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You have to sneak up on this clock, hanging on the end of a slinky. If it sees you coming, it gets the shakes. <br&g...
Using a Roberval balance arrangement (arms in the center), it doesn't matter where I place weights as long as the left and right side have a total eq...
Drill holes in a battery powered clock mechanism and thread wire (I use magnet wire) through the holes.
Tie the slinky to the clock with the wires.
Put a piece of tubing (bright colored rubber eyeglass holder) on the hour hand. Throw the minute hand away; this clock is not for people who watch m...
Attach a one inch square (4 feet long) piece of aluminum tubing to the acrylic base using aluminum angle and small bolts. My acrylic base is about si...
Using four six inch by 1 inch by 1/4 inch pieces of acrylic and a few nuts and bolts, build the Roberval arrangement at the top of the pole.
Drill holes near the end of the three foot long (by 1 1/4 inch by 1/4 inch plexiglass "right" arm). These holes should match the shaker motor (I sca...
Mount the shaker motor.
Secure the slinky at the end of the arm by drilling a hole through the acrylic and wiring the slinky to the arm.
Run wires from the shaker to the center arm--securing them with packaging tape.
Mount the motor and propeller on the left side using aluminum tape or duct tape. Run wires to the center pole. The propeller should pull to the lef...
Add weights on the left side that equal the weight of the right arm, shaker, slinky and clock.
Using double sided tape, attach the two battery supplies to the back side of the upright pole.
Build the circuit described in step one and stick it to the front side of the pole (there is adhesive on the back of the prototype board).
Set the time.
Stand back and admire your clock--before you install the batteries. After the batteries are installed, it should be fairly difficult to sneak in clo...
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Posted:
Sep 24, 2011
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