Twist Grips are available as spare parts for electric scooters. They
commonly work using magnets and hall effect devices.

RP


On 29 October 2013 18:53, K S <kresho@gmail.com> wrote:

> Thanks.
>
> Pitch bend wheel looks ideal but seems very hard to buy except as part of
> something bigger.
>
>
> On Tue, Oct 29, 2013 at 3:19 PM, Matt Callow <mc-lists@tesco.net> wrote:
>
> > How about a single axis joystick, or a pitch bend wheel?
> > Matt
> >
> >
> > On 29 October 2013 14:00, K S <kresho@gmail.com> wrote:
> >
> > > Hi piclist.
> > >
> > > I'd like to electrically propel a hand driven cart and need some way
> for
> > > the operator to set the speed. I'm hoping for some type of thumb
> > activated
> > > lever that could be mounted to a cross bar. (I'm thinking like the ge=
ar
> > > levers on some pushbikes, but need not be.) It could either be a
> > multi-step
> > > switch (for, say, slow, medium and fast) or preferably a 1/4 turn pot
> or
> > > similar which gives full control across the range. When let go it
> should
> > > spring return back to zero.
> > >
> > > Maybe someone knows the name of what I'm looking for? I'm hoping for
> > > something off-the-shelf.
> > >
> > > TIA.
> > > Kris.
> > > --
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