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Installation is simple and once installed is relatively maintenancethe unit. The purpose of this report is to share the information we have obtained from our experimentation and testing. Accuracy The fan usually stops directly or nearly in f203b of the person, as desired. Using a fan was the standard way of cooling down and still is for many people.

If the value of the variable motorDirection was set to clockwise, PORTA datasjeet the development board is set to a motor step to drive the motor.

Therefore, for optimal operation, if the person using the fan decides to change location, it is suggested that they wait a few seconds before relocating again to allow the output to settle. In addition, the fan includes another setting that allows precise rotation between two people. This was necessary to stop wires from possibly tangling together. Previous 1 2 The system is very easy to use. Unfortunately, once the sensor does detect a human, its output may remain level for as much as 2.

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Senba Sensing Tech DB – PDF Datasheet – Infrared Sensors In Stock |

In addition it may require multiple attempts before actually getting the fan to redirect air flow in the exact desired direction. The schematic can be seen below. The chip amplifies the signal from a PIR Pyroelectric Infrared sensor to detect the motion of a human body. If the motor was stationary before the task was signaled, this task sets the global variable motorDirection to clockwise.

When the motor spun counter clockwise the pointer forwardPtr pointed to the current step, while the pointer reversePtr pointed to the previous step. We do our best to comply with the IEEE code of ethics. In addition dqtasheet structure contained two pointers.

Smart Fan – Human Tracking Fan

We used the safest practices possible in the construction of our platform. It can operating with 2 wirepackage. Unfortunately fans do not have very efficient or useful features when it is desirable to change the direction of air flow.

Because our project includes the use of a high voltage fan, at all times, testing with a fan was done while both members were present. When the PIR datasheft meets certain criteria see functional.

(PDF) D203B Datasheet download

This can damage the digital circuitry in the microcontroller. This pin is connected to the sensor on the left. If the variable motorDirection was equal to stop, no operation will occur. These modes are selectable by the user. Upon detection of a human the sensing circuit responds immediately, causing the circuit output to go high.

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However, since our usual testing environment was in a lab full with people, computers, monitors, and oscilloscopes, we did suffer some confusion as to which dxtasheet of heat were triggering the sensors. To separate the stepper motor from the microcontroller we used 4N35 optoisolators.

External Interrupts on Sensors As discussed previously, upon detection of movement, the PIR circuit output for each sensor goes high. Thus, if the fan was rotating clockwise, and a sensor is activated, the datasheef will immediately begin rotation counter clockwise.

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The code is available for viewing in the Commented Code section. At this point the customer is nice and cool without any effort from their side. Our project did not interfere with other designs as far as we know. As discussed previously, upon detection of movement, the PIR circuit output for each sensor goes high. A standard circuit application was used to detect a person. In addition, neither datasheef us had air conditioning.