Need a small/tiny light duty 5 rpm motor

This rated at 13 RPM at 6V but you can put a pot/resistor in series to reduce the RPM.

https://www.pololu.com/product/1596

Pete

Norton posted:

This rated at 13 RPM at 6V but you can put a pot/resistor in series to reduce the RPM.

https://www.pololu.com/product/1596

Pete

I ordered a handful of these gear motors from ebay (not necessarily the  Pololu brand, about $2.50 each) a few months back for a waterwheel and windmill project, and they work really well.   Although I control mine with an arduino (for randomized variable speed), these motors respond very well to a simple reduced voltage. Somewhere around 1volt would probably work well for a revolving sign for a 6v 30rpm model.  (I didnt see a slower rpm for this particular vendor.)

https://www.ebay.com/itm/6-12V...p2057872.m2749.l2649

Where else but OGR forum to learn new things?  arduino

Charlie

Yikes.  You shouldn't have to pay $20 (plus shipping?) for a low speed gearmotor.  If you are willing to wait a bit for shipping from Asia, as suggested above I'd think less than $5 is a better target price.  Also, since the load is a light weight sign the need for a beefy metal gear mechanism is not so critical.

If your wallet is not flush with currency, how about pairing the following (from eBay):

I don't know what you're planning for a power source, but let's say you have Accessory AC 14-16V.  Using the voltage converter shown above, you can use a screwdriver to adjust/set the output voltage to 3V DC, 4V DC, 5V DC, etc. to tune the DC gearmotor speed.  Note that the gearmotor shown has a threaded shaft which can make things much easier - YMMV.  Think carefully about how exactly you're going to mate your sign to the gearmotor.

Thanks guys, will work something out with all this information. Stan, a threaded shaft may make my plan easier.