Thanks to Bobby for sending in his great jukebox project! Check out the tutorial on Instructables.
The volume control knob on many jukeboxes is located in the most inconvenient place possible. It is done purposely to discourage drunken bar patrons from blasting their music resulting in annoyance of their fellow barflys. The standard location for the volume control knob is in the middle of the back of of the jukebox against the wall. To change the volume of a jukebox an intoxicated listener must pull the jukebox away from the wall, grope around for the knob, twist it, then move the jukebox back to its original position, without anybody noticing this activity. Most jukeboxes have an optional remote control on a long wire for the bartender to control the volume. Some models have a rheostat that mounted in a little box with a momentary switch. The remote rheostat controls the volume. Twisting the volume control knob raises or softens the music volume. The momentary switch controls the “Cancel/Reject button”. Pressing this button will eject the current record playing. If the record is scratched of extremely distasteful it can be ejected by pressing this button. The Seeburg SMC 1 Disco does not have such a simple remote control. The remote control uses a motor that attaches to back of volume control rheostat. It is supposed to behave like a hand turning the control knob. They are expensive and look unreliable. The parts are 35 years old. It is difficult enough to keep the jukebox running, without this additional complexity. I thought about the problem for a while, then decided I can twist a knob with an arduino.
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