Touch light not working

[Ollie Elmes]

Hello,

I'm an absolute beginner when it comes to electronics and I need some assistance with a touch light please.

The touch light sensor stopped working on our lamp (tested fuse and bulb and they worked fine).

I also managed to wire the light without the touch sensor and could make it work, just my turning the mains switch on and off, which could only leave the touch sensor with the fault?

Replicated wiring from original touch light sensor photo and it's not working.

Photo of previous connection first then my wiring second.

I have since connected the earth black and yellow cable properly.

Also re tested the bulb and fuse in duplicate lamp.

Any help appreciated.

Many thanks,

Oliver

 

[wwfeldman]

don't know
however, when my fingers/hands get dry during winter, touching a button on the screen
of my iphone doesn't always work. so i moisten a finger, and that works.

is the humidity very low whee you are?
are your fingers dry?

 

[tepalia02]

I think you need to replace the touch sensor with a similar new one.

 

[Ollie Elmes]

don't know
however, when my fingers/hands get dry during winter, touching a button on the screen
of my iphone doesn't always work. so i moisten a finger, and that works.

is the humidity very low whee you are?
are your fingers dry?

I do have dry hands but the other lamp is working fine when I touch it.

--- Updated Mar 24, 2023 ---

I think you need to replace the touch sensor with a similar new one.

That's what I've done. The replacement one is an exact match

 

[dick_freebird]

I have found on some touch-switch lamps, that reversing
the hot / neutral plug orientation makes a big difference.
But that may not be the best idea for wet locations.

Might check that whatever the "touch electrode" is, on
the module, has a nice bright connection to whatever
is supposed to be "touch active" (whole body, some plate
or section of the lamp-stack, etc.). And that the earth /
neutral connection, has not. From my occasional poking
it seems these sensors work by imposing a "line hum"
onto the touch-point and detects how much your body
loads that down. Which fails if your body doesn't much
represent a low-impedance-to-earth for reasons of
body or earth or earth-substitute qualities.

And to that note you might do some bench poking, like
attach a 0.01u capacitor to earth and poke the "touch-
plate" with the other end, to see if -some- triggers work
or none at all. Maybe put an AC DMM from touch plate
to earth and see if it's got meaningful "live hum" and if
depressing that hum-level with shunt-to-earth (R, C, RC)
results in actuation, and then how your body contact
compares.

 

[Ollie Elmes]

Ok, many thanks for the advice @dick_freebird.

It's given me some ideas.

Maybe my earth connection isn't bright enough? I've simply twisted the earth from the lamp and the new earth from the touch sensor together. In fact, that's what I've done for all the wiring. Not sure what tool I should be using to connect these?