make usb password generator for


Posted on Feb 5, 2014

The device implements the USB boot HID keyboard protocol so once plugged in, the device can receive keyboard LED state changes (caps lock, num lock, scroll lock), which are used in the firmware to trigger new password generation (four LED toggle messages, i. e. four caps lock presses). Randomness for the generated password is also taken from LED st


make usb password generator for
Click here to download the full size of the above Circuit.

ate change timings - ATtiny85 timer is left running and every time an additional state change happens, lower 6 bits in TCNT0 are used to add one character to the password - so for a new 10-character password (default setting), a total of 4+10 caps lock presses generate a new password, which is stored in EEPROM.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Pulse-position-modulator
    Vocal Eliminator
    Cw Keyer
    Room Monitor Circuit
    Telephone Scrambler Circuit
    Removable Memory Card (MMC) on mobile phones circuit
    DDR Memory Power Supply: 5V to 28Vin 1.5V@ /-10A Vtt (3V external reference)
    555 ics hysteresis for dark activated
    relay flasher circuit
    Stepper motor controller - Driver circuit with circuit design
    SA2132 AM/FM RADIO RECEIVER
    mid position valve
    Inverter Schematics
    5x10 vu meter
    Direct start without power compensation circuit



    Top