The Plain Facts, Carved
What It Is
A simple three-port solid state relay board, the S108T02 at its heart — three switches in one small board, each able to hand mains voltage across to a load with no moving parts and no click. One board, three doors.
Solid state relays are the polite way to switch: no contacts to arc, no coil to chatter, just a triac that opens when the Arduino asks. Three of them on a board means three independent loads — lamps, heaters, pumps, whatever the build demanded — commanded from one microcontroller.
Byrne by name, raven by temperament: it answers three doors at once and never makes a sound doing it.
Told in the Seanchaí Tradition
The Build Story
The old raths kept three-way gatestones, the story goes — one path for the visitor known by sight, one for the visitor known by name, and one for the visitor known only by which knock they gave. You did not get in by knocking louder; you got in by knocking right. ByrneLite is the workshop’s version of that stone: a small board with three doors and no moving parts, each door a solid state relay that opens without a click the way a good gate opens without a word. The Athlone bench in 2013 was deep in the years of making the house answer back — lamps that listened, heaters that obeyed — and the trouble with three projects is three switches, and the trouble with mechanical switches is that they click, and chatter, and eventually refuse. The S108T02 does not; it opens the way silence opens, on command, every time. Byrne, the name says — and there is an old streak of the name in the west that means raven, and the raven keeps three gates in the stories and never explains the rules to anyone twice. This board explains them once, in copper, and then keeps them.