Electronic Locks Circuits
This circuit is designed to operate an electric strike or an electromagnetic lock on a door. It does not control the door's opening or closing but rather activates a small electromagnetic strike that unlocks the door. The opener features a code lock implemented with an Atmel AVR microcontroller, specifically the AT90S2313 or ATtiny2313. The program is stored in a 2 kB hex code. The user code can consist of 1 to 4 digits, or up to 8 digits if the chip is purchased. When the correct code is entered, the relay and the electric strike engage for 1 second before turning off. The user code is modifiable via a 3x4 matrix keypad, which is available at local electronic shops. An initial user code of 1234 can be set up with a jumper, which must be inserted before connecting the 12V power supply and removed after two beeps (within 5 to 15 seconds). Additionally, a combination digital lock using CMOS counter ICs allows for flexibility and code changes by altering output connections. This simple electronic combination lock can operate gates or various devices, with a customizable length for the combination. An optional LCD display can be included, although the circuit operates effectively without it. Upon entering the correct combination, a relay is activated for a predetermined duration. The electronic lock functionality is implemented in software, allowing for control over a relay to open a door for a few seconds. The circuit can utilize a PIC16F84A microcontroller. Another design employs common logic ICs to control a relay by entering a 4-digit number on a keypad, utilizing outputs from a CD4017 decade counter. An electronic locker system is also described, which is controlled by a combination of switches arranged in a matrix format. Additionally, a safety lock based on the Attiny26 can work with up to 8 different telecards as access keys, with each card being registered or unregistered through button presses. Another circuit option is the iButton electronic lock, which functions with any iButton by using its unique internal serial number. Lastly, an infrared gate is proposed, featuring two sensors that can monitor occupancy in a restroom, triggering a digital output to activate a ventilator after a specified duration.
The circuit operates primarily on a microcontroller-based architecture, leveraging the capabilities of the Atmel AVR series. The AT90S2313 or ATtiny2313 microcontrollers serve as the central processing unit, executing the programmed instructions to manage user inputs and control the locking mechanism. The user interface is facilitated through a 3x4 matrix keypad, allowing for easy code entry and modification. The initial setup phase, indicated by the presence of a jumper, ensures that the device is configured to a default state, simplifying the initial user experience.
The relay serves as the primary actuator, connecting the power supply to the electromagnetic strike upon successful code entry. The timing mechanism is critical, as the system must ensure that the relay remains engaged only for the specified duration to prevent unauthorized access. The use of a beeping sound provides auditory feedback to the user during the setup phase, enhancing usability.
For additional flexibility, the circuit can be adapted to control various devices beyond just door locks. The combination lock functionality is particularly versatile, allowing for the integration of a range of outputs, such as garage doors, alarms, and other electronic devices. The optional LCD display can provide visual feedback, displaying messages or prompts to the user, although the core functionality remains intact without it.
The electronic locker design emphasizes security through the use of a switch matrix, which can be configured to require multiple inputs for access, further enhancing the security of the stored items. The incorporation of telecards in the safety lock design introduces a modern approach to access control, enabling the registration and deregistration of keys, which can be particularly useful in shared environments.
Overall, this circuit design represents a comprehensive solution for electronic locking mechanisms, with applications extending across various domains, from residential to commercial use. The modular nature of the design allows for easy customization to meet specific user requirements, making it a valuable addition to any security system.This circuit can be used to operate an electric strike or an electromagnetic lock on a door. It is not the door being opened/closed, but a small electromagnetic strike which unlocks the door. The opener has the following features currently programmed in software. (schematic) Code Lock with ATMEL AVR - Code Lock AVR electronic combination lock is realized with Atmel AVR microcontroller AT90S2313 or ATtiny2313. Program in hex code is 2 kB long. User code is consisted of 1 to 4 digits. If you buy the chip than user code is consisted of 1 to 8 digits. If the code is entered in the correct sequence, then after 1 second the relay and the electric striker (in the door) switch on for 1 second and then switch off again. User code can be changed via 3x4 matrix keypad. Keypad for CodeLock can be bought at local electronic shop. Initial user code (1234) is set up with a jumper. The jumper must be inserted before the voltage (12V) connection. The jumper must be removed after 2 beeps (after 5 to 15 seconds). . (circuit design) Combination Digital Lock - A multiple input combination lock using CMOS counter IC`s.
