simple electronics code lock system
#code lock
#security
#electronic lock
#access control
#keypad
#microcontroller
#password protection
#digital lock
#authentication
#safety
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Home Security System
This alarm circuit activates when switches S1 through S5 are engaged. This action illuminates LED1 and triggers transistor Q1 through integrated circuits IC1C and IC1D. Relay RY1 is configured for self-latching. Switch S10 is utilized for resetting the circuit. When...
Industrial Building Automation System (IBAS) - 4
The two optical sensors will provide a count of individuals to the microcontroller, which will relay this value to MCU-II. The microcontroller will detect the entrance of any person through high-to-low pulse transitions on input pins A3 and A4.
The circuit...
87C51 Selling Leads
This circuit utilizes an 87C57 microcontroller along with several peripherals to convert X-10 power-line carrier-code formats from a personal computer for use with an X-10 power-line interface in a home control system. Software details can be found in the reference....
Microcontroller Relay Driver and Interface
Many microcontroller designs typically integrate various interfacing methods. A microcontroller (µC) system can be viewed as a system that reads from inputs.
Microcontroller systems are versatile platforms that facilitate the integration of multiple interfacing methods to interact with various peripherals and...
Door electronic lock with Keypad
It is a relatively simple circuit of electronic lock of safety with code of 7 digits. It should is given attention in the time that will be stepped the keys, that shape code and it does not exist it delays....
electronic hotel door vulnerability using stealth lock circuit
The term "pentester" refers to a penetration tester, individuals who assess security vulnerabilities. Many high-end hotels globally depend on keycard locks for securing hotel rooms. However, recent incidents of theft have shown that these locks may not be as secure...
Controlling high-current circuits
Digital output from a microcontroller is typically a low-amperage signal. For example, when a pin is set HIGH on the microcontroller (in Wiring/Arduino, it is digitalWrite(somePin, HIGH);), the voltage from that pin is usually +3.3V or +5V, with the current...
microcontroller How does this power supply circuit work? (MCU + LM317)
The filter consisting of resistors R1, R2, and capacitor C1 integrates the PWM waveform. The purpose of the operational amplifier appears to be that of a non-inverting amplifier, with the gain determined by resistors R6 and R7. However, the need...
synchronizing fireflies ng
This is a remake of the fireflies project that was created a year ago. The concept revolves around the emergence of patterns, particularly the synchronization of hundreds or thousands of fireflies. Initially, they flash randomly, but over time, influenced by...