13. A Ferrite or air core coil (i got from old junk electronic seller)
  14. Some little cardboard pieces for proper alignment adjustment between magnet and coil, magnet and reed switch
  15. A thin stand with pin hole on board for rotor be mounted on for spinning.
  16. Small screw nails for fixing rubber band for inductor coil and ramp for reed switch as seen in image.

Step 2: Procedure

Picture of Procedure

Follow the above shown circuit diagram which is simple.

  1. First assemble all the required materials, take the plastic rotor, insert the pin into its center.
  2. Take rotor stand with pin hole similar as you see in picture and stick it to board with supporting material fixed to the board.
  3. Stick four neodymium magnets equally to four sides of rotor and also vertically equal in between on all four sides.
  4. Make sure all magnets are facing either north or south.
  5. Take the empty matchbox and stick the reed switch as shown in figure either using glue or staple pins and also stick the matchbox to board using adhesive.
  6. You can now mount rotor on the stand using pin and check if it rotates smoothly

Connect the reed switch with one end to induction coil and other to battery or adapter, which is connected to coil. You can also connect with bread board and test the neon bulb following the video. Reversing the direction of reed switch will result change in rotation of rotor clock or anticlockwise.


Ferrite Core Coil
Ferrite coil or air core (without ferrite can be used) for this experiment. Copper coil wingdings have nearly 450 turns with a cylindrical ferrite core inside. If you do not get ferrite, air core coil also works.One advantage in ferrite core is that it produces more energy with same current. More wingdings also will produce more energy. Attach the core to the board as shown in the video or any other way you like. Bring reed switch, rotor, ferrite core together in alignment and make connections as you can see in diagram or video.

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