Welcome to TFP! We have some pretty extensive topics on homemade panels already. Check these topics out first, and feel free to post if you have further questions.
<URL url="Building a FACP text=“viewtopic.php?f=3&t=6121”>Building a FACP
<URL url="Building a Micro-controller powerd FACP text=“viewtopic.php?f=4&t=6390”>Building a Micro-controller powerd FACP
<URL url="Residential Security System text=“viewtopic.php?f=47&t=6952”>Residential Security System