Hi!
I’m not familiar with your project, but I think that the 78L05 will be too poor. If you are using 12V source, 7V will drop on the regulator. Imagine, when your board is drawing 100mA, the regulator’s power dissipation is 0,7W. It will become too hot very quickly. I suggest you to use 7805 with heat shrink package and screw the regulator on the cooper surface of the PWB. Important, the heat shrink is connected to the GND pin. The best way to use a low-drop regulator (like LM2931A-5) and a lower voltage source (7-8V).