|
Overview The extreme business card project is created with two experiments consisting one in the form of a key ring torch and one that dials by itself. Explanation The torch is the easier of the two experiments where some PVC cards can be used to enclose a hand-wired version which makes copies much easier with a proper PCB. The battery is inserted with the positive side up and a functioning key ring light would show upon pressing the button. The battery can be changed from CR2032 cell to a CR2016 since this is thinner and it can be mounted inline by cutting a hole in the board. By sending the series of audio tones known as DTMF that the phone system uses to dial numbers, it actually dials. This is made possible because of miniature programmable microcontrollers which are small and cheap and can be put in disposable items. A Microchip microcontroller was used which can run any small program written and can run it at 4 million instructions per second. One of the parts of the dialer is the very cheap blank PVC ID cards used to enclose all sorts of other electronic gadgets. Rest of the project
|
