> > > The 60 mA is an *Absolute Maximum Rating*, not what you should be > driving them with consistently! A typical drive current for the LED > when "on" would be 10 mA, and most 4N26 data sheets specify transfer > curves with 5, 10, and 20 mA forward current through the LED. >
You nailed it. I just found this nice write-up on the 4N26 and it looks like 6-10mA is the sweet spot and lots of level shifters and drivers will do that. http://www.martyncurrey.com/activating-the-shutter-release/ > I'd just set the motor power to 5V. > Perfect! The boards will have those inputs already and since we're talking about not using onboard drivers, this could work. I see the only problem being where there might be 3 local pololu drivers used and the 4th needs the offboard driver. > > Or you could put a small 5V regulator on the board...a 78L05 is pretty > inexpensive. :) > and wouldn't be dumping much waste heat since this is all low current stuff. -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/machinekit. To view this discussion on the web visit https://groups.google.com/d/msgid/machinekit/2a9bfc9f-c108-47fe-9061-f37f3411e182%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
