Kirk Wallace wrote: >I got my serial DAC prototype working, but the first VFD I hooked up >would not accept a voltage only signal, it needed a potentiometer on the >+10 V, Signal and 0V terminals. The other VFD's used a voltage across >the signal input and 0V just fine. Does anyone know how the one VFD >input might be different and a good way to adapt to it? I could use a >serial potentiometer but they usually have a low resolution and it would >be another project to get done. Thanks. > > There should be 10-bit resolution serial pots. That's close enough for a spindle - it's 10RPM resolution on a 10000 RPM spindle. It would probably be better to get an audio (or logarithmic) taper, so you have more resolution at the low end.
Here's one from Analog devices at DigiKey: AD5231BRUZ10-ND, $4.19 single qty. - Steve ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
