LANC controller

[olkhoff]

Hi to all! In the first, sorry for my English- I'm from Russia and started to learn English recently...
I made underwater housing from aluminium tube with spherical glass port for the SONY TRV940. Now I'm doing an external viewfinder and LANC controller. But I think how to make buttons for the controller. There are some ideas? The controller must be managed using the magnets for Hall sensor... I need some ideas of buttons construction
WBR, Alexey
PS. This is old photos of previous project, in the near future I'll make a new photos

 

[gracet]

Did you get to read a manufacture application manual, I know ive seen them, here is one
yahoo search “hall effect Sensing and Application” particular chapter 3. (honnywell)
And also “section 3 application” report on the melexis product site.
These descriptions only cover the hall-effect magnet switch placement, not how to build a real button.
But the common placements are shown.

The button design, is to move a magnet (or alter a field) which is compatible with a hall-effect switch points. You want to make sure on and off points are generously engaged in the hall-effect switch ( or reed-swtich) so that the final behavior is reliable. This might mean finding switch points (as a distance or motion) first to then obtain the required button distance movement distance. The button has to move the magnet far enough to reliability switch on and off.

Your picture seems to show sliding switches as a design allready. You have not introduced your new project. I would think slide switches are easyer to hobby build then a push button.