Print PDF
Favorite
Email
This project is about making an alternate authentication method for sudo running on linux systems using a arduino with a dial pad from an old phone.
Remove these ads by
Signing UpStep 1Harware
Normally the dial pad used in this project has four therminal. one pair is a normally open switch than closes when the dial is off the initian position, the second one is normally closed tha opens on each pulse.
The schematic only consist of tree simple pullup resistor conections like this one.
VCC - R(100Ohm) - ARDUINO PIN - SWITCH - GND
The thrid one is used for a switch to manually tell the arduino to send the data to the computer.
The schematic only consist of tree simple pullup resistor conections like this one.
VCC - R(100Ohm) - ARDUINO PIN - SWITCH - GND
The thrid one is used for a switch to manually tell the arduino to send the data to the computer.
| « Previous Step | Download PDFView All Steps | Next Step » |
 |
Add Comment
|
