On the way to assemble TiCK keyer.
The PC board size is 3cm x 2.5cm.
I use IC socket to be able to change TiCK1 and TiCK2.
And use connector to ease assemble it.
I use Lithium button Battery CR-2025 for its regulator. It's small and thin.
Close up PC board part.
After that, I put this PCB board into the film case. Here is very small electronic
keyer shown bellow.