RE as in the kind you find on stereo for volume control, they tend to have detents, and also feel "damped" as you turn them.
Having a hard time finding:
- inexpensive
- have switch when you press the knob for user navigation "select"
- 4 wire design, common, 2 direction, 1 switch
- easy to obtain
Also what about a good source of larger 1.5" knobs? nice for navigation.
Can anyone point one out.
Richard.
Yes..
5 pins (the momentary switch is isolated).Yes, indeed.
1.25" black diamond-knurled aluminum anodized shell okay?E-mail me and I'll send some data.
Best regards, Spehro Pefhany
-- "it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
Have a look at the Bourns EPS. But I am affraid they are not very cheap. WE now use a replacement (not footprint compatible) but I don't know make/type. Printed on the back:
ddm 427
Drawback of this device is that the shaft is electrically connected to one of the pushbutton contacts. Cost us a few FET's before we found out. No problem when using a plastic knob.
This device uses a custom knob (plastic) of about 1.75".
Stef.
Try COPAL devices - a bit costy, but otherwise very good...
regards
Dejan
Digikey
Panasonic, CTS,Bourns and others. From $2.50 and up
I've wondered why the mechanical-switch ones (rotary quadrature encoders) are two or three dollars (Digikey's 1 or 10 qty) yet the optointerrupter ones (the same thing that there are two of in each of umpteen million computer mice, made and sold at really low cost) start at $20. I would have guess that high-end oscilloscopes and logic analyzers [I recall an HP model where this was the ONLY input device] were not the only application of opto rotary encoders. I've used a video monitor that had one for setup, but thinking about the cost and low usage, I presume it used a cheap, mechanical-switch model. Maybe the OP was only looking at/for the opto ones and not the mechanical-switch ones.
I've used lots of opto rotary encoders from US Digital. Very well built,better than HP,esp. for install + repairs in products. Cost is relative .Cheap mechanical units aren't made 'forever',opto's usually are.If you factor in cost over limetime of product,optos win everytime. Also opto unit have a broader range of counts per revolution( up to 4000+) mech maybe 256 ? hth jay
Have a look at Alps gear for the rotary encoders with switches. The website is atrocious, but I eventually found something like what you may be looking for. They've got insulated shafts, non-insulated shafts, buttons, etc.
-- Regards David Milne
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