Circuit Lake » Alarm

Interruption Alert System

admin — Wed, 01 Feb 2012 22:47:28 +0000

This M32C/84-based office message board project allows you to display a preprogrammed message like “do not disturb”, “in the Lab”, “At Lunch” etc on the LCD positioned at the door. The project has a keypad which is placed on a desk. On this keypad there are 15 buttons and 6 LEDs for control and [...]

Soil Moisture and Temperature Alarm for Gardener

admin — Sat, 31 Dec 2011 01:38:10 +0000

SmartProbe is simple low cost moisture and temperature alarm system for plants. Insert it in the plant’s root system and it measures the moisture and temperature. It sounds an alarm if the moisture or temperature goes out of preset limits. Shut it off with a gentle tap or knock on it to ask it the [...]

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Gas Leakage Alarm

admin — Sat, 15 Oct 2011 01:33:56 +0000

Here is a circuit that can be used to detects the leakage of LPG gas and alerts the user through audio-visual indications. The circuit uses SEN-1327 gas sensor module from RhydoLABZ. Its output goes high when the gas level reaches or exceeds certain point. A preset in the module is used to set the threshold. [...]

Wireless Pool Alarm, WatchDuck

admin — Thu, 16 Jun 2011 00:08:18 +0000

The WatchDuck is an accelerometer-based low cost wireless pool alarm. It will give an alert when a child or an object fell into water. All operation in this project is controlled by PIC 18F23K20 microcontroller. The alarm is composed of two parts: the detector and the base station. The detector is using an accelerometer module [...]

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Simple Temperature Alarm

admin — Tue, 15 Feb 2011 18:06:15 +0000

The project shows you how to build a simple temperature alarm with PIC16C84 microcontroller and a 2-line LCD display. It can be used as a temperature alarm or a thermostat – the only difference being that with an alarm an intermittent beep is produced when a limit is exceeded.The project comes with 3-key keypad which [...]

Chimney Fire Alarm Monitor

admin — Tue, 18 Jan 2011 19:27:55 +0000

Chimney Sentinel is remote fire alarm that can give a warning of fires caused by wood-burning appliances. The project uses a probe inserted in the chimney and a remote monitoring unit built based on PIC16F628. When a fire is detected, the device will sounds an alarm before smoke has time to reach other detectors within [...]

Mini Train Stop Alarm, Station Master

admin — Fri, 03 Dec 2010 18:29:15 +0000

The Station Master is a small key ring sized alarm that uses an accelerometer to track your movement. The device will gently vibrate and let you know when you’ve reached your stop and it’s time to disembark from the train. Using a simple one button interface the user can set an alarm for the right [...]

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