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MIDI Interface for Soundblaster compatible cards |
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MIDI Interface for Soundblaster compatible cards
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24 Line Parallel Interface for the PC (15k) - only schematic
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.)
MIDI Interface for Soundblaster compatible cards
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24 Line Parallel Interface for the PC (540k) Based on the older 8255A, this simple parallel interface provides 24 I/O lines.
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ATTENTION! MIDI Interface for Soundblaster compatible cards, as all other schemes are located on the sites of their rightful owners. We are not liable for the contents of other sites as well as the site having a circuit MIDI Interface for Soundblaster compatible cards. Pressing the button you must get onto a page with MIDI Interface for Soundblaster compatible cards. |
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