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Here’s the big picture of the dancing dolphin project:

1. Put together an electronic circuit to control the timing of the light display.


2. Create a template for the dolphins and drill holes in a plywood sheet for
   five dolphin outlines by using the template.


3. Wire five arrays of LEDs and resistors onto the plywood sheet.


4. Mount the circuit on the plywood, connect the arrays of LEDs to the cir-
   cuit, and add a plywood board to the back of the project.


5. Turn on the juice (that is, pop in the batteries).
   The circuit sends current to each group of LEDs for about two seconds,
   lighting up and then dimming the dolphins in sequence.

Scoping Out the Schematic .........................................................................

You have but one breadboard to put together for this project, but we make

up for that by making you string 5 LED/resistor arrays, each containing 38

LEDs and 19 resistors.

Take a look at the schematic for the board, as shown in Figure 10-2.

Figure 10-1:

The final

product:

dancing

dolphins.

216 Part III: Let There Be Light