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Jeff Wilson         jwilson@vtc.edu
Dave Carlson   dcarlson@vtc.edu

                               
                               

Electrical:


Electrical System Overview


Signal Conditioner Circuit:
04-18-04


This conditioner is a low level DC to AC converter. It works by amplifying a small DC signal into a 555 timers operating range. The 555 timer then works as a chopper making the DC into a square wave with the same magnitude as the DC input. The signal is then knocked back down using a voltage devider and fed into the sound card. This was needed becuase our sound card only reads AC signals.

This design came about with help from S. Colwell.

Yaw Motor Controller Circuit:
04-19-04


A 2-way (bidirectional) motor driver circuit, designed to operate with two inputs, taken from an HC908 micro-controller. The 30 Ohm resistor represents the motor.

This design came about with help from J. Murphy.

Fan Motor Controller Circuit:
04-10-04


This motor driver circuit serves a dual purpose. It controls the seven indevidual fans using seven Z40 MOSFets. These MOSFets work by getting an enable voltage from the control HC08 and this voltage enables ground for a separate power supply that is powering each fan. It also acts as a splitter to allow only certain lines from the parrallel port to go to the control HC08. The parrallel port lines cannot be connected to any pins on the HC08 that are set as outputs. If they were to be connected, a voltage supplied to an output enabled pin could damage our microcontroller.

This design came about with help from J. Murphy.
Professor WindMill > 2004