Flexibility and code change is allowed by changing output connections. (schematic / circuit design) Combination lock - Operate your gate or something different by this simple electronic combination lock. The combination can have a chosen length of numbers or alphabets, and can be changed any time. The LCD display is optional, the circuit works fine without it. After entering the correct combination, a relay is operated for the predefined time. (design) Combination Lock (nutchip) - Combination lock are nice to enable alarms, but are useful for controlling a wide range of electric devices.
These software keys can open gates, garages, TV sets, telephones, VCRs, well pumps. In practice this circuit is capable to lock or time all the devices that can be connected to relays. (electronic design) Electronic Lock - This is my electronic combination lock to use with an outdoor gate. The functionality is implemented in software. It turns on a relay (usually to open a door) for a few seconds . Uses a PIC16F84A (circuit) Electronic Lock (Bill Bowden) - The digital lock shown below uses 4 common logic ICs to allow controlling a relay by entering a 4 digit number on a keypad.
The first 4 outputs from the CD4017 decade counter (pins 3, 2, 4, 7) are gated. Electronic Lock circuitdb - The digital lock shown below uses 4 common logic ICs to allow controlling a relay by entering a 4 digit number on a keypad. The first 4 outputs from the CD4017 decade counter (pins 3, 2, 4, 7) are gated. Electronic Locker - This circuit is an Electronic Locker. It is controlled by a switches combination (by a code). There is a switch matrix on the door of the locker. This one is a unit of switches connected into 4 arranged of 4 columns for a total of eight terminals.
(circuit design) Electronic Safety Lock Based on Attiny26 - This safety-lock can be work with up to 8 different telecards (empty or not) as access keys. Each tele card can be registered or unregistered fromthe system, by press the corresponding button. (electronic circuit) iButton electronic lock Circuit - This electronic lock can be used with any type of iButtons you may already have, since the only thing needed is the internal serial number, that`s different for every iButton .
(circuit diagram) Infrared gate 2 (Peter Jakab) - This is an infrared gate with two sensors planned to use in the wall in the way behind a door. It can be applied in a toilet to keep track of that someone is inside exceeding a certain amount of time.
After that time elapsed, the circuit triggers the digital output which can turn on a ventilator. The time period. (electronic circuit) Simple combination lock - This experiment may be built using only one 8-position DIP switch, but the concept is easier to understand if two switch asse 🔗 External reference
The circuit operates primarily on a microcontroller-based architecture, leveraging the capabilities of the Atmel AVR series. The AT90S2313 or ATtiny2313 microcontrollers serve as the central processing unit, executing the programmed instructions to manage user inputs and control the locking mechanism. The user interface is facilitated through a 3x4 matrix keypad, allowing for easy code entry and modification. The initial setup phase, indicated by the presence of a jumper, ensures that the device is configured to a default state, simplifying the initial user experience.
The relay serves as the primary actuator, connecting the power supply to the electromagnetic strike upon successful code entry. The timing mechanism is critical, as the system must ensure that the relay remains engaged only for the specified duration to prevent unauthorized access. The use of a beeping sound provides auditory feedback to the user during the setup phase, enhancing usability.
For additional flexibility, the circuit can be adapted to control various devices beyond just door locks. The combination lock functionality is particularly versatile, allowing for the integration of a range of outputs, such as garage doors, alarms, and other electronic devices. The optional LCD display can provide visual feedback, displaying messages or prompts to the user, although the core functionality remains intact without it.
