feJ Posted January 2, 2006 Report Share Posted January 2, 2006 I'm trying to figure out a simple way to have a motor, hooked up to a timer circuit, that will switch polarity at a set interval. In other words, after, say 3 minutes, the polarity going to the motor will switch, putting the motor in reverse, then after another three minutes switch back. I'm pretty much a novice, so any help with this would be great. It will be part of a sound sculpture for my masters thesis exhibition. Quote Link to comment Share on other sites More sharing options...
Tony_Stoynov Posted January 4, 2006 Report Share Posted January 4, 2006 And don't forgot that not all DC motors can be reversed only with change power supply. Depend of the construction: permanent magnetic, parallel or serial stator you must change poliarity of the rotor or stator or both of them. Quote Link to comment Share on other sites More sharing options...
audioguru Posted January 4, 2006 Report Share Posted January 4, 2006 There will be a huge current surge and mechanical jolt if the motor's direction is changed suddenly.It is best to stop the motor before reversing it. Quote Link to comment Share on other sites More sharing options...
MP Posted January 8, 2006 Report Share Posted January 8, 2006 I am assuming that if this is your Master Thesis, you have had experience programming microcontrollers in the course? Seems like micro and SSR would be pretty simple. Pin 1 high, pin 2 low...wait 3 minutes, pin 1 low, pin 2 high...wait X number of minutes, do whatever else you want.MP Quote Link to comment Share on other sites More sharing options...
ante Posted January 8, 2006 Report Share Posted January 8, 2006 Hi Guys,Don’t you just hate when somebody drops a question like that and then disappears? :( Quote Link to comment Share on other sites More sharing options...
feJ Posted January 9, 2006 Author Report Share Posted January 9, 2006 Sorry to disappear, I thought the site would email me when replies were posted. Anyway, I don't have any experience programming. I'm getting my masters in fine art, so I know a lot about welding and oil paint and all that, but this is my first foray into electronics other than simple wiring.After a lot of consideration I realized that it would be easiest to have the needle move in a full circle rather than up and down for the simple fact that there would be no direction change. I appreciate all the suggestions.If you're interested, images of the piece should be up in about a month at my website: www.jeffreythompson.org Quote Link to comment Share on other sites More sharing options...
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