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:

New Circuits

.

 


Popular Circuits

sound detector switch
1KHz Sinewave Generator
motion detector sensor circuit
FM
LMV1090 Dual Input Far Field Noise Suppression Microphone Amplifier
JAM (just a minute) circuit diagram
rf module interfacing with spartan 3an fpga
5-channel low-power interface circuit programmable sensor signal processor AD7714 and MCS-51 series microcontroller
ISO103 gain adjustment circuit diagram
CD4541 circuit diagram of Ni-Cd battery is automatically charged
Digital display temperature detection circuit



Top