I am trying to determine the components I may need to use an NFC sensor to control a solenoid. The amount of space I have to work with is very small - approximately 1 inch. The solenoid I have in mind is less than 1/2" long and can be viewed here - http://www.ebay.com/itm/like/191921105068?chn=ps&dispItem=1
To clarify the problem I am trying to solve. The idea is to have a smart phone app control this entire process and to record all actions. Trying to create a "smart" personal device. The solenoid would serve to "flip a switch" on the device. Again, I have very limited space. I want the required close proximity of the NFC as a security feature to turn on the personal device. The process would be to open the app, key in a PIN, touch phone to device to turn on, touch phone to device to turn off.
The specific questions are:
- Which very small NFC sensor could best service the purpose of communicating with a smart phone and somehow sending the signal to the solenoid?
- Would I need a micro-controller to make the NFC send the signal to the solenoid? Is so, which very small controller would meet this need?
- Am I missing anything else? I know I need a battery source.