• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Need circuit help? Post them in the comments! I've answered over 50,000!

Blog | Categories | About | Hire Me | Contact | Calculators-online
You are here: Home / Archives for Security

Security

Build a Homemade GSM Car Security System

Last Updated on May 16, 2026 by Swagatam 54 Comments

1 13

This super simple circuit design of a gsm car security system really works.Don’t believe it? Find out and learn the simple method of constructing it. How would you feel if you had the power of controlling your vehicle through your own cell phone, from any part of the world? Learn more how to build a […]

Filed Under: Automobile Electronics Tagged With: Build, GSM, Homemade, Security, System

Infrared Car Door Lock Security Circuit

Last Updated on May 16, 2026 by Swagatam Leave a Comment

IR transmitter compressed

In this post I have explained how to build a simple yet foolproof infrared based remote control, which can be used for locking and unlocking any vehicle door through a personal remote handset. The remote controlled vehicle door lock is foolproof since it works only with a specific IR frequency range, and will not respond […]

Filed Under: Automobile Electronics Tagged With: Door, Infrared, Lock, Security

Simple Motorcycle Security Alarm Circuit

Last Updated on May 16, 2026 by Swagatam 4 Comments

motorcycle anti theft alarm circuit diagram using tilt switch and TTP223

In this article I have explained a simple motorcycle ant-theft security alarm circuit using a tilt switch and a TTP223 touch switch. The circuit was requested by Mr. Sergei, as given below. Design Request and Specifications I am a motorcyclist and I would like to ask you to design a simple and cheap alarm system […]

Filed Under: Automobile Electronics, Security and Alarm Tagged With: Alarm, Motorcycle, Security, Simple

Cell Phone Call Alert Security Circuit

Last Updated on May 16, 2026 by Swagatam 21 Comments

carsecuritycallbackcircuit

This circuit will give call back alerts in the form of blank calls on your cell phone whenever it senses a break in or intrusion inside the particular restricted area where it has been installed for the intended security monitoring. Introduction The cell phone call alert security system circuit which needs to be installed incorporates […]

Filed Under: Automobile Electronics Tagged With: Alert, Call, Cell, Phone, Security

Make this Home Security Project Using Arduino – Tested and Working

Last Updated on May 14, 2026 by Swagatam 2 Comments

Scan 6

In this article we are going to see how to build a home security system circuit using arduino which might save your home from intruders one day. Housebreaking happens every few seconds in the world. By the time you read this sentence, crooks already broke into someone’s house. A golden rule: Prevention is better than […]

Filed Under: Arduino Projects Tagged With: Arduino, Home, Project, Security, Tested, Working

Password Security Lock Circuit Using 4×4 Keypad and Arduino

Last Updated on May 14, 2026 by Swagatam 5 Comments

P 20160905 014952

In this post I will show how to construct a password security lock circuit, which can be accessed by a 6-digit password. To be more precise it is alpha numeric password. Hardware for this Project We are going to utilize 4×4 keypad, which consists of 0 to 9 decimal values, two special character ‘#’ and […]

Filed Under: Arduino Projects Tagged With: 4x4, Arduino, KeyPad, Lock, Password, Security

  • Page 1
  • Page 2
  • Page 3
  • Go to Next Page »

Primary Sidebar

My YouTube Channel

Circuit Simulator: Draw and Simulate Schematics

circuit simulator image

Categories

  • Arduino Projects (95)
  • Audio and Amplifier Projects (134)
  • Automation Projects (18)
  • Automobile Electronics (104)
  • Battery Charger Circuits (90)
  • Datasheets and Components (109)
  • Electronics Theory (151)
  • Energy from Magnets and Earth (43)
  • Games and Sports Projects (11)
  • Grid and 3-Phase (20)
  • Health related Projects (27)
  • Home Electrical Circuits (13)
  • Indicator Circuits (16)
  • Inverter Circuits (98)
  • Lamps and Lights (161)
  • Meters and Testers (72)
  • Mini Projects (28)
  • Motor Controller (68)
  • Oscillator Circuits (30)
  • Pets and Pests (15)
  • Power Supply Circuits (91)
  • Remote Control Circuits (50)
  • Security and Alarm (65)
  • Sensors and Detectors (107)
  • SMPS and Converters (46)
  • Solar Controller Circuits (62)
  • Temperature Controllers (44)
  • Timer and Delay Relay (51)
  • Voltage Control and Protection (44)
  • Water Controller (37)
  • Wireless Circuits (31)

