My model of MX-5 is: 2018 RF as I’m located in the South.
After a close call, I’ve decided to get a dashcam. I don’t think the make/model is relevant, but it’s likely to be a Vantrue N4 Pro. I’d like it hardwired and will probably place the rear on the wind deflector.
The hardware kit comes with voltage protection and includes the option to set it to 11.6, 11.9V, 12.2V, 12.5V, 23.6V, 23.9V, 24.2V or 24.5V. Does anyone have any recommendations as to which to use or avoid?
No idea, but it is bizarre as electrical stuff would normally have a built in voltage regulator. I suggest contacting the manufacturer for clarification.
A car will be anything up to 14.8V (approx) when running normally.
All the advice here seems good, so I’ll just add how I set my dashcam up.
I broke apart an old 12v cig lighter USB thing (this serves as my voltage regulator), and then attached it to a 12v line that runs ONLY when the car is on. It’s been working flawlessly for about a month.
If you cannot find 12v that is on only when the car/acc is on, you can get a relay (I found one for like £5) and just add that to trigger on whatever ACC line you do have.