# Flush/slotted actuated rotary switch knob?

I'm thinking of using the R10015RS02Q SP10T rotary switch for an upcoming project I'm working on.

It's marketed as having a flush/slotted type actuator which I think requires something like a flathead screwdriver to rotate.

What I'd really want is for it to be hand actuated, however all the knobs I've found are meant to be used for a shaft-type rotary switch. I know it's possible to get a shafted SP10T rotary switch, but in my research it's cheaper to get these flush/slotted kinds.

My question is are these flush/slotted actuator devices ever intended to be used with a knob/hand actuated, or am I looking in all the wrong places for a knob?

As a side note, what are these slotted rotary switches usually used for/with (if anything)?

I know this is awfully close to a shopping-type question, I'm justifying it as valid because of this question which asks what type of knob to use with a round shaft potentiometers.

• This switch is not meant for your needs, but there are nice small not expensive ones made for rotating by fingers without using tools. – ExcitingProjects Jan 3 '13 at 5:38

The rotary switch under discussion is typically used for preset / factory setting or maintenance purposes - such as for setting a part of a device address, a configuration value to be read during device operation, or selection of power path for enabling one of several circuit sub-sections.

The particular part you have selected has silver-plated copper contacts (Q suffix) for power routing, rather than low-level signal routing or configuration setting.

The lack of available knobs for this type of switch aligns with the design goal of not making it convenient for end-users to make changes - like having a sticker "No user-serviceable parts inside".

For a hand-actuated equivalent, look for flatted actuator, or knob actuator designs. Some thumbwheel actuated designs are also very cost-effective, especially on eBay or other such sites.

A quick search indicates you may be able to find thumbwheels cheaper than the device you have selected, if 10 positions are not a firm requirement.

Another reason for going with thumbwheels is that they are less obtrusive than knob / shaft devices, hence allowing sleeker enclosures!

• OP's switch is for top-mount, these thumbwheels are for side mount. Any nice top-mount ones you can suggest? – ExcitingProjects Jan 3 '13 at 5:39
• @ExcitingProjects Top mount isn't a requirement for me, but 10 channels is. I can/have found other switches, I was just curious about this type. – helloworld922 Jan 3 '13 at 7:04
• @helloworld922 Lol! I was asking for top mount for my own similar project requirement! – ExcitingProjects Jan 3 '13 at 7:09

The switches with screwdriver slot are typically used for settings that need to be fixed most of the time and adjusted only infrequently. Think of a selector switch on a rear panel of a fixed industrial device, which sets an address of the device on some modbus. The fact that this switch needs a tool to turn it prevents an accidental change of setting.

I think that there wouldn't be an [official] knob for this switch. But, like the O.P. wrote, there are other selector switches with knobs.