Electronic code lock design
Design an electronic password lock, enter the password in the locked state, the password is 4 digits, use the data switch K1ï¾K10 to represent the numbers 1, 2, ..., 9, 0 respectively, the input password is displayed by the digital tube, and the last input The password is displayed on the rightmost digital tube, that is, each time you enter a single digit, the password is shifted to the left by one digit on the digital tube. The entered number can be deleted, and the last entered number is deleted. Each time one bit is deleted, the password is shifted to the right by one digit in the display of the digital tube, and "0" is added to the left empty bit. The state of one output level represents the open and close state of the lock. To ensure that the password lock owner can open the password lock, set a universal password and use it when the owner forgets the password.
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Design tips:
Password input deletion control module registration module comparison module scan display module
The 8 layer PCB is a circuit board with 8 layers that are stacked firmly together with predefined and dependable mutual connections between the layers. Structure of eight layer PCB is more complicated. Nowadays, PCBs frequently have 8 to 12 layers or more, and electronics engineers know that designing for so many layers requires a well-configured layer stack.
Standard stackup of 8 layer PCB looks as follows
- Signal1
- Ground
- Signal2
- Power
- Ground
- Signal3
- Power
- Signal4
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