NFC activated momentary 12V switch (help me)
Howdy guys and girls,
I'm looking to wire in a kill switch to my motorbike, and the safest option I can think of is an NFC activated switch on the starter relay trigger circuit. It's a bit difficult to find and flip a kill switch if it's not a physical switch.
So far all I can find is an Arduino/NFC reader/relay setup, but I was wondering is anyone more versed in NFC tech could suggest a less intensive way? I'm looking to replicate a physical momentary switch, a simple open/close operation, without needing the programming and extra components. Is it possible to create a simple switch using only a reader that picks up any passive NFC, or would it have to hold the required data?
I have no idea if any of that made sense, but any help would be appreciated!
Cheers
Comments
First off, you do need some sort of reading device to get anything off an NFC tag. On top of that you'll need a microcontroller of some sort to make the reader do what you need. A simple but bulky solution would be an Arduino (as you found out already).
As for a switch, there are many options. There are solid-state relays easy to drive with an Arduino and very little to go wrong. If you'r a bit better versed you may want to pick a more tailored part depending on the precise action you want to perform such as a mosfet.
Keep in mind that Arduinos typically are pretty power hungry hippos and can drain your motorbike battery if it's always turned on.
Thanks ThomasEgi, it seems like an Arduino will be the way to go. I'll do some reading. A relay will do exactly what I need, which is just switching the control circuit for the starter relay open/closed so the original electrics can do what they need. Re the Arduino draining the battery I'll have it powered by ignition power instead of constant power - although another option I just considered would be only powered up in the start position, which may require a little bit of thinking.