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1-wire barometer
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UNIPOLAR STEPPER MOTOR CONTROL CIRCUIT. This circuit controls a small, four-phase, five-wire, unipolar stepper motor, commonly designated the "KP4M4-001." This type of motor was used in many 5 1/4" floppy disk drives in older computers. Now obsolete, such disk drives are often available on the surplus market for a small fraction of the motor's original cost. The stepper motors are easy to extract from the drives, and are ideal for many applications. This arrangement was used in the scale model of a RADAR set to control the position of a miniature parabolic antenna. (Note that some 5 1/4" floppy disk drives used a four-wire "bipolar" motor, which is not compatible with this circuit.)
Using 1-Wire Devices: PicBasic Experiments With The PIC16F877. Using the Dallas DS1820, 1-Wire™ Digital Thermometer. This application shows how to communicate with the DS1820, and helps you to implement them in your designs.
ATTENTION! 1-wire barometer
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