Martin's corner on the web

House martin cam

House martin cam

A common house martins couple started building their nest in an unfinished tool shack at the far end of my yard few days ago. I still don’t have a door or window on that building, so they can enter and leave freely.…

Detecting AC

Detecting AC

I sometimes have home automation projects that require detecting AC voltage (on/off only), previously have experimented with non-contact AC detection. Here is another approach that may be more suitable for low-power AC detection node: using a NE2 neon lamp and…