[sdiy] Jack insertion detection

[Matthias Herrmann]

The classic Cliff socket CL1384 as used on the older Doepfer modules has both
contacts switched. It is not a right-angle mounted socket though. There are a
lot of these other cheap alibaba sockets with both contatacts switched.

The problem seems to be to find a right angle mounted socket?

If you are looking for right angle sockets, the Thonkiconn is now available in
stereo, too (PJ366ST). they have the same height as the mono thonkiconn
(PJ398SM).

Cheers,
Matthias



> On 2018-07-23 14:21 -0700, Tim Ressel wrote:
> 
> > I've got another challenge: how to detect when a plug is
> > inserted into a jack. These are 3.5mm mono jacks btw. The
> > current method is to use a stereo jack. When a mono plug is
> > inserted the ring connection gets shorted to ground by the
> > sleeve of the plug. This method works well, but the stereo
> > jacks are taller than the mono jacks.
> >
> > The only jack I can use is a switched mono jack where switched
> > port is tied to the tip port until a plug is inserted. My idea
> > is to use the switch port to feed an out of range voltage to
> > the tip port, probably a negative voltage. Then use a
> > comparator to detect when the tip port goes high.
> 
> Just in case you don't already know, there are phone jacks with
> isolated switch circuits. Switchcraft 113EX and 113X, for
> example :
> 
>   http://switchcraft.com/Drawings/110x-m110x_series_cd.pdf
> 
> I've seen 3.5 mm sockets with suspiciously high number of pins
> so something similar may exist in that size.
> 
> --
> André Majorel http://www.teaser.fr/~amajorel/