• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Circuit Ideas for You

Get free circuit ideas online.

  • Home
  • Privacy Policy
  • About
Home » Security and Protection » Page 4

Security and Protection

Simple Short Circuit Detection and Alert System

Last updated on 15 June 2026 by Admin-Lavi Leave a Comment

Simple Short Circuit Detection and Alert System is very important in power system, as it stop damage when short circuit happen. Short happen when positive and negative wire get touch and this make big current flow and can break parts or burn wire. Furthermore, circuit uses 2 transistor, buzzer and LED to find and show […]

Filed Under: Mini Projects, Security and Protection, Sensors and Detectors, Transistor Circuits

IC 555 Timer Based Vibration Alarm Circuit

Last updated on 15 June 2026 by Admin-Lavi Leave a Comment

To begin with, IC 555 Timer Based Vibration Alarm Circuit is any easy to make, as it senses vibration and gives sound and light alert. Security systems, factory machines and anti-theft devices use this circuit and also the main component, the 555 timer IC sends a steady signal when the sensor detects vibration. Circuit Working: […]

Filed Under: 555 Timer Projects, Alarm Circuits, DIY Projects, Security and Protection, Timer Circuits

Simple Flame Sensor Circuit using Arduino

Last updated on 14 June 2026 by Admin-Lavi Leave a Comment

Flame sensor is very important for many uses like industry machines, safety check and fire alarm. So in this post for Simple Flame Sensor Circuit using Arduino shows how to connect flame sensor to Arduino to find fire; also this project is cheap and works well for real-life fire detection. Arduino Code: Code for Flame […]

Filed Under: Arduino Projects, Hobby Circuits, Mini Projects, Security and Protection, Sensors and Detectors

Build Our Own Solder Fume Extractor Circuit

Last updated on 13 June 2026 by Admin-Lavi Leave a Comment

Soldering make bad smoke which is not good for health, so every work table need good smoke remover. To Build Our Own Solder Fume Extractor Circuit uses few easy parts to remove bad smoke, as it uses BC547 transistor, small DC fan, preset resistor, capacitor and NTC thermistor to make air clean and safe. Here, […]

Filed Under: Mini Projects, Security and Protection

Build Your Own Door Knob Touch Alarm Circuit

Last updated on 13 June 2026 by Admin-Lavi Leave a Comment

Todays time safety is very important, so this Build Your Own Door Knob Touch Alarm Circuit can help protect home and office. Also, this small project is Door Knob Touch Alarm using 555 IC, which can sense when someone touches the door knob. Furthermore, if someone touches then alarm makes loud sound and it scares […]

Filed Under: 555 Timer Projects, Alarm Circuits, Hobby Circuits, Security and Protection

Metal Detector Circuit using Arduino

Last updated on 13 June 2026 by Admin-Lavi Leave a Comment

Metal detector uses electric field to find metal near it. Making Metal Detector Circuit using Arduino is fun for electronics lovers and we can make it using Arduino, CS209A chip, LEDs, buzzer and some other parts. Furthermore, LED and buzzer will show when metal is close, also this project use CS209A chip with Arduino, as […]

Filed Under: Arduino Projects, DIY Projects, Security and Protection, Sensors and Detectors

  • « Go to Previous Page
  • Page 1
  • Page 2
  • Page 3
  • Page 4
  • Page 5
  • Page 6
  • Interim pages omitted …
  • Page 16
  • Go to Next Page »

Primary Sidebar




Categories

  • 555 Timer Projects (90)
  • Alarm Circuits (71)
  • Amplifier Circuits (91)
  • Arduino Projects (103)
  • Audio Circuits (181)
  • Automation Circuits (68)
  • Automobile Circuits (31)
  • Battery Charger Circuits (86)
  • DIY Projects (273)
  • Free Energy (12)
  • Heater and Temperature Controllers (31)
  • High Voltage (24)
  • Hobby Circuits (140)
  • Indicator Circuits (59)
  • Inverter Circuits (19)
  • IoT projects (4)
  • LDR Circuits (43)
  • LED and Lamps (189)
  • Meters and Testers (41)
  • Mini Projects (210)
  • Motor Controllers (24)
  • Oscillator Circuits (58)
  • Power Supply Circuits (205)
  • Radio Frequency (1)
  • Remote Control Circuits (11)
  • Renewable energy (5)
  • Security and Protection (93)
  • Sensors and Detectors (206)
  • Solar Circuits (31)
  • Timer Circuits (58)
  • Transistor Circuits (158)
  • Transmitter Circuit (21)
  • Tutorials (21)
  • Voltage Regulator (22)
  • Water Level Controller (10)

Recent Posts

  • Low Current Controlled Battery Charger Circuit using LM723 IC
  • 741 Op-Amp Treble Booster Circuit
  • Simple Diode and Transistor Based Audio Limiter Circuit
  • Simple 500mW Speaker Driver Circuit
  • Easy DIY LM386 Audio Amplifier Circuit

Recent Comments

  1. Tony Gallegos on NTC Thermistor Based Temperature to Voltage Converter Circuit
  2. colin on Simple Single Transistor Audio Amplifier Circuit
  3. How to Make a Bird Chirping Noise Easily on Chirping Bird Sound Generator Circuit
  4. Transistor Based Medium Impedance Preamplifier Circuit - Circuit Ideas for You on Low Impedance Input Transistor Preamplifier Circuit
  5. Admin-Lavi on Alternate Red Green LED Flasher Circuit

Copyright © 2026 | New Circuit Ideas