| Electronics > Projects, Designs, and Technical Stuff |
| Very slow quadrature generator |
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| Domagoj T:
Two potentiometers being rotated back and forth by a small stepper motor? |
| Wolfgang:
Wont last long, but certainly looks cool. :-DD |
| Domagoj T:
https://www.vishay.com/docs/51056/p30l.pdf Should last 20+ years at max frequency with uptime of 8 hours per day. $65 at quantities of 1. Stepper motors are dirt cheap, so there's that, at least. |
| Wolfgang:
OK, why not do it the hard way. 65$ per pot, some metal hardware, stepper controller, lot of power compared to PICs, but you can *see* it work. It does *not* have to make sense to be fun. >:D |
| Domagoj T:
That was just the first search result for "long life potentiometer". There several in the P11L series (also by Vishay) that are in the $15 ballpark. Metal hardware is available on evil bay, for about $1 a pop. https://www.ebay.com/itm/Flexible-Shaft-Coupling-Joint-Stepper-Motor-Coupler-Connector-3-10mm-All-Size/153132080540?hash=item23a7621d9c:m:mf3Q6A8KUC9VoqJ-qHGx3Cw:rk:2:pf:1&frcectupt=true Stepper drivers, additional 1$ a pop. https://www.ebay.com/itm/1PCS-A4988-Stepper-Motor-Driver-Module-3D-Printer-Polulu-StepStick-RAMPS-RepRap/221921771119?epid=883626200&hash=item33ab917e6f:g:BpsAAOSwl9BWKyv1:rk:1:pf:1&frcectupt=true For controller there is Arduino, there are some awesome stepper libraries available. OP said power is not a problem. I'm still unsure of the final application, but imagine opening the enclosure and seeing a pair of googly eyes staring back at you while spinning around. Would it work though? |
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