Manual

This project requires a ping pong ball
or similar size ball (not included).
Assembly:
1. Place all parts on the base grid,
including the two vertical snap wires
(V1).
2. Mount the white LED (D6) and
press switch (S2) on two other
vertical snap wires, which are then
mounted on the first ones, so that
the white LED is upside down (so it
will shine down onto the
phototransistor (Q4)) and the press
switch is sideways.
Turn on the slide switch (S1). The
white LED should be on, but the color
LED (D8) should be off and there
should be no sound.
Facing the press switch, throw the
ping pong ball to try to hit the button
on the press switch, or get the ball
through the opening under the press
switch. The color LED (D8) lights and
the horn (W1) sounds when you
succeed (or come very close).
The press switch is used only to help
stabilize the vertical snap wires, so do
not press it.
Use the preceding circuit, but
remove the press switch (S2)
and lower the upper two
vertical snap wires so the
circuit looks as shown here.
Try to throw the ping pong ball
through the opening between
the vertical snap wires.
Project 134
Hole Ball
Mounted upside down:
Mounted sideways:
Mounted upside down:
Mounted sideways:
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Project 133 Button Ball