Hello again people, since I made my previous https://starmadedock.net/threads/system-password-4-digit-256-possible-combinations.7777/#post-112907 , many people ask me if i can build another system with more possible combinations, because 256 combinations seem very few 
, so now, I bring you a new system, using the versatility of BINARY code, to store password information more efficiently, occupying minimal space.
1. SYSTEM DESCRIPTION
2. SYSTEM BLOCKS
3. SOME IMAGES WITH EXTRA INFORMATION
4. HOW DOES IT WORK
5. OTHER EXPANDABLE OPTIONS
If someone wants more detailed information of the configuration of the any different parts, let me know in the post, and if you do not understand something, ask costs nothing.
If you like this and you see that may be useful, dont forget give me your "LIKE"
, so now, I bring you a new system, using the versatility of BINARY code, to store password information more efficiently, occupying minimal space.1. SYSTEM DESCRIPTION
- Only 9 buttons to enter the password in the system (expandable to 16 buttons with a few adjustments).
- A button to change the mode of operation, key editing mode and normal operation mode.
- A button to delete the password stored.
- 3 lights to show the actual situation of the entire system.
- A button to change the mode of operation, key editing mode and normal operation mode.
- A button to delete the password stored.
- 3 lights to show the actual situation of the entire system.
2. SYSTEM BLOCKS
The actual system has:
- A Keypad 9-digits multiplexed to 4-bit (to use the minimum of logical cubes)
- An array of memory for input / output data
- Logical comparator 4 bits
- A countdown automatic activation / system reset
- A Keypad 9-digits multiplexed to 4-bit (to use the minimum of logical cubes)
- An array of memory for input / output data
- Logical comparator 4 bits
- A countdown automatic activation / system reset
3. SOME IMAGES WITH EXTRA INFORMATION
4. HOW DOES IT WORK
- If the system dont have any password stored ORANGE LIGHT is ON (notice if system has nothing stored, any password typed send all time error), if the password is wrong the system send a signal error to RED LIGHT and if the password is correct it send a signal to GREEN LIGHT.
- To change the mode of operation, button (A) must be pressed, this will enable the button (B) to delete the current stored password in the memory ( the action to change the operation mode, send a signal to the red light when the system goes into recording mode and a signal to green light when in test mode ), when you finnish to set your password, a signal is sent to the red light to confirm the correct operation ( depending on the time set on the countdown )
- When we introduced our key, we press again the button (A) to make ready our key system to use / test.
- When the system is in edit mode, the reset button ( B ) will erase the current password, when the system is in test mode, the same button, erase the password entered without waiting for the countdown time.
- Trying to use the minimum of buttons on the console, I have chosen to put a countdown, when we press any button of the main keypad, it starts counting, if the time span of 5 seconds another Keypad button is not pressed again, the system compare the stored password with the password entered. In both cases, whether correct or not, the system will reset and erase the entered password, preventing the system remains activated ( read the info in point 5 to know how reduce the countdown time ).
- To change the mode of operation, button (A) must be pressed, this will enable the button (B) to delete the current stored password in the memory ( the action to change the operation mode, send a signal to the red light when the system goes into recording mode and a signal to green light when in test mode ), when you finnish to set your password, a signal is sent to the red light to confirm the correct operation ( depending on the time set on the countdown )
- When we introduced our key, we press again the button (A) to make ready our key system to use / test.
- When the system is in edit mode, the reset button ( B ) will erase the current password, when the system is in test mode, the same button, erase the password entered without waiting for the countdown time.
- Trying to use the minimum of buttons on the console, I have chosen to put a countdown, when we press any button of the main keypad, it starts counting, if the time span of 5 seconds another Keypad button is not pressed again, the system compare the stored password with the password entered. In both cases, whether correct or not, the system will reset and erase the entered password, preventing the system remains activated ( read the info in point 5 to know how reduce the countdown time ).
5. OTHER EXPANDABLE OPTIONS
- Using the BINARY code, the encryption system can contain a large amount of information, this is the actual configuration and possible passwords of the system i bring to you people:
- For example if we use all possible combinations of 4 bits using 16 numbers:
And now you are wondering ... what if you do not want to use a password of 9 digits? It is as simple as using C & V in the module that gives the results of the comparison password
If you want use a 5 digits password long, just C&V from 1 ... 5 Flip-Flop to the AND gate and let the others 6 ... 9 Flip-Flops unattached to the AND gate (notice when you enter your password, you must not exceed the size of the password entered, otherwise the system send Error).
Now, if you want to do the countdown time shorter , you only have to do C & V in the corresponding DELAY-TIMER and the AND gate ( the same AND GATE like for set the size of the password ).
If someone wants more detailed information of the configuration of the any different parts, let me know in the post, and if you do not understand something, ask costs nothing.
If you like this and you see that may be useful, dont forget give me your "LIKE"
