One will be able to walk up to the trunk of the car, touch their hip (which contains their wallet which contains an RFID card) to a specified point, causing the trunk to pop open. It will employ radio frequency identification to sense the human subject, a servo to pull the cord that pops the car trunk and an arduino to control the system. The system will be completely hidden from the outside.
This project will also allow me to explore a deeper understanding of electronics and C based code.
It is important to integrate technology into our lives, enhancing day to day activities, and the standard of life. My goal in this project is turn a mindless but routine task into a natural extension of our lives.
Thank you to sparkfun.com and Electronics plus for being great part suppliers with awesome consumer service and an infinite amount of helpful information. Shout out the Open Source community...
I don't expect anything negative to occur, but this is electronics, so that being said:
I am not responsible for anything bad that may come from this instructables, by reading this, you agree to not hold me responsible for anything.
Step 1: What is RFID
RFID stands for Radio Frequency Identification. It is a system that employ's low power radio waves to transmit data. The system requires a reader and a tag. The tag stores the data which gets read by the reader. All tags will transmit data but how they are activated or actually transmit the data varies depending on the tag.
Three main types of tags:
Cheap, small tags that require no internal battery. The reader outputs a radio frequency which "activates" the tag's circuit. The energy from the radio wave is also enough to activate the tag and then send back the data through the returning radio wave. This relies heavily on the connection between an electric field and a magnetic field. The radio wave induces a magnetic field in the circuit and thereby induces electric current, powering the system. The tag includes a small amount of circuitry and an antenna. The larger the antenna, the greater the range as a result of greater energy "absorption".
Relies on the reader to supply the power required to send the signal (radio wave full of data) back to the reader. They have a small battery to power the circuit but rely on the energy from the radio wave to broadcast the signal back to the reader (similar to how the passive tag broadcasts it signal)
Active tags are completely battery powered. They still respond to a reader but the circuit and the return signal are battery powered. This greatly increases the range as well as the cost.
Extra Sources (and sources used):