I am working on a project with my son. We are harvesting the Intellicode receiver from an old Genie garage door opener. We plan to incorporate this into our smart home for easy access. This will be connected to a wireless garage keypad and when activated it will unlock the front door deadbolt and disarm the security system. Now for my question (seems straight forward but I keep second guessing myself): How much power do I put into this board? The wiring diagram says vcc but it is connected to a transformer. I am thinking that the vcc for the board is the same as the output of the transformer. I just want to be sure so we don't fry the board. Any help would be awesome! Attached are some pictures and the wiring diagram.