Multifunction code lock kit with CD4011 and CD4013 circuits

Do you want to build your own functional security system, secure your drawer, cabinet or secret entrance to your workshop and at the same time get into the secrets of digital logic? The DIY multi-functional code lock kit is the ideal project for all avid DIYers, electronics students and tinkerers who want to combine learning how to solder with creating a highly practical device.

This electronic puzzle does not use any complex microcontrollers or programming. The whole magic of getting the combination of passwords and unlocking right is built on pure hardware logic and reliable CMOS integrated circuits. So you will learn how digital gates and flip-flop circuits actually work in practice.


The main advantages you will appreciate in the workshop and during assembly:

- Great school for advanced soldering: the printed circuit board (PCB) offers a clear layout of the components. Fitting components from resistors and capacitors to integrated circuits and keypads will test and hone your soldering skills.
- Pure hardware logic (CD4011 + CD4013): no code, no firmware. The lock operates on proven chips - CD4011 (quad gate NAND) and CD4013 (double flip-flop type D). You will understand the fundamental pillars of cybernetics and digital technology.
- A complete matrix keyboard in the package.
- Wide range of applications (Multifunctional interface): The circuit output can be easily connected to a power relay, electromagnetic lock, buzzer or servo motor to create a complete access control system for real doors or mailboxes.


Technical specifications (All data in one place)

- Product Type.
- Main ICs: CD4011 (NAND logic gate) + CD4013 (Dual D-Type Flip-Flop)
- Power supply voltage: 5 V to 12 V DC (ideal for powering from a conventional AC adapter or battery pack)
- Code entry: Integrated push-button matrix keypad
- Component mounting type: THT (conventional hole mounting for trouble-free hand soldering)
- Base material: High quality printed circuit board with protective non-soldering mask and clear printing of component positions


Package Contents:

- 1× Professional printed circuit board (PCB)
- CMOS series control chips (CD4011, CD4013) including corresponding protective sockets
- Complete set of buttons to assemble the keyboard
- Required resistors, capacitors, diodes and status indication LEDs (unlocked/locked)