This circuit shows you how to build a tripwire alarm using invisible light. Imagine a light beam like a fence. If someone walks through the beam interrupting it, a loud alarm goes off to scare them away and let you know someone is there. This is a fun project but remember real security systems are […]
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Infared (IR) Sensor Alarm Circuit using TSOP1738
This guide shows you how to build a basic alarm system that uses invisible light beams to detect intruders. This type of alarm is called an IR alarm because it uses infrared light. It uses a special chip called a IC 555 to create a beam of infrared light that goes across a room. If […]
Simple Infrared (IR) Intruder Alarm Circuit
This article shows you how to build a cool alarm system that uses invisible light beams to detect intruders! It has two parts: a transmitter and a receiver. The transmitter sends a beam of infrared light across a room. If someone walks through the beam, it triggers the alarm. This is a great project to […]
Designing a Simple Solar-Powered Plant Watering Alarm Circuit
Solar power is a clean and never ending source of energy we can use for many things. This article shows you how to build something cool with solar power: a plant waterer that works by itself and tells you when your plants are thirsty. It is a fun project that combines using the sunsenergy with […]
How to Build Basic Fire Alarm Circuit
Every home needs a fire alarm! It is a small device that can save lives by letting you know about a fire early. This article shows you how to build a basic fire alarm circuit yourself. It is perfect for smaller places like homes, offices or workshops that do not need a super complex system. […]
Building a Laser Alarm Circuit for Security
Want to be your own home security hero? This guide will show you how to build a basic laser alarm circuit, like something a real spy might use. It is a fun project you can do yourself to protect your stuff, and it is easier on the wallet than fancy store bought alarms. What is […]