Subscribe to get New Circuits in your Email

Other Links

  • Privacy Policy
  • Cookie Policy
  • Disclaimer
  • Copyright
  • Videos
  • Sitemap

People also Search

555 Circuits | 741 Circuits | LM324 Circuits | LM338 Circuits | 4017 Circuits | Ultrasonic Projects | SMPS Projects | Christmas Projects | MOSFETs | Radio Circuits | Laser Circuits | PIR Projects |

Recent Comments

  • Swagatam on 24V to 12V DC Converter Circuit [using Switching Regulator]
  • Swagatam on Automatic Battery Full Cut-Off Latching Circuit with Trickle Charging
  • Ramin on Automatic Battery Full Cut-Off Latching Circuit with Trickle Charging
  • Joss on 24V to 12V DC Converter Circuit [using Switching Regulator]
  • Swagatam on Simple Capacitive Discharge Ignition (CDI) Circuit

Social Profiles

  • Twitter
  • YouTube
  • Instagram
  • Pinterest
  • My Facebook-Page
  • Stack Exchange
  • Linkedin

Calculators

  • ZVS Induction Heater + Tank Calculator Tool
  • Zener Diode Calculator
  • Wire Current and Thickness Calculator (Ampacity Calculator)
  • Voltage Divider Calculator
  • Transistor Base Resistor Calculator
  • Transistor Astable Multivibrator Calculator
  • TL431 Calculator
  • Solar Panel, Inverter, Battery Calculator
  • Ferrite Core Air Gap Calculator Tool
  • Parallel MOSFET Calculator Tool: How to Connect MOSFETs in Parallel Safely
  • LC Resonance Calculator for EV Battery Charger Circuits
  • LED String Series Resistor Calculator
  • PFC (Power Factor Correction) Calculator Tool: 3kW
  • Passive Power Factor Correction (PFC) Calculator
  • LM567 IC Calculator Tool
  • SMPS Flyback Boost Converter Calculator
  • Shunt Resistor Calculator for Ammeters
  • SCR and Triac Gate Resistor Calculator
  • Battery Back up Time Calculator
  • Boost Converter Calculator (Non-Isolated)
  • Bootstrap Capacitor Calculator
  • Buck Converter Calculator
  • Buck-Boost Converter Calculator
  • Capacitance Reactance Calculator
  • DCM Flyback Transformer & Wire Gauge Wire Size Calculator Tool
  • Filter Capacitor Calculator
  • IC 4047 Calculator (Frequency and PWM)
  • IC 4060 Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • IC SG3525, SG3524 Calculator
  • Inductance Calculator
  • Induction Heater Inductor and Resonant Frequency Calculator
  • Induction Heater Work Coil Calculator
  • Inverter LC Filter Calculator
  • LC Resonance Calculator
  • LED Current Calculator
  • LM317, LM338, LM396 Calculator
  • NAND/NOT Gate RC Values Calculator
  • NOT, NAND Gate Frequency Calculator
  • Notch Filter Calculator Tool
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • RC Filter Calculator
  • Reactance Calculator
  • Sine Table Calculator for SPWM Arduino Code
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • SMPS Calculator for Toroidal Ferrite Transformers
  • SMPS Flyback Transformer Calculator – Design by Target Duty Cycle
  • TL431 Calculator
  • Op-Amp Hysteresis Resistor Calculator

© 2026 · Swagatam Innovations