The electronic locker design emphasizes security through the use of a switch matrix, which can be configured to require multiple inputs for access, further enhancing the security of the stored items. The incorporation of telecards in the safety lock design introduces a modern approach to access control, enabling the registration and deregistration of keys, which can be particularly useful in shared environments.
Overall, this circuit design represents a comprehensive solution for electronic locking mechanisms, with applications extending across various domains, from residential to commercial use. The modular nature of the design allows for easy customization to meet specific user requirements, making it a valuable addition to any security system.This circuit can be used to operate an electric strike or an electromagnetic lock on a door. It is not the door being opened/closed, but a small electromagnetic strike which unlocks the door. The opener has the following features currently programmed in software. (schematic) Code Lock with ATMEL AVR - Code Lock AVR electronic combination lock is realized with Atmel AVR microcontroller AT90S2313 or ATtiny2313. Program in hex code is 2 kB long. User code is consisted of 1 to 4 digits. If you buy the chip than user code is consisted of 1 to 8 digits. If the code is entered in the correct sequence, then after 1 second the relay and the electric striker (in the door) switch on for 1 second and then switch off again. User code can be changed via 3x4 matrix keypad. Keypad for CodeLock can be bought at local electronic shop. Initial user code (1234) is set up with a jumper. The jumper must be inserted before the voltage (12V) connection. The jumper must be removed after 2 beeps (after 5 to 15 seconds). . (circuit design) Combination Digital Lock - A multiple input combination lock using CMOS counter IC`s.
Flexibility and code change is allowed by changing output connections. (schematic / circuit design) Combination lock - Operate your gate or something different by this simple electronic combination lock. The combination can have a chosen length of numbers or alphabets, and can be changed any time. The LCD display is optional, the circuit works fine without it. After entering the correct combination, a relay is operated for the predefined time. (design) Combination Lock (nutchip) - Combination lock are nice to enable alarms, but are useful for controlling a wide range of electric devices.
These software keys can open gates, garages, TV sets, telephones, VCRs, well pumps. In practice this circuit is capable to lock or time all the devices that can be connected to relays. (electronic design) Electronic Lock - This is my electronic combination lock to use with an outdoor gate. The functionality is implemented in software. It turns on a relay (usually to open a door) for a few seconds . Uses a PIC16F84A (circuit) Electronic Lock (Bill Bowden) - The digital lock shown below uses 4 common logic ICs to allow controlling a relay by entering a 4 digit number on a keypad.
The first 4 outputs from the CD4017 decade counter (pins 3, 2, 4, 7) are gated. Electronic Lock circuitdb - The digital lock shown below uses 4 common logic ICs to allow controlling a relay by entering a 4 digit number on a keypad. The first 4 outputs from the CD4017 decade counter (pins 3, 2, 4, 7) are gated. Electronic Locker - This circuit is an Electronic Locker. It is controlled by a switches combination (by a code). There is a switch matrix on the door of the locker. This one is a unit of switches connected into 4 arranged of 4 columns for a total of eight terminals.
(circuit design) Electronic Safety Lock Based on Attiny26 - This safety-lock can be work with up to 8 different telecards (empty or not) as access keys. Each tele card can be registered or unregistered fromthe system, by press the corresponding button. (electronic circuit) iButton electronic lock Circuit - This electronic lock can be used with any type of iButtons you may already have, since the only thing needed is the internal serial number, that`s different for every iButton .
(circuit diagram) Infrared gate 2 (Peter Jakab) - This is an infrared gate with two sensors planned to use in the wall in the way behind a door. It can be applied in a toilet to keep track of that someone is inside exceeding a certain amount of time.
After that time elapsed, the circuit triggers the digital output which can turn on a ventilator. The time period. (electronic circuit) Simple combination lock - This experiment may be built using only one 8-position DIP switch, but the concept is easier to understand if two switch asse 🔗 External reference
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