Added in all of the supporting circuitry to allow the gate sensor to be connected directly to real hardware. So transistors were added to allow interfacing to devices that draw more amperage than the arduino can support like the beeper and the relays.
The real reed switch is connected as well as the beeper and the relays.
I ordered some 12V relays to keep everything at 12V, so to get by for now, I have to produce 5V to drive the relays that I have on hand.
Once I have the relays, I will be ready to create a printed circuit board and take this to the gate to experiment further.
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