arduino:sansui-repair
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arduino:sansui-repair [2019/04/23 21:05] Ilias Iliopoulos [Circuit description] |
arduino:sansui-repair [2024/02/02 21:46] (current) Ilias Iliopoulos Added DISQUS |
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| ====== Repair and bring back to life a 27-year old Sansui AU-X517R audio amplifier with Arduino ====== | ====== Repair and bring back to life a 27-year old Sansui AU-X517R audio amplifier with Arduino ====== | ||
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| + | {{htmlmetatags>metatag-keywords=(arduino, sansui, repair, audio, amplifier, au-x517R, au-517) | ||
| + | metatag-description=(Repair an old Sansui audio amplifier with Arduino) | ||
| + | }} | ||
| ===== Introduction ===== | ===== Introduction ===== | ||
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| In the stator, the common pin is wired to a metal ring near the center. Twelve contacts are placed around the perimeter. One contact is a bit wider than the others and is electrically connected to the internal ring. The rotor has two contacts, which are wired together. One maintains contact to the ring and the second rotates around the stator contacts, connecting with each one of them while rotating. This means that my conceptual 12-contact model was mostly accurate, including the "feeling" that the rotation from an active pin 12 to an active pin 2 takes a bit more time. This happens because the common contact is connected to itself during part of the rotation. In addition, the stator part of the common contact is a bit wider than the other contacts. **Although the code works well at its current version, in order to be absolutely precise, I must set the output voltage of the resistor ladder to 0V instead of high-Z, when the rotor passes through the common contact, i.e from circle position 352 to 7 which is the last half of the last segment and the first half of the first segment. In addition, I could set the width of the "gap" sections a bit larger than the width of the contacts, as shown in the stator photo.** | In the stator, the common pin is wired to a metal ring near the center. Twelve contacts are placed around the perimeter. One contact is a bit wider than the others and is electrically connected to the internal ring. The rotor has two contacts, which are wired together. One maintains contact to the ring and the second rotates around the stator contacts, connecting with each one of them while rotating. This means that my conceptual 12-contact model was mostly accurate, including the "feeling" that the rotation from an active pin 12 to an active pin 2 takes a bit more time. This happens because the common contact is connected to itself during part of the rotation. In addition, the stator part of the common contact is a bit wider than the other contacts. **Although the code works well at its current version, in order to be absolutely precise, I must set the output voltage of the resistor ladder to 0V instead of high-Z, when the rotor passes through the common contact, i.e from circle position 352 to 7 which is the last half of the last segment and the first half of the first segment. In addition, I could set the width of the "gap" sections a bit larger than the width of the contacts, as shown in the stator photo.** | ||
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| + | **END OF UPDATE** | ||
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| If you have any feedback, please contact me via [[https://www.fryktoria.com/wiki-contact.html|this contact form]] | If you have any feedback, please contact me via [[https://www.fryktoria.com/wiki-contact.html|this contact form]] | ||
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| + | ~~DISQUS~~ | ||
arduino/sansui-repair.1556042758.txt.gz ยท Last modified: 2019/04/23 21:05 by Ilias Iliopoulos