BIOELECTRONICS
- 3 bolts (tapered heads) about 1 inch long, 1/8 inch diameter
and 6 washers and nuts to fit. - toggle switch with OFF-ON positions.
- Alligator clip test leads.
Test Plates Assembly
Cut two 3-1/2 inch squares out of stiff paper such as a milk
carton. Cover them with 4½ inch squares of aluminum foil,
smoothed evenly and tucked snugly under the edges. You have
just made yourself a set of open capacitors. Turn the box upside
down and draw squares where you will mount them at the ends of
the box. Don't actually mount them, to save wear and tear on
them, until the rest of the box is complete.
Mount the ON OFF switch on the front of the box, underneath
the right hand plate. Line it up so ON is downward and OFF is
up. (An electronics shop can determine this for you at the time of
purchase.) Label the box with ON and OFF signs.
Two bolts will be reserved for the plates. The third bolt is
used as a terminal where the current from the oscillator circuit
will arrive. Make a hole on the side of the box, near the left hand
plate and mount the bolt so it sticks half way inside and halfway
outside the box. It does not matter whether the head is inside or
outside. Tighten it there with a nut on each side of the box. Label
it TERMINAL. It merely means connecting place.
Mark the center of each square that you drew and each ca-
pacitor you built. Pierce first with a pin; follow with a pencil
until a round hole is made at the center. Mount each plate with a
bolt, fastening it below with a nut. Washers are optional.
The left side connection (terminal) gets attached to the left
plate (bolt) with an alligator clip. Use another clip to attach the
same left plate (bolt) to the ON OFF switch (there are two con-
nections, use either one). Finally attach the ON OFF switch
connection you didn't use to the right plate (bolt). Make sure the