CALAHAN Posted September 27, 2006 Report Share Posted September 27, 2006 I'm trying to find a micro DC motor that will run at 1 rpm. Basically I need a battery powered analog 60 second stop watch that I can hack open - which I cannot find anywhere. Even a battery powered wrist watch with a sweeping second hand would do, but not one that jumps like the quartz movments do. I realize that motors this slow would require reduction gearing and that is fine, as long as the gearing is either on top of the shaft or integrated within the assembley which cannot be more then 1 inch in height. Does anyone have a connections for a product like this?This is for a toy project I am working on.Thanks,Bruce Quote Link to comment Share on other sites More sharing options...
jgeidl Posted September 27, 2006 Report Share Posted September 27, 2006 Can you use a servo? You could use a continuous rotation servo motor with a BASIC Stamp (or other processor) and PWM (pulse width modulation) to make it maove at almost any rate you want...especialy slow.Jim Quote Link to comment Share on other sites More sharing options...
CALAHAN Posted September 28, 2006 Author Report Share Posted September 28, 2006 Sure I could use a servo, as long as it is small. But this basic stamp processor is the issue. Can I buy one that is already made up to do what I want? I bet this would require creating some kind of circuit board, inserting a chip and programming it. This would probably be cost prohibitive, beyond my capabilities, and take up too much room in the toy. Am I right?Bruce Quote Link to comment Share on other sites More sharing options...
jgeidl Posted September 28, 2006 Report Share Posted September 28, 2006 Callahan,I don't know of a chip already programmed and you are pretty close as to what you will need to make this approach work. Perhaps someone has a suggestion that is simpler.Jim Quote Link to comment Share on other sites More sharing options...
ante Posted September 28, 2006 Report Share Posted September 28, 2006 A small RC servo can be run from a simple 555 circuit. Quote Link to comment Share on other sites More sharing options...
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