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Circuit Schematic

Board Layout

Parts List

Part

Purpose

Cost

Prototype board

Circuit board to rotate.

$9.99

Airworks Household fan

Rotate board on motor shaft, cool down nearby onlookers. 

$19.99

AT90S2313-10 Microcontroller

Control LEDs.

$5.54

SE3420, 10 MHz Crystal Oscillator

Provide external clock to microcontroller.

$1.98

Microcontroller Programmer, PG-302

Download .hex files to microcontroller.

$95.00

20 Pin Chip Seat

Provide removable seat for microcontroller, allow easy reprogramming during testing.

$.39

DN6848 Hall Effect Sensor

Positional reference for board.

$1.76

Magnet

Generate signal from Hall Effect sensor.

$3.80

LEDs (1 blue, 7 green)

Motion gives display for clock.

$10.50

ULN2803 Octal Transistor Array

Increase current to improve LED brightness.

$3.50

Push Button Switch

Provide reset signal to microcontroller.

Provided by UVIC

6Volt Lithium Battery

Power for circuit.

$14.99

MC78051 Voltage Regulator

Step down power to 5 Volts and regulate at that level.

Provided by UVIC

Battery Holder

Support and connection for battery to board.

$.80

Heat Sink

Cool voltage regulator.

Provided by UVIC

The cost of all purchased parts (which were used) came to a grand total of $168.24.

Circuit board mounted on the motor shaft of the fan.

Take a Break!