Deafening silence defined is :

'A silence or lack of response that reveals something significant, such as disapproval or a lack of enthusiasm'

Bo ....

You expect to see people disappear from threads labeled:
Interfacing AC power lines....
...transformerless DC supply...
How to design without opto-couplers ...
How to measure high voltage while standing in a bucket of water...

But not from a thread labeled, “AT/PS2 Keyboard - PIC Interface?” ?

Then again we have to consider his user name!
Kamikaze47 where are you??
Definitely some valid chirps :-) apparently apparitions do re-appear and it's not all smoke and mirrors :-).
Now I'm wondering if you have are planning to interface and AT/PS/2 keyboard to the AC mains line that delivers a different 'ZAP' at each keypress ?? Could it be solar-powered or we gonna just stick to the original hookup to directly the substation on 3-phase ?

The silence in this thread has me a little worried too since i haven't seen Steve around since I asked about some possible measurements (In the post before he said he wasn't to do a few measurements 'cos of his trusty isolation transformer ), I haven't seen any activity on this thread from him since then.
And all of a sudden this thread went extremely quiet...!

Shocking I tell you !

Kind regards

Dennis