Data Sheet

Project 120 Light Stairs
Place all the parts on the
base grid, then assemble the
parts on the two 90 degree
vertical snap wires (V1).
Position the LEDs to the right
as shown. Turn on the slide
switch (S1); all the lights turn
on and a melody plays.
Adjust the light assembly to
different positions.
Project 121 Light Stairs 2
Use the preceding
circuit, but replace
the 2-snap wires and
1-snap wires under
LEDs D11 and D12
with two 45 degree
vertical snap wires.
Turn on the slide
switch (S1) and adjust
the light assembly to
different positions.
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