timer
a few possible options - will give it some more thought over the weekend.
1) allocate stick pack(s) relevant to time booked.
2) design/adapt existing PCB relay timer, will ask Alan to look at this for you.
3) use existing voltage drop buzzer PCB, will not stop the car but will emit a buzz
4) use WiFi receivers and adapt existing firmware for remote stops!
...depends whether you want to spend £0 per car or ££££s per car.
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