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ADDING A POWERFUL MOTOR OR SOLENOID

V. Ryan 2004

 

The outputs of a Pic Microcontroller are rated at 3 volts. This will drive solar motors and other low powered motors/devices. These are normally powerful enough for school projects. However, if a more powerful motor or a solenoid is required a transducer module can be used. One example of a transducer driver is the power transistor circuit and a secondary power source shown below.

   

   

 

The high power transistor TIP 31A is ideal for this circuit. The connections are shown above. A motor, solenoid or other output device can be connected. Normally a 9 volts secondary power source is used, especially for school projects.

   

   
 
   

The diagram above shows a PCB board arranged to hold the components for this simple output module. In examinations this type of module is sometimes called a transducer module.

   

QUESTIONS:
1. Draw the transducer module shown above but replace the solenoid with a motor.
2. Describe a practical application of the transducer driver shown above.

